Dekko Lawn Mower 36B User Manual

NOTE:  
Mower and engine life are ex-  
tended greatly through the use  
of frequent lubrications, oil  
changes and providing routine  
maintenance. To protect your  
investment, do not forget to  
perform routine maintenance.  
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Heavy Duty Power Equipment  
36B, 36BX, 36H, 36HX, 52H, 52HX  
About the DEK Belt Drive Lawn Mower Manual  
Congratulations on the purchase of your new DEK commercial mower. We at GXi International are confi-  
dent that this mower will provide you with the best performance, outstanding quality, and great  
durability when operated and maintained as directed in this manual.  
1. This manual contains assembly, operating, safety, adjustment, maintenance, and troubleshooting instructions.  
BEFORE OPERATING YOUR LAWN MOWER, CAREFULLY READ THIS MANUAL IN ITS ENTIRITY.  
2. This owner’s manual is considered a permanent part of the mower. It must be available to all of the operators  
and/or person(s) servicing the mower. Should the mower be resold, this manual must remain with the mower.  
3. All information, illustrations, and specifications contained in this manual were in effect at the time of the publica-  
tion. GXi International reserves the right to add, delete or modify specifications and/or designs without notice.  
4. If you ever have questions in regards to the operation, maintenance or safety of your mower, please contact the  
DEK technical service line at 1-800-393-0668.  
Table of Contents  
Safety Information  
Safety Warnings .………………………………………………………………...…………………………………………..  
Before Use of Equipment …………………………………………………………………………………………………...  
Operation of Equipment – Safety Cautions ………………………………..……………………………………………...  
Safety Information Decals …………………………………………………………………………………………………..  
4
4
4
5
Operating the Mower  
Product Specifications………………………………………………………………………………………………………..  
Control Panel Component Identification…………………..…………...…………………………………………………..  
Lawn Mower Component Identification...…………………………………………………………………………………...  
5
6
6
Assembly Instructions…………………………………………………………………………………………….7 through 11  
Starting the Engine………………………………………………………………………………………………………....  
Moving Forward.………………………………………………………………………………………………………………  
Turning the Mower……………………………………………………………………………………………………………  
Stopping the Mower…………………………………………………………………………………………………………..  
Moving in Reverse……………………………………………………………………………………………………………  
Mowing………………………………………………………………………………………………………………………...  
Changing Cut Height..………………………………………………………………………………………………………..  
Removing Blades…………………………………………………………………………………………………………….  
12  
12  
12  
12  
12  
13  
14  
14  
Service and Maintenance  
Maintenance Schedule………………………………………………………………………………………………...……  
Fuel…………………………………………………………………………………………………………………………….  
Engine Oil……………………………………………………………………………………………………………………..  
Air Filter……………………………………………………………………………………………………………………….  
Tire Pressure…………………………………………………………………………………………………………………  
Blades…………………………………………………………………………………………………………………………  
Cleaning the Mower………………………………………………………………………………………………………….  
Lubrication Points…………………………………………………………………………………………………………….  
15  
15  
15  
15  
15  
15  
15  
16  
Adjustments  
Drive Belt Adjustments……………………………………………………………………………………………………….  
Wheel Brake Adjustments…………………………………………………………………………………………………….  
17  
17  
Engine to Blade Belt………………………………………………………………………………………………………….  
Blade to Blade Belt…………………………………………………………………………………………………………..  
Engine to Transmission Belt………………………………………………………………………………………………..  
Safety Interlock System……………………………………………………………………………………………………..  
17  
17  
18  
18  
Troubleshooting Guide……………………………………………………………………………………………………………..  
Warranty……………………………………………………………………………………………………………………………...  
19  
22  
DEK® is exclusively distributed by GXi International, LLC  
3 of 21  
Rev: 8/2008  
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Heavy Duty Power Equipment  
36B, 36BX, 36H, 36HX, 52H, 52HX  
Safety Information and Warnings  
Mower Inspection  
This owner’s manual is considered a permanent part of the lawn  
mower and should remain with the lawn mower if resold. The  
information and specifications included in this publication were  
in effect at the time of approval for printing.  
For your safety, inspect the lawn mower before each use of op-  
eration. In order to inspect your lawn mower, the following condi-  
tions should be met: the lawn mower should be on a flat and level  
surface, with the ignition switch off, key removed, and blades dis-  
engaged. Also the spark plug wire should be off of the spark plug.  
GXi International, LLC, exclusive marketer of DEK Heavy Duty  
Power Equipment, reserves the right to discontinue or change  
specifications or design at any time without notice and without  
incurring any obligation whatsoever. No part of this publication  
may be reproduced without written permission.  
1. Walk around the mower and look for any fluid spills or leaks  
on or underneath the mower. Remove any and all exces-  
sive debris, dirt, and/or fluids.  
2. Look for signs of damage or excessive wear. Check the  
tightness of all nuts, bolts, pins, and screws. Tighten any  
that may be loose and replace any that are missing.  
3. Be sure the safety interlock controls are operating properly  
so that the engine cannot be started unless the ground  
speed control lever is in neutral and the blades are disen-  
gaged.  
4. Check the mower blades for any damage or abnormal wear  
and replace in sets so that they are balanced.  
5. Check the tire pressure on all four tires. See page 15 for  
instructions  
EMISSION CONTROL SYSTEM INFORMATION  
The U.S. and California Clean Air Acts  
EPA and California regulations require all manufacturers to fur-  
nish written instructions describing the operation and mainte-  
nance of emission control systems. The following instructions  
and procedures must be followed in order to keep the emissions  
from your DEK engine within the emission standards.  
SAFETY LABEL LOCATIONS  
These labels warn you of potential hazards that can cause seri-  
ous injury. Read them carefully. If a label comes off or becomes  
hard to read, contact your DEK lawn mower dealer for a re-  
placement.  
6. Check the belts for proper wear and correct tension. See  
pages 17 and 18 for instructions.  
7. Check engine oil and air filters as recommended by the en-  
SAFETY INFORMATION  
Operation of Equipment - Safety Cautions  
DEK lawn mowers are designed to give safe and dependable  
service if operated according to instructions. Read and under-  
stand this owner’s manual before operating your lawn mower.  
WARNING  
DANGER: GASOLINE IS HIGHLY FLAMMABLE AND EXPLO-  
SIVE. Do not add fuel while the engine is running or is hot.  
Keep open flames, sparks, and heat away from the fuel and  
store fuel in containers specifically designed for that purpose.  
ADD FUEL OUTDOORS ONLY AND IF THE FUEL IS SPILLED,  
DO NOT START THE ENGINE. Manually push the mower away  
from the spill and wipe up immediately.  
OPERATOR RESPONSIBILITY  
Know how to stop the lawn mower quickly in case of emer-  
gency. Understand the use of all lawn mower controls, output  
receptacles, and connections. Be sure that anyone who oper-  
ates the lawn mower receives proper instruction. Do not let  
children operate the lawn mower without parental supervision.  
1) Do not operate the engine in a confined space where dangerous carbon  
monoxide fumes can collect. Carbon monoxide is odorless, tasteless,  
and can be fatal.  
2) Mow only in daylight.  
3) Make sure the mower is in neutral and the blades are disengaged be-  
fore attempting to start the engine.  
4) Do not stop or start suddenly when going uphill. Never use riding at-  
tachments on slopes since there is an increase risk that they might roll  
over.  
WARNING  
Do not use your DEK lawn mower to carry passengers. When  
people, especially children, an pets are close by, avoid mowing  
since rotating blades can throw rocks and other items, which can  
cause serious injury.  
