Alamo Lawn Mower SL72 User Manual

Published 03/08  
Part No. 00777576C  
This Operator's Manual is an integral part of the safe operation of this machine and must  
be maintained with the unit at all times. READ, UNDERSTAND, and FOLLOW the Safety  
and Operation Instructions contained in this manual before operating the equipment. C01-  
1502 E. Walnut  
Seguin, Texas 78155  
©2008 Alamo Group Inc.  
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In order to reduce accidents and enhance the safe operation of mowers, Alamo Industrial, in cooperation  
with other industry manufacturers has developed the AEM/FEMA Industrial and Agricultural Mower  
Safety Practices video and guide book.  
The video will familiarize and instruct mower-tractor operators in safe practices when using industrial  
and agricultural mowing equipment. It is important that Every Mower Operator be educated in the oper-  
ation of their mowing equipment and be able to recognize the potential hazards that can occur while oper-  
ating a mower. This video, along with the mower operator’s manual and the warning messages on the  
mower, will significantly assist in this important education.  
Your Authorized Alamo Industrial Dealer may have shown this video and presented you a DVD Video  
when you purchased your mower. If you or any mower operator have not seen this video, Watch the  
Video, Read this Operator’s Manual, and Complete the Video Guidebook before operating your new  
mower. If you do not understand any of the instructions included in the video or operator’s manual or if  
you have any questions concerning safety of operation, contact your supervisor, dealer or Alamo Indus-  
If you would like a VHS video tape of the video, please email [email protected] or Fax  
AEM VHS Video at (830) 372-9529 or mail in a completed copy of the form on the back of this page to  
AEM VHS Video 1502 E Walnut Street, Seguin, TX 78155. and request the VHS video version. Please  
include your name, mailing address, mower model and serial number.  
Every operator should be trained for each piece of equipment (Tractor and Mower), understand the  
intended use, and the potential hazards before operating the equipment.  
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Alamo Industrial Division is willing to provide  
one (1) AEM Mower Safety Practices Video  
Please Send Me:  
VHS Format – AEM/FEMA Mower Operator Safety Video  
DVD Format – AEM/FEMA Mower Operator Safety Video  
Mower Operator’s Manual  
AEM Mower Operator’s Safety Manual  
Requester Name  
Requester Address:  
Zip Code  
Mower Model:  
Date Purchased:  
Serial Number:  
Dealership Name:  
Mail to:  
AEM Video Services  
1502 E Walnut street  
Seguin, TX 78155  
Or Fax to:  
(830) 372-9529  
Or Email to:  
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©2008 Alamo Group Inc.  
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©2008 Alamo Group Inc.  
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Safety Section 1-1  
© 2008 Alamo Group Inc.  
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General Safety Instructions and Practices  
A careful operator is the best operator. Safety is of primary importance to the manufacturer and should be to  
the owner/operator. Most accidents can be avoided by being aware of your equipment, your surroundings, and  
observing certain precautions. The first section of this manual includes a list of Safety Messages that, if  
followed, will help protect the operator and bystanders from injury or death. Read and understand these Safety  
Messages before assembling, operating or servicing this Implement. This equipment should only be operated  
by those persons who have read the Manual, who are responsible and trained, and who know how to do so  
The Safety Alert Symbol combined with a Signal Word, as seen below, is used throughout this  
manual and on decals which are attached to the equipment. The Safety Alert Symbol means:  
are intended to warn the owner/operator of impending hazards and the degree of possible injury  
faced when operating this equipment.  
Practice all usual and customary safe working precautions and above all---remember safety is  
up to YOU. Only YOU can prevent serious injury or death from unsafe practices.  
Indicates an imminently hazardous situation that, if not avoided, WILL result in DEATH OR  
Indicates an imminently hazardous situation that, if not avoided, COULD result in DEATH  
Indicates an imminently hazardous situation that, if not avoided, MAY result in MINOR  
Identifies special instructions or procedures that, if not strictly observed, could result in  
damage to, or destruction of the machine, attachments or the environment.  