5) Avoid steeps slopes and use extreme caution when changing directions  
while operating on a slope.  
Before Using Your DEK Lawn Mower  
CAUTION  
6) Be extremely careful when operating on a slope or when the grass is  
damp or wet. Reduced traction could cause sliding. Never mow by  
pulling the mower back towards you because you might slip.  
7) Watch for traffic when crossing surfaces other than grass (i.e. transport-  
ing) loading a trailer or vehicle, or when the mower is not in use.  
8) Never operate the mower with defective guards, shields, or without the  
safety devices securely mounted in place.  
9) Never direct discharge of material toward bystanders nor allow anyone  
near the mower during operation.  
10) Do not change the governor settings or over speed the engine.  
11) Always stop the engine whenever you leave the mower, even for a  
moment.  
When operating your DEK lawn mower, wear protective clothing  
while mowing. Long pants and safety glasses will help reduce  
the risk of injury from thrown objects. It is recommended that  
adequate footwear, such as steel toe shoes with aggressive  
soles, be worn to help protect your feet and maintain traction on  
slopes or uneven grounds. Always wear hearing protection.  
Inspecting Your Lawn Mowing Area  
12) To help reduce the risk of a fire hazard, keep the engine and the area  
around the engine free of grass, leaves or any other type of foreign  
material.  
13) Beware of cutting edges. Always wear gloves for safety when perform-  
ing blade maintenance activities. Beware on multiple blade units since  
the rotation of one blade may cause the rotation of the other blade.  
14) Do not store or operate the mower with the grass chute deflector in the  
raised position. Serious injury could occur.  
Inspect the area where your DEK lawn mower will be used. Check for  
stones, sticks, wire, and other foreign objects. These objects may  
become projectiles that can cause serious injury and/or death when  
struck by the mower.  
DEK® is exclusively distributed by GXi International, LLC  
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Heavy Duty Power Equipment  
36B, 36BX, 36H, 36HX, 52H, 52HX  
Safety Decals & Product Specifications  
IMPORTANT! The mower belts are adjusted to ensure the blades stop turning within 7 seconds of releasing the  
blade control lever. If you are making any belt adjustments whatsoever, for your safety and the safety of others  
around you, you must ensure the belts are re-adjusted to achieve this design specification.  
Safety Decal Identification  
The labels found below are located on your mower to warn you of potential hazards and provide you with important  
safety information. If these decals become difficult to read or are missing from the mower, please contact your DEK  
mower dealer for a replacement.  
Product Specifications  
Models  
Lawn Mower  
Product Type  
Cutting Width  
Engine  
36B  
Commercial, 0-turn  
36”  
36BX  
Commercial, 0-turn  
36”  
36H  
36HX  
Commercial, 0-turn  
36”  
52H  
Commercial, 0-turn  
52”  
52HX  
Commercial, 0-turn  
52”  
Commercial, 0-turn  
36”  
11hp Honda  
Recoil  
13hp DEK  
13hp Honda  
Recoil  
14hp DEK  
16hp Honda, v-twin  
Electric  
14hp DEK  
Electric  
Engine Start  
Transmission Type  
Manufacturer  
Speeds  
Electric / Recoil  
Gear  
Electric / Recoil  
Hydrostatic  
Hydro-Gear  
Variable  
Gear  
Hydrostatic  
Hydro-Gear  
Variable  
Hydrostatic  
Hydro-Gear  
Variable  
Hydrostatic  
Hydro-Gear  
Variable  
Peerless  
Peerless  
5 forward/1 reverse  
5 forward/1 reverse  
Floating,  
quick change  
Floating,  
quick change  
Floating,  
quick change  
Floating,  
quick change  
Floating,  
quick change  
Floating,  
quick change  
Deck Type  
1.5”- 4.5”  
½” increments  
1.5”- 4.5”  
½” increments  
1.5”- 4.5”  
½” increments  
1.5”- 4.5”  
½” increments  
1.5”- 4.5”  
½” increments  
1.5”- 4.5”  
½” increments  
Cutting Height  
Blade Engagement  
Blade Tip Speed  
Anti-Scalping Rollers  
No. Blades/ Length  
Control System  
Manual clutch  
18,750 ft/min  
None  
Manual clutch  
18,750 ft/min  
None  
Manual clutch  
18,750 ft/min  
None  
Manual clutch  
18,750 ft/min  
None  
Manual clutch  
18,750 ft/min  
3 front/2 rear  
3/18”  
Manual clutch  
18,500 ft/min  
3 front/2 rear  
3/18”  
2/18”  
2/18”  
2/18”  
2/18”  
Pistol Grip  
Gasoline/4.5 gals.  
Pistol Grip  
Gasoline/4.5 gals.  
EZ Lever  
EZ Lever  
EZ Lever  
EZ Lever  
Fuel/Capacity  
Gasoline/4.5 gals.  
Gasoline/4.5 gals.  
Gasoline/4.5 gals.  
Gasoline/4.5 gals.  
13” X 6.5”  
turf tread  
13” X 6.5”  
turf tread  
16” X 6.5”  
turf tread  
16” X 6.5”  
turf tread  
18” X 8.5”  
turf tread  
18” X 8.5”  
turf tread  
Rear Drive Tires  
9” X 3.5”  
smooth tread  
9” X 3.5”  
smooth tread  
9” X 3.5”  
smooth tread  
9” X 3.5”  
smooth tread  
9” X 3.5”  
smooth tread  
9” X 3.5”  
smooth tread  
Front Caster Tires  
Brake System  
Hydraulic service/  
Hydraulic service/  
Hydraulic service/  
Hydraulic service/  
6” band brakes  
6” band brakes  
manual parking break manual parking break manual parking break manual parking break  
Weight  
Approx. 450 lbs.  
45” x 72”  
Approx. 450 lbs.  
45” x 72”  
Approx. 450 lbs.  
45” x 72”  
Approx. 450 lbs.  
45” x 72”  
Approx. 510 lbs.  
45” x 72”  
Approx. 510 lbs.  
45” x 72”  
Height/Length  
DEK® is exclusively distributed by GXi International, LLC  
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Heavy Duty Power Equipment  
36B, 36BX, 36H, 36HX, 52H, 52HX  
Control Panel and Lawn Mower Components  
Control Panel Identification  
Throughout this manual, instructions are given on the operation of your DEK mower. We recommend that while going  
through this manual, you have your mower available for quick and easy access in order to orient yourself with the con-  
trols, maintenance, and orientation of different parts. Please read through the manual before operating.  
Below, you will find a diagram of the control panel. Please take the time to familiarize yourself with the mower controls.  
Gear Drive Models  
Hydro Drive Models  
Blade Control Lever  
Brake  
Operator Presence Controls  
Throttle/Choke Control  
Key Switch  
Forward / reverse speed control  
Gear Shift Lever  
Lawn Mower Feature Identification (some features may appear different than shown, depending on the model)  
“Operator present” safety switches  
Blade control lever  
Fuel tank  
Hydro brake / lock  
(hydro models only)  
Pulley guard  
Control panel  
Handle bar height adjustment  
Muffler (HOT!)  
Height adjustment pins (4)  
Side discharge chute  
Scalping wheels  
Hydro Drive Models  
Hydro system by-pass release pins allow the wheels to spin  
freely (pull out and detent two pins for free wheeling).  
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Heavy Duty Power Equipment  
36B, 36BX, 36H, 36HX, 52H, 52HX  
Assembly Instructions  
Step 1: Front Wheel Assembly  
Note: some mowers may be shipped with the front wheels  
pre-assembled.  
A) Remove packaging materials surrounding the front  
wheels and remove the bolt threaded into the front  
wheel. Retain this bolt and washer for future use.  
B) Unscrew the fastener holding the bolt to the steel ship-  
ping rack. Set the nut and bolt aside. It will be re-used  
in the mower assembly process.  
C) Remove the mower from the steel shipping rack.  
D) Slide the front wheel pivot shaft through the sleeve. If  
the fit is tight, apply some grease to the pivot shaft.  
E) Secure the shaft in place with the bolt and hardware that  
were provided with the wheel.  
F) Repeat steps A through E for the second front wheel.  
G) Apply grease to the front wheel sleeve grease fittings  
when complete.  
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Heavy Duty Power Equipment  
36B, 36BX, 36H, 36HX, 52H, 52HX  
Assembly Instructions  
Step 2(a): Assembly Instructions for Mowers with Hydraulic Drive Systems (36H, 36HX, 52H, 52HX)  
1) Attach handle bars using the upper hole position  
setting if you are walking behind the mower (not using a  
ride-on Sulky). By using this hole position, the handle  
bars are several inches lower. Use the lower hole posi-  
tion if you are planning on using a ride-along sulky, rais-  
ing the handle bar location by several inches. These  
hole positions can also be used for adjusting the handle  
bar location for operators with different heights and arm  
lengths. Select the height that is most comfortable for  
you.  
2) Reconnect the 4 connecting rods from the control  
panel to the chassis pivot points as per the attached pic-  
tures. The rod connections are secured with an initial  
preset for the upper hole position (lower handle bar posi-  
tion). If the lower hole position (upper handle bar posi-  
tion) is used the rod connections must be adjusted.  
3) Retighten the pivot bolts on the triangular plates on  
each side of the gas tank support bracket (2 locations,  
one on each side of the mower).  
4) Should the pivot ends on the connecting rods be ro-  
tated during assembly, minor adjustments may be re-  
quired to achieve full travel on each control handle. The  
control handles located directly on top of the handle bars  
should have full travel forward and stop approximately  
1/8” before the “V plate” strikes the handle bar. This will  
provide full forward speed and the correct restricted  
speed in reverse. Please make any minor adjustments  
to the position of the threaded connecting rod attachment  
1/8” gap in full forward  
position  
V-Plates  
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Heavy Duty Power Equipment  
36B, 36BX, 36H, 36HX, 52H, 52HX  
Assembly Instructions  
Step 2(b): Assembly Instructions for Mowers with Belt Drive System (36B, 36BX)  
1) Attach the handle bars using 2 bolts on each side of the fuel  
tank bracket. Select the desired hole locations to adjust for  
the handle bar height. For lower handle bars, use the top  
hole location as shown in the diagram. For higher handle  
bars, use the lower hole location  
Hole location for higher handle bar positioning  
2) Attach the clutch / brake control rods to the clutch brake as-  
sembly on each side of the mower. Adjust for desired level of  
sensitivity by turning the threaded lug on the rod. The adjust-  
ment may take a few attempts to achieve: equal balance be-  
tween the two break handles so they feel the same; easy  
disengagement from the parking break detent built into the  
pistol grip handle; and full contact with the brake when the  
handle is retracted (see page 17 for more adjustment details).  
Threaded  
blade activa-  
tion control  
rod.  
3) Unfasten the blade activation rod from the control handle,  
insert it through the hole on the chassis of the mower, and  
attach the rod to the blade activation cam assembly as per the  
adjacent photo. Ensure the cam is positioned in the “9 O’  
clock” position when attaching the rod to accomplish the cor-  
rect rod travel. Once the rod is attached to the cam, re-attach  
the other rod end to the control handle again. For correct rod  
adjustment, you want to maintain the “9 O’ clock” position of  
the cam with the blade activation control knob in the full “off”  
position. Turn the threaded rod until it achieves the correct  
cam positioning.  
9 O’ Clock cam  
position when con-  
necting the rod with  
the control handle  
in the “off” position  
achieves the cor-  
rect adjustment  
4) Attach the gear shift lever by inserting  
it through the slot in the fuel tank bracket  
and attaching it to the gear shifter bolt on  
the transmission. Tighten the bolt se-  
curely. Feed the handle assembly  
through the slot from the engine side of  
the fuel tank bracket.  
Fuel tank bracket  
Gear shift lever  
Retaining nut attached to gear shift bolt  
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Heavy Duty Power Equipment  
36B, 36BX, 36H, 36HX, 52H, 52HX  
Assembly Instructions  
Step 3: Wire Harness Assembly and Connections  
For 52” Models  
There are a total of 4 connections to connect the pre-wired han-  
dle bar assembly. Route the wire harness as shown on the  
adjacent photo and make the following connections:  
1. The smaller, white, 2-pin connector is routed through a hole  
in the chassis and is connected to the blade activation  
safety switch 2-pin connector.  
1
3
2. The larger, white, 5-pin connector is connected to the mat-  
ing connector at the rear of the Honda engine.  
3. The black wire is connected to a ground lug located on the  
back of the Honda engine.  
4. The yellow wire is attached to the bottom of the starter mo-  
tor solenoid on the Honda engine.  
In addition, the battery terminal wires must be connected to  
provide power to the electric starter. Attach the red and black  
battery terminal wires to the battery.  
Once all connections are made, the wire harness can be  
strapped into place permanently to the handle bars and chassis  
using the black wire-ties provided.  
4
For 36” Models  
2
The 36” models have the following connections:  
1. The 36” hydro drive model has the same as “connection  
1” for the 52” models discussed above, connecting the  
blade activation safety switch located underneath the front  
of the chassis. The wire harness is routed through a hole  
in the chassis as per the above diagrams.  
36” belt drive  
blade activation  
safety switch  
location top  
view.  
2. For the belt drive 36” models, connect the blade activation  
safety switch located on the back of the chassis. It is a  
two pin connector coming from a black switch box under  
the fuel tank bracket. See adjacent photo.  
3. There are 2 engine connections from the wire harness. A  
black wire that is attached to a ground lug on the engine  
and a red wire connector that is attached to the red wire  
crimp connector located at the rear of the Honda engine.  
The crimp on connector is typically covered with a green  
plastic sleeve. The red wire is the engine kill switch wire.  
Black ground  
wire for Honda  
engine.  
Once all connections are made, the wire harness can be  
strapped into place permanently to the handle bars and chassis  
using the black wire-ties provided.  
Red wire with  
crimp connec-  
tors and typi-  
cally a green  
plastic cover.  
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Heavy Duty Power Equipment  
36B, 36BX, 36H, 36HX, 52H, 52HX  
Assembly Instructions  
Throttle  
cable  
clamp  
Step 4: Throttle and Choke Cable Connections  
On the 36” Honda powered models, there is one cable that func-  
tions as a throttle cable, a choke activation cable, and operates a kill  
switch. It is important that the cable be positioned correctly in the  
connector to permit all three functions.  
The throttle cable connector is located at the rear corner of the en-  
gine. Insert the throttle cable into the lower of the two holes, insert  
the cable into the cable clamp directly above the holes. Adjust the  
throttle cable positioning in the clamp to allow the choke lever to  
activate when the throttle on the control panel is on the top position.  
To make this adjustment you may be required to secure and tighten  
the cable clamp a few times as you adjust the cable positioning and  
test for choke activation.  
On the 52 Hydro models powered by Honda there are separate  
throttle and choke cables. Both are connected in the front center of  
the engine. The throttle cable is connected to the top lever in the  
front hole. The choke cable is connected to the lower lever. See  
attached picture. Ensure that the cables are clamped to provide full  
travel for the levers on the control panel.  
Choke lever motion  
Right: 52” Mower Throttle  
and Choke Connections  
Throttle cable clamp  
Throttle cable connection  
Choke cable clamp  
Above: 36” Honda Mower Throttle  
and Choke Connection  
Choke cable connection  
Step 5: Fuel tank connections  
WARNING: FUEL LEAKS OR A LOOSE FUEL TANK OR A  
LOOSE FUEL VALVE CAN LEAD TO SEVERE INJURY OR  
DEATH. ENSURE ALL CONNECTIONS ARE SECURE AND IN-  
SPECT THOROUGHLY FOR ANY POTETIAL LEAKS IN THE  
FUEL SYSTEM. IF YOU FIND A LOOSE CONNECTION OR A  
LEAK, MAKE AN IMMEDIATE REPAIR OR ASK FOR ASSI-  
TANCE FROM A PROFESSIONAL MECHANIC OR SERVICE  
CENTER.  
DO NOT OPERATE THIS LAWN MOWER IF ANY COMPONENT  
OF THE FUEL SYSTEM IS LOOSE OR LEAKS GASOLINE!  
Locate the fuel tank on the fuel tank bracket and align the fuel valve  
in the center of the clearance hole. Place the fuel tank straps into  
position, wrapping them around the tank and the bracket. Note: the  
36B model has slots for the straps to feed through. Once the fuel  
tank and straps are in place, securely tighten the straps using the  
bolts provided. Once secure, firmly attach the fuel line to the fuel  
valve nipple. Ensure all connections are firm and secure. Tighten  
as required to make sure the fuel system is tightly attached.  
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Rev: 8/2008  
Heavy Duty Power Equipment  
36B, 36BX, 36H, 36HX, 52H, 52HX  
Operating Instructions  
Starting the Engine  
Going Forward (belt drive models):  
1. With your hand (or your knee as you become more profi-  
cient), move the gear shift lever to the desired speed with at  
least one operator presence switch held down. “1” is slow  
WARNING  
DANGER: DO NOT OPERATE THE ENGINE IN A CONFINED  
SPACE WHERE DANGEROUS CARBON MONOXIDE FUMES  
CAN COLLECT. CARBON DIOXIDE IS ODORLESS, TASTE-  
LESS AND CAN BE FATAL.  
2. Disengage the parking brake de-  
tent levers using your thumbs  
while pushing down and holding  
the operator presence control  
levers on the handle grips and  
squeezing the hand brake lever.  
(Figure 4).  
NOTE: Check to make sure you have added fresh unleaded gasoline  
and filled the engine with SAE 5W30 motor oil before starting your  
mower.  
Figure 4  
1. Check to make sure the  
shut off valve, located at  
the bottom of the tank is in  
the “ON” position.  
3. Slowly and evenly, release the hand brake levers simultaneously  
and the mower will start moving forward. NOTE: If the operator  
lets go of both operator presence control levers “A” while  
either the blade control lever is in the “ON” and/or the gear  
shift control lever is out of the neutral position, and safety  
interlock system will stop the engine. To restart the mower,  
reset all controls to the “OFF” position and neutral “N” posi-  
tion.  
(Figure 1)  
Note: there is also an fuel  
valve on the carburetor of the  
Honda powered 36” mowers.  
Figure 1  
To Turn the Mower (for belt drive models)  
2. Check to make sure the  
brake is set. (Figure 2)  
In order to turn your DEK mower in the desired direction, gently  
squeeze the side’s traction control (brake / clutch lever) lever that  
corresponds with the direction in which you would like to turn. The  
Figure 2a) Belt drive models 2b) Hydro models  
To Stop the Mower (for belt drive mowers)  
3. Check to make sure the  
gear shift lever is in the  
neutral position. The lever  
should be on “N” - belt  
drive model only. There  
is a safety switch that pre-  
vents the mower from  
In order to stop your DEK mower, gently and evenly squeeze up on  
both of the traction control levers (brake / clutch levers) until the  
mower comes to a complete stop. Then, using your thumbs, push  
down on the traction lever locks “B” until the levers are securely  
locked in the neutral position. While still holding down with one  
hand the operator presence controls, move the gear shift lever to  
the “N” position with the other hand) or your knee as you become  
more proficient). When leaving from behind the mower, disengage  
the blades, shut the engine off, and remove the key.  
starting when in gear. If  
the lever is not firmly on  
the “N” the engine will not  
start.  
(Figure 3)  
Figure 3  
To Reverse the Mower (for belt drive mowers)  
1. Slowly and evenly squeeze up on both control levers until the  
mower comes to a complete stop. Then, with your thumbs,  
push down on the brake locks until the levers are securely  
locked.  
2. While still holding down the operator presence control with  
one hand, use the other hand and pull the blade control lever  
to the “OFF” position — turning the blades off.  
3. Shift the gear shift lever to the reverse “R” position.  
4. Release the brake control lever locks by squeezing both  
traction control levers as much as needed while at the same  
time, applying forward pressure on the brake control lever  
locks with your thumbs.  
5. Slowly and evenly, let both traction control (brake / clutch)  
levers down simultaneously and the mower will start to go in  
reverse. Always use extreme caution when moving the  
mower backwards and never move the mower downhill  
backwards.  
4. Make sure that the blade control lever is in the “OFF” position.  
NOTE: The safety interlock system will prevent the engine  
from being started if the blade control lever is not in the  
“OFF” position and the gear shift lever is not in the neutral  
“N” position.  
5. Slide the engine speed control to the top position or to “CHOKE”  
if the engine is cold (some models have a separate choke lever  
to pull out).  
6. Turn the key clockwise to the “Start” position for electric start  
models or “On” for pull start models.  
7. Slowly pull the start cord on the engine until just past compres-  
sion. STOP! Return the start cord and then pull firmly with a  
smooth, steady motion to start the engine.  
8. When the engine starts to run, slowly return the engine speed  
control out of “CHOKE” to the desired engine speed (or push  
choke lever “off” on some models).  
6. To stop the mower, slowly and evenly squeeze on both control  
levers until the mower comes to a complete stop, and then  
with your thumbs, push down on the brake lever locks until the  
levers are securely locked. Return the gear shift lever to neu-  
tral “N”.  
CAUTION  
Before attempting to use your DEK mower, please make sure you  
are familiar with all of the components and have read the manual.  
DEK® is exclusively distributed by GXi International, LLC  
Download from Www.Somanual1s.2coomf. A2l1l Manuals Search And Download.  
Rev: 8/2008  
Heavy Duty Power Equipment  
36B, 36BX, 36H, 36HX, 52H, 52HX  
CAUTION  
Before attempting to use your DEK mower, please make sure you  
are familiar with all of the components and have read the manual.  
Operating the Mower (hydro drive models):  
Hydro by-  
pass levers  
Figure 5  
1. Make sure the brake has  
been moved to the “OFF  
Position. (Figure 3)  
NOTE: The safety interlock system will prevent the engine  
from being started if the blade control lever is not in the  
“OFF” position  
Figure 3  
Mowing Grass with Your DEK Lawn Mower  
WARNING  
2. Push down and hold the  
operator presence control  
levers “A” on the handle bar  
with both hands (Figure 4).  
DANGER: Thoroughly inspect the area where the equipment is to  
be used. Look for items such as stones, sticks , wire, and other  
foreign objects. When struck by the mower, these and other ob-  
jects may become projectiles that could lead to serious injury and  
or death. Clear area of all debris and keep people and pets away.  
3. The forward and reverse  
levers (“B” and “C”) are  
spring loaded to the neutral  
position.  
Figure 4  
4. To drive the mower forward, slide both hands slightly back on  
the handle bar and gently squeeze the forward levers “B”  
toward the handle bar. The mower will move forward. The  
forward speed will be directly proportional to the degree of  
movement of these forward levers toward the handle bar.  
5. To turn the mower left, either release some pressure on the  
left lever (reduces the speed of the left wheel) increase the  
pressure of the right lever (increases the speed of the right  
wheel) or both. The degree of the turn will be directly propor-  
tional to the amount of movement of these levers.  
DANGER: DO NOT OPERATE THE MOWER WITH DEFECTIVE  
GUARDS, SHIELDS, OR WITHOUT THE SAFETY DEVICES  
SECURELY IN PLACE.  
WARNING: THIS MOWER IS DESIGNED SO THE BLADES  
WILL COME TO A COMPLETE STOP WITHIN 7 SECONDS OF  
THE BLADE CONTROL LEVER BEING PLACED IN THE “OFF”  
POSITION. FOR YOUR SAFETY, PLEASE ENSURE IF THE  
BELTS WERE ADJUSTED IN ANY WAY, THAT THE BELT  
TENSIONS ARE RE-CALIBRATED TO MEET THIS SPECIFICA-  
TION.  
6. To turn the mower right, simply perform the functions de-  
scribed in instruction 5 with the opposite levers.  
7. To stop the forward motion of the mower, release the forward  
levers. The spring loaded feature of the hydrostatic drive  
units will return the levers to the neutral position and stop the  
mower.  
8. To drive the mower backwards, slide both hands slightly for-  
ward on the handle bar and gently squeeze the reverse lev-  
ers “C” toward the handle bar.  
9. When in the neutral position, the hydraulic system will prevent  
the mower from moving easily. However, on a grade, the  
mower can drive very slowly (with the engine off or running).  
The manual parking brake should be “set” any time the  
mower is left unattended or is being transported.  
10. To physically move the mower when the engine is NOT run-  
ning, the hydrostatic drive units will need to be disengaged  
(bypassed). To bypass these hydro units, pull the two levers  
below the rear of the chassis (Figure 5) through the holes and  
slide them in the slots provided. This will allow the hydraulic  
fluid to bypass the drive wheels and allow the drive wheels to  
move freely.  
1. When the mower is in position on the area to be mowed,  
hold down with one hand the operator presence control.  
2. With the other hand, SLOWLY push the blade control  
lever forward to the “ON” position.  
3. Belt drive models—Move the gear shift lever to the de-  
sired speed. Always begin at a slow ground speed and  
increase only as the condition of the terrain warrants. To  
stop mowing, slowly and evenly squeeze up on both trac-  
tion control levers until the mower comes to a complete  
stop and then with your thumbs, push down on the trac-  
tion lever locks until the levers are securely locked in the  
neutral position. Return the gear shift lever to the neutral  
“N” position  
4. Hydro drive models—Slowly, and evenly, engage the  
forward and reverse levers and begin mowing. To stop  
moving, ease up on the levers or simply let go of the  
mower.  
5. To stop the blades, pull the blade control lever back to  
the “OFF” position. Warning—the blades may take up  
to 7 seconds to stop turning.  
NOTE: Release the bypass levers when the desired mower move-  
ment is complete to reengage the hydro drive units. To release  
thee levers, simply slide the slots to the hole and they will auto-  
matically return to their normal closed position.  
The Soft Start feature is critical to maintaining belt, clutch, and  
engine life. NEVER “slam” the blade on/off handle from off to  
on without pausing an adequate time in the soft start range.  
DEK® is exclusively distributed by GXi International, LLC  
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Rev: 8/2008  
Heavy Duty Power Equipment  
36B, 36BX, 36H, 36HX, 52H, 52HX  
Mowing and Floating Deck Instructions  
3. Raise or lower the deck  
until the hole in the  
Changing the Height of Cut  
Your DEK mower is equipped with an easily adjustable floating  
deck which can be adjusted for cut heights of 1½” to 4½” in ½”  
increments.  
height adjust bar (Figure  
9A) aligns with the de-  
sired cut height hole on  
the height adjust bracket  
(Figure 9B).  
4. Replace the height adjust  
pins into the desired cut  
height holes. All 4 height  
adjust pins must be set to  
the same desired cut  
height position.  
Figure 9A  
Figure 6  
5. Repeat the same adjust-  
ment process with the  
two height adjust pins /  
brackets on the other  
How to Change the Cut Height  
side of the mower deck.  
1. Hold one side of the deck by the black handle provided  
(Figure 7).  
Figure 9B  
Removing the Blades  
CAUTION  
Beware of the cutting edges on the blades. The rotation of one  
blade may cause the other blade(s) to rotate. Always wear work  
gloves when handling blades.  
Figure 7  
1. Park the mower and level ground and block the rear wheels to  
prevent accidental rollback.  
2. Raise the front end of the mower using a jack stand.  
3. Using two 15/16” box end wrenches. Use one wrench to loosen  
nut “A” while holding bolt “C” with the other wrench. (Figure 10)  
4. Slide the blade bolt down through the mower deck and out.  
5. To reinstall, reinsert the blade bolt through the cutting deck.  
6. Install the blade spacers  
2. Using your other hand, remove the retaining clip and pin  
from the two brackets on that side of the mower. (Figure 8).  
that were removed,  
back onto the blade bolt  
followed by the nut and  
tighten. (Figure 10)  
IMPORTANT: The  
amount of spacers  
should always be the  
same on each blade  
bolt. Never put the  
spacers below the  
blade.  
A
C
Figure 8  
Figure 10  
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Rev: 8/2008  
Heavy Duty Power Equipment  
36B, 36BX, 36H, 36HX, 52H, 52HX  
General Maintenance  
Fuel  
Maintenance  
The Importance of Maintenance  
WARNING  
Good maintenance is essential for your DEK lawn mower for  
upkeep of safety and quality.  
DANGER: Gasoline is highly flammable and explosive. Do not add  
fuel while the engine is running or is hot. Keep open flames, sparks,  
and heat away from the fuel and store fuel in containers specifically  
designed for that purpose. Add fuel outdoors only and if the fuel is  
spilled, do not start the engine. Manually push the mower away  
from the spill and wipe up immediately.  
To help you properly care for your lawn mower, the following  
pages include a maintenance schedule, routine inspection proce-  
dures, and simple maintenance procedures using basic hand  
tools. Maintenance is the responsibility of the owner and must  
be performed regularly. Other service tasks that are more diffi-  
cult, or require special tools, are best handled by professionals  
and are normally performed by a DEK technician or other quali-  
fied mechanic.  
Refer to the Engine Owner’s Manual for the type of fuel to use.  
A fuel shut off valve is located on the bottom of the fuel tank. (Figure  
1, page 7). It is recommended that the fuel be shut off when transport-  
ing between job sites and when storing the mower for the extended  
periods of time.  
The maintenance schedule applies to normal operating condi-  
tions. If you operate your lawn mower under severe conditions,  
such as sustained prolonged use or high-temperature opera-  
tions, or use it in unusually wet, dusty or rocky conditions, con-  
sult your servicing dealer for recommendations applicable to your  
individual needs and use.  
Engine Oil  
CHECK ENGINE OIL BEFORE EACH USE. Refer to the Engine  
Owner’s Manual for the type of oil, oil change intervals, and the proper  
procedures to check and change oil.  
Please be sure to use genuine DEK mower replacement parts  
when servicing your mower to assure the best quality, safety and  
performance for your mower.  
Air Filter  
Refer to the Engine Owner’s Manual for the recommended maintenance.  
WARNING  
DANGER: Before making any adjustments and/or servicing to  
your DEK Mower, make sure the mower is on level ground,  
blades disengaged, key removed, and the engine off with the  
spark plug wire(s) removed from the spark plug(s) to prevent  
accidental contact. If adjustment or maintenance is being  
performed after operation of the mower, allow the unit to cool  
since heat build up could cause severe burns.  
Tire Pressure  
The recommended tire pressure for all four wheels is 28 PSI. Incorrect  
tire pressure may cause the mower to pull to one side and/or uneven cut.  
Always use caution when filling the tire and never exceed the recom-  
mended tire pressure.  
Blades  
Maintenance Schedule  
WARNING  
Time Interval  
Break-in  
(first 5 hrs)  
Every  
8 hrs  
(daily)  
Every  
40 hrs  
(weekly)  
Every  
100 hrs  
(Bi-weekly)  
Every  
200 hrs  
(monthly)  
Item  
Procedure  
DANGER: Before working on the blades, make sure the engine is  
off, key removed, and the spark plug(s) wires removed from the  
spark plug(s) to prevent accidental contact.  
Belts  
Inspect (adjust if  
needed)  
X
X
X
Blades  
Inspect and  
Sharpen  
CAUTION  
Engine Air Filter  
Inspect (see Engine  
Owner’s Manual)  
X
Beware of the cutting edges on the blades. Always wear work  
gloves when performing blade maintenance.  
Engine Cooling  
Areas  
Clean (see Engine  
Owner’s Manual)  
X
Engine Oil  
Check (see Engine  
Owner’s Manual)  
X
Blades should be inspected on a daily basis for nicks, bends, and/or ex-  
cessive wear. If the blades are worn, cracked, bent, or damaged, replace  
immediately before using the mower. Use only genuine DEK lawn mower  
replacement blades when changing blades to ensure quality and perform-  
ance.  
Change (see Engine  
Owner’s Manual)  
X
X
X
Engine Oil Filter  
Change (see Engine  
Owner’s Manual)  
X
X
Engine Spark Plug Inspect (see Engine  
Owner’s Manual)  
Fuel Filter  
Fuel Line  
Replace  
Check  
X
X
To remove blades, refer to page 14, section “Removing the Blades.”  
When sharpening the blades, sharpen only the cutting edges and try to  
maintain the original angle of the blade. Do not make the cutting edge  
razor sharp. Remove the same amount from each side of the blade so  
that balance in maintained.  
Grease Fittings  
Hardware  
Refer to page 16  
Check for proper  
tightness  
X
X
X
Mower Main  
Frame  
Remove debris  
from under belt  
cover  
X
X
Cleaning the Mower  
Safety Interlock  
System  
Check Operations  
and Switches  
It is recommended that the DEK lawn mower be cleaned on a daily basis.  
Excessive accumulation of dirt, debris, oil, etc. causes premature wear on  
the components and may present a potential safety hazard.  
Tires  
Check Air Pres-  
sure  
DEK® is exclusively distributed by GXi International, LLC  
Download from Www.Somanual1s.5coomf. A2l1l Manuals Search And Download.  
Rev: 8/2008  
Heavy Duty Power Equipment  
36B, 36BX, 36H, 36HX, 52H, 52HX  
Lubrication Points  
To assure proper lubrication on moving parts, it is recommended that you lubricate the following components with a high-quality EP2 high  
temperature based grease or equivalent. Should the conditions of operation be more severe than normal, the lubrication interval may be  
shorter than recommended. GTR/OPE grease is the recommended lubricant.  
Lubrication point locations  
36” belt drive mowers have 13 lubrication points  
36” hydraulic drive mowers have 8 lubrication points  
52” mowers have 10 lubrication points  
Lubricate after every 50 hours of usage  
1. Front wheel shafts (2 locations, one on each wheel  
shaft)  
2. Spindles (2 locations for 36” and 3 locations on 52”  
mower decks). Note: the lower spindle bearing is  
sealed on the bottom and open on the top. The up-  
per spindle bearing is sealed on both sides. Failure  
to frequently replenish grease will cause premature  
lower bearing failure. Frequent application of  
grease to this bearing is critical to achieving long  
spindle life in harsh duty environments.  
3. Mower deck idler pulley brackets (1 location for 36” and  
2 locations on 52”)  
4. Blade activation rod supports (2 locations: one at the  
support under the fuel tank bracket and one adjacent to  
the engine.)  
5. Hydraulic drive system idler puller support (1 location on  
hydro drive models only)  
6. Belt drive system (6 locations: 2 locations on belt pulley  
supports on each side of the mower; 2 on the couplings  
between the transmission and the drive  
shafts.  
DEK® is exclusively distributed by GXi International, LLC  
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Rev: 8/2008  
Heavy Duty Power Equipment  
36B, 36BX, 36H, 36HX, 52H, 52HX  
Engine to Blade Belt Adjustment:  
Service Adjustments  
WARNING  
DANGER: Before making any adjustments and/or servicing your  
lawn mower, make sure the lawn mower is on level ground,  
blades disengaged, key removed, and the engine off with the  
spark plug wire(s) removed from the spark plug(s) to prevent ac-  
cidental contact. If adjustments or maintenance is being per-  
formed after operation of the lawn mower, allow the unit to cool  
since heat build up could cause severe burns.  
1. Remove the deck cover and move the blade control lever  
on the control console to the “ON” position.  
2. With approximately 10 lbs of pressure being applied on  
the engine to blade belt midway between with pulleys,  
the belt should move approximately ½”.  
3. If the belt moves more than ½”, move the blade control  
lever back to the “OFF” position.  
4. Loosen locking nut “X”.  
Drive Belt and Brake Adjustment, 36B and BX Models:  
5. Rotate turnbuckle “Y” until desired tension is achieved.  
6. Tighten locking nut “A” when finished  
7. Replace deck cover.  
To adjust the actuation of the brake and the drive belt, there are  
two adjustable “swivels” attached to threaded rods in the belt /  
clutch / brake assembly.  
The objectives of fine tuning the adjustment are to:  
1. Equalize the “feel” and action between pistol grips on each  
side of the mower.  
2. Achieve desired belt slippage with approximately 50% to 75%  
travel of the handle bar grips.  
3. Achieve brake activation during the last 50% travel of the han-  
dle grips.  
4. Achieve locked brakes when the handle bar grips are locked in  
the “parking brake position.”  
Y
The upper swivel adjusts primarily the belt slippage on the pulley.  
To adjust the belt slippage, place the mower in 1st gear and move  
until locked in gear. Remove the retaining pin (A) and the washer.  
Pull the swivel out of the hole. Rotate the swivel in the desired  
direction on the threaded rod to achieve the desired feel and mo-  
tion. Place the swivel back into the hole. Reconnect the pin and  
washer. Test the belt slippage action of the controls by squeezing  
the pistol grip lever. Continue adjusting until you have achieve the  
desired feel. Once complete with one side, perform the identical  
adjustments to the other side.  
X
IMPORTANT! The mower belts are adjusted to ensure  
the blades stop turning within 7 seconds of releasing the  
blade control lever. If you are making any belt adjust-  
ments whatsoever, for your safety and the safety of oth-  
ers around you, you must ensure the belts are re-  
adjusted to achieve this design specification.  
To adjust the brake activation, start by releasing the parking brake  
and leave the handle bar grip in a neutral position. Remove retain-  
ing clip (B) and washer. Rotate the swivel in the desired direction  
on the threaded rod to achieve the desired brake activation position  
and feel. Place the swivel back into the hole. Reconnect the pin  
and washer. Test the belt slippage action of the controls by  
squeezing the pistol grip lever. Continue adjusting until you have  
achieve the desired feel. Once complete with one side, perform  
the identical adjustments to the other side.  
52” Blade to Blade Belt Adjustment:  
1. Remove the deck cover.  
A
N
2. With approximately 10  
lbs of pressure being  
applied on the blade to  
blade belt, midway be-  
tween the pulleys, the  
belt should move ap-  
proximately ½”.  
M
3. If the belt moves more  
than ½”, Loosen locking  
nut “M” and turn nut “N”  
clockwise approximately  
1-2 turn.  
B
Figure 16  
4. Recheck the tension on the blade to blade belt. If it is  
still loose repeat step 3. Important: Do not over tighten  
the blade to blade belt. Over tension can cause prema-  
ture wear on belts and blade spindles.  
5. Re-tighten locking nut “M.”  
6. Replace deck cover.  
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Rev: 8/2008  
Heavy Duty Power Equipment  
36B, 36BX, 36H, 36HX, 52H, 52HX  
Service Adjustments  
Engine to Transmission Belt Adjustment  
Belt Drive System  
Safety System Adjustments (See Figure 18)  
1. The engine to transmission belt, located underneath the  
rear deck, should move 3/16” with 5 lbs. of pressure ap-  
plied midway on the belt between the transmission pulley  
and the engine output shaft pulley.  
2. To adjust the belt, loosen nut “A” on idler pulley “B”.  
3. Slide idler pulley “B” to tighten or loosen and secure in  
place by tightening nut “A”.  
WARNING  
DANGER: Do not bypass, modify, alter, or disconnect the  
safety system. Make sure that the safety interlock system is  
fully operational each time before mowing. Failure to do so  
could present danger to you and others around you.  
There are generally 3 ways to adjust the sensitivity of a safety  
switch. The most appropriate way for to adjust each switch will  
depend upon the application, location, and the nature of the prob-  
lem you are encountering.  
Method 1—adjust location using the mounting screws  
1. Move the blade control lever to “OFF”.  
2. Loosen screws “A” until safety switch “B” moves freely.  
3. Slide safety switch “B” firmly against blade bellcrank “C”.  
4. Tighten screws “A” and check that safety switch “B” does not  
move.  
A
Method 2—adjust location using adjustment nuts on switch body.  
1. Loosen locking nut “C” on the sensor shaft.  
2. Adjust switch location by turning the nuts.  
3. Tighten the locking nut when proper adjustment is achieved.  
B
Method 3—relocate mounting holes.  
In rare instances whereby the components are mis-aligned, the  
easiest means of adjusting the location is to elongate the existing  
holes or add new holes that achieve a tighter fit between the acti-  
vation rod and the sensor.  
Figure 17  
Hydro Drive System  
1. The engine to transmission belt, located underneath the  
rear deck, should move 3/16” with 5 lbs. of pressure ap-  
plied midway on the belt between the transmission pulley  
and the engine output shaft pulley.  
A
C
2. To adjust the belt, turn nut “C” on the threaded tension  
rod found on the right, rear corner of the mower.  
3. Do not over-tighten. This could cause serious damage to  
the hydraulic drive systems.  
B
C
Figure 18  
IMPORTANT! The mower belts are adjusted to ensure  
the blades stop turning within 7 seconds of releasing the  
blade control lever. If you are making any belt adjust-  
ments whatsoever, for your safety and the safety of oth-  
ers around you, you must ensure the belts are re-  
adjusted to achieve this design specification.  
DEK® is exclusively distributed by GXi International, LLC  
Download from Www.Somanual1s.8coomf. A2l1l Manuals Search And Download.  
Rev: 8/2008  
Heavy Duty Power Equipment  
36B, 36BX, 36H, 36HX, 52H, 52HX  
Troubleshooting  
Problem  
Possible Causes  
Solution  
Engine will not start  
1. Key is in the off position  
2. Insufficient fuel in the tank  
3. Air bubble in the fuel line  
4. Fuel valve in OFF position  
5. Choke not ON  
1. Turn key to ON position  
2. Add gasoline  
3. Prime engine or shake bubble out  
4. Turn valve ON  
5. Turn choke on  
6. Choke linkage is out of adjustment  
7. Low engine oil  
6. Adjust choke linkage (p. 11)  
7. Add engine oil  
8. Blade control is in the ON position  
9. Transmission is in gear (belt drive  
model).  
8. Push lever to OFF position  
9. Slide lever firmly into “N” or neutral  
position  
10. Spark plug wire is lose  
11. Spark plug is fouled  
12. Air filter is plugged or dirty  
13. Bad gasoline  
14. Fuel filter is plugged or dirty  
15. Safety switches are out of alignment  
or loose.  
10. Tighten wire or connections  
11. Clean or replace the plug  
12. Clean or replace the air filter  
13. Drain and replace the gasoline  
14. Replace the fuel filter  
15. Adjust or tighten switches (p. 18) -  
read warnings!  
16. Battery is dead (electric start mod-  
els)  
16. Recharge or replace the battery  
To test if the blade activation safety  
switches are a contributing factor to the  
engine not starting, try depressing the  
“operator present” switch o the handle  
bars while trying to start. If engine starts,  
a safety switch adjustment is required.  
Engine will not keep running / quits  
1. Water in the fuel  
2. Loose safety switch  
3. Fuel valve is OFF  
4. Dirty fuel filter  
1. Drain and replace the fuel  
2. Adjust switch (p. 18)  
3. Turn fuel valve ON  
4. Replace fuel filter  
5. Dirty air filter  
6. Low engine oil  
5. Clean or replace air filter  
6. Add engine oil  
Engine stops when blades are engaged  
1. Loose safety switch  
1. Adjust switch (p. 18)  
2. Belt tension too high  
3. Blades jammed with foreign material  
2. Adjust belt (p. 17 and 18)  
3. Remove foreign material  
Note: sometimes firmly pushing the  
blade control lever into the OFF position  
can resolve this problem by ensuring the  
safety switch is fully engaged.  
Blades do not turn  
1. Broken belt  
1. Replace belt  
2. Loose belt  
3. Blade activation linkage out of ad-  
justment.  
2. Adjust belt (p. 17 and 18)  
3. Adjust linkage (p. 17)  
Engine stops when belt drive mower is  
put into gear  
1. Loose safety switch  
2. Transmission seized  
3. Safety switches not engaged  
1. Adjust safety switch (p. 18)  
2. Call for assistance  
3. Depress safety switches  
Belts squeal when blades are engaged  
Belts slip when blades are engaged  
1. Incorrect belt tension  
2. Excessive belt wear  
1. Adjust belt tension  
2. Replace belt  
1. Incorrect belt tension  
2. Excessive belt wear  
1. Adjust belt tension  
2. Replace belt  
DEK® is exclusively distributed by GXi International, LLC  
Download from Www.Somanual1s.9coomf. A2l1l Manuals Search And Download.  
Rev: 8/2008  
Heavy Duty Power Equipment  
36B, 36BX, 36H, 36HX, 52H, 52HX  
Troubleshooting  
Problem  
Possible Causes  
Solution  
Mower will not move forward or reverse  
1. Hydro—brake is ON  
1. Release brake on control panel  
2. Ensure bypass pins are retracted  
3. Release parking brake detents  
4. Shift transmission into gear by slid-  
ing the shifter to the right  
2. Hydro—bypass levers are pulled out  
3. Belt drive—parking brakes are set  
4. Belt drive—transmission not engaged in  
a gear  
5. Belt drive—drive belt slipping  
5. Belts or engagement rods need ad-  
justment (p. 17)  
Cannot move hydro mower when the  
engine is off  
1. Hydro bypass not engaged  
1. Pull left and right bypass pins and  
set them in the slots in the chassis  
(p. 13)  
Engine is overheating  
1. Dirt in the fuel line  
2. Dirty air filter  
3. Low engine oil  
1. Replace fuel filter and flush tank  
2. Clean or replace the air filter  
3. Add engine oil  
4. Fouled spark plug  
5. Mis-application of the mower  
6. Dull blades  
4. Replace spark plug  
5. Mow slower, wait for grass to dry out  
6. Sharpen cutting blades  
7. Take in for service  
7. Spindle bearing failure  
Grass not cut smoothly or cleanly  
1. Dull blades  
1. Sharpen blades  
2. Mowing too fast for conditions  
3. Grass is wet or bent over  
4. Blades are bent  
5. Tire pressure not equal  
6. Deck is set at uneven heights  
7. Blades are set upside down  
8. Excessive grass and debris build up un-  
derneath the deck  
2. Slow down while cutting  
3. Let grass dry to stand up  
4. Let grass dry to stand up  
5. Add air pressure to low tires  
6. Set deck at equal heights  
7. Take blades off and install correctly  
8. Clean out debris  
Mower always pulls to one side  
1. Hydro—controls out of adjustment  
2. Hydro—transmission failure  
3. Belt drive—controls out of adjustment  
4. Belt drive—belt slipping  
1. Adjust controls (p. 8)  
2. Take in for service  
3. Adjust controls (p. 17)  
4. Change drive belt  
5. Take in for service  
5. Belt drive—transmission failure  
DEK® is exclusively distributed by GXi International, LLC  
Download from Www.Somanual2s.0coomf. A2l1l Manuals Search And Download.  
Rev: 8/2008  
PRODUCTS COVERED BY THIS WARRANTY:  
LENGTH OF WARRANTY:*  
(FROM THE DATE OF ORIGINAL RETAIL PURCHASE)  
COMMERCIAL  
RENTAL  
NONCOMMERCIAL/ NON-  
RENTAL  
Engine  
Manufacturer’s warranty  
Manufacturer’s warranty  
Manufacturer’s warranty  
Transmission  
Manufacturer’s warranty  
24 months  
Manufacturer’s warranty  
12 months  
Manufacturer’s warranty  
12 months  
Mower deck / spindles / wheels / pulleys / controls  
*LENGTH OF WARRANTY: Batteries supplied with applicable products as standard, original equipment are covered by this warranty for a period of 12 months  
(noncommercial use) or 3 months (commercial/rental use) from the date of original retail product purchase. Consumable parts such as oil, spark plugs, filters are not  
covered by this warranty.  
TO QUALIFY FOR THIS WARRANTY:  
The product must be purchased in the United States from a dealer authorized by GXi International, LLC to sell those products. This warranty applies to first retail pur-  
chaser / owner during the applicable warranty time period. NO WARRANTY REGISTRATION IS NECESSARY TO OBTAIN WARRANTY ON DEK PRODUCTS. SAVE  
YOUR PROOF OF PURCHASE RECEIPT. IF YOU DO NOT PROVIDE PROOF OF THE INITIAL PURCHASE DATE AT THE TIME WARRANTY SERVICE IS RE-  
QUESTED, THE MANUFACTURING DATE OF THE PRODUCT WILL BE USED TO DETERMINE THE WARRANTY PERIOD.  
WHAT DEK POWER EQUIPMENT WILL REPAIR OR REPLACE UNDER WARRANTY:  
DEK will repair or replace, at its option, any part that is proven to be defective in material or workmanship under normal use during the applicable warranty time period  
subject to the exclusions stated herein. This warranty is void if the owner fails to follow the prescribed maintenance and operating procedures described in this manual.  
This specifically refers to ensuring routine lubrications and oil changes are made, that fuel stabilizer is used when the product is stored and that the product is not over-  
loaded.  
DEK has the right to recover warranty administration costs from the owner if the root cause of the malfunction was found to be other than defective material or workman-  
ship. In particular, this warranty does not cover: contaminants in the fuel or oil; damage caused by not following the prescribed warnings and operating practices; failure  
to follow proper maintenance and storage procedures; and physical damage due to mis-use, shipping, handling or storage.  
Warranty repairs will be made without charge for parts and labor for the first year. After the first year, this limited warranty covers the costs of replacement parts only.  
Anything replaced under warranty becomes the property of DEK. Parts replaced under warranty will be considered as part of the original product and any warranty on  
those parts will expire coincident with the original product warranty.  
TO OBTAIN WARRANTY SERVICE:  
You must take the DEK Power Equipment product, accessory, replacement part, apparel or the power equipment on which the accessory or replacement part is installed,  
and proof of purchase, at your expense, to any DEK Power Equipment service location in the United States, who is authorized to service that product, during the service  
location’s normal business hours. If you are unable to obtain warranty service, or are dissatisfied with the warranty service you receive, take the following steps: First,  
contact the manager of the service center involved; normally this will resolve the problem. However, if you should require further assistance, write or call the DEK Cus-  
tomer Service.  
EXCLUSIONS:  
THIS WARRANTY DOES NOT EXTEND TO PARTS AFFECTED OR DAMAGED BY ACCIDENT AND/OR COLLISION, NORMAL WEAR, FUEL CONTAMINATION, USE  
IN AN APPLICATION FOR WHICH THE PRODUCT WAS NOT DESIGNED OR ANY OTHER MISUSE, NEGLECT, INCORPORATION OR USE OF UNSUITABLE AT-  
TACHMENTS OR PARTS, UNAUTHORIZED ALTERATION, OR ANY CAUSES OTHER THAN DEFECTS IN MATERIAL OR WORKMANSHIP OF THE PRODUCT.  
DISCLAIMER OF CONSEQUENTIAL DAMAGE AND LIMITATION OF IMPLIED WARRANTIES:  
DEK DISCLAIMS ANY RESPONSIBILITY FOR LOSS OF TIME OR USE OF THE PRODUCT, TRANSPORTATION, COMMERCIAL LOSS, OR ANY OTHER INCIDEN-  
TAL OR CONSEQUENTIAL DAMAGE. ANY IMPLIED WARRANTIES ARE LIMITED TO THE DURATION OF THIS WRITTEN LIMITED WARRANTY.  
This warranty is void if the manufacturing date and the serial number on the equipment has been removed or the equipment has been modified.  
Heavy Duty Power Equipment  
Other fine products offered by  
Generator Accessories  
Pressure Washers  
Heavy Duty Generators  
Commercial Grade Chipper Shredders  
DEK® is exclusively distributed by GXi International, LLC  
Download from Www.Somanual2s.1coomf. A2l1l Manuals Search And Download.  
Rev: 8/2008  

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