NOTE: Identifies points of particular interest for more efficient and convenient operation or  
READ, UNDERSTAND, and FOLLOW the following Safety Messages. Serious injury or  
death may occur unless care is taken to follow the warnings and instructions stated in the  
Safety Messages. Always use good common sense to avoid hazards. (SG-2)  
Si no lee ingles, pida ayuda a alguien que si lo lea para que le traduzca las  
medidas de seguridad. (SG-3)  
SL72 03/08  
Safety Section 1-2  
© 2008 Alamo Group Inc.  
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Engine Exhaust, some of its constituents, and certain vehicle components contain or emit  
chemicals known to the state of California to cause cancer and birth defects or other  
reproductive harm. (SG-30)  
Battery posts, terminals and related accessories contain lead and lead compounds,  
chemicals known to the state of California to cause cancer, birth defects or other  
reproductive harm. (SG-31)  
Operator Safety Instructions and Practices  
The rotating parts of this machine continue to rotate even after the PTO has been turned off.  
The operator should remain in his seat for 60 seconds after the brake has been set, the  
PTO disengaged, the tractor turned off, and all evidence of rotation has ceased. (S3PT-10)  
“Wait a minute...Save a life!”  
Never crawl under a raised Implement supported solely by the Tractor 3-Point hitch.  
Release of the control lever or mechanical failure will result in the Implement falling and  
possible injury or death. Always securely block up the Implement before crawling  
underneath to perform repairs and service. (S3PT-19)  
Never operate the Tractor or Implement until you have read and  
completely understand this Manual, the Tractor Operator’s Manual, and  
each of the Safety Messages found in the Manual or on the Tractor and  
Implement. Learn how to stop the tractor engine suddenly in an  
Never allow inexperienced or untrained personnel to  
operate the Tractor and Implement without supervision. Make sure the  
operator has fully read and understood the manuals prior to operation.  
The operator and all support personnel should wear hard hats, safety  
shoes, safety glasses, and proper hearing protection at all times for  
protection from injury including injury from items that may be thrown by  
the equipment. (SG-16)  
SL72 03/08  
© 2008 Alamo Group Inc.  
Safety Section 1-3  
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PERMANENT HEARING LOSS! Tractors with or without an Implement  
attached can often be noisy enough to cause permanent hearing loss.  
We recommend that you always wear hearing protection if the noise in  
the Operator’s position exceeds 80db. Noise over 85db over an  
extended period of time will cause severe hearing loss. Noise over 90db  
adjacent to the Operator over an extended period of time will cause  
permanent or total hearing loss. NOTE: Hearing loss from loud noise  
[from tractors, chain saws, radios, and other such sources close to the  
ear] is cumulative over a lifetime without hope of natural recovery. (SG-I7)  
Always read carefully and comply fully with the manufacturer’s  
instructions when handling oil, solvents, cleansers, and any other  
chemical agent. (SG-22)  
KEEP AWAY FROM ROTATING ELEMENTS to prevent entanglement  
and possible serious injury or death. (SG-24)  
Never allow children to play on or around Tractor or Implement. Children can slip or fall off  
the Equipment and be injured or killed. Children can cause the Implement to shift or fall  
crushing themselves or others. (SG-25)  
NEVER use drugs or alcohol immediately before or while operating the  
Tractor and Implement.  
alertness and coordination and therefore affect the operator’s ability to  
operate the equipment safely. Before operating the Tractor or  
Drugs and alcohol will affect an operator’s  
Implement, an operator on prescription or over-the-counter medication  
must consult a medical professional regarding any side effects of the  
medication that would hinder their ability to operate the Equipment safely.  
NEVER knowingly allow anyone to operate this equipment when their  
alertness or coordination is impaired. Serious injury or death to the  
operator or others could result if the operator is under the influence of  
drugs or alcohol. (SG-27)  
Prolonged operation may cause operator boredom and fatigue affecting safe operation.  
Take scheduled work breaks to help prevent these potentially impaired operating  
conditions. Never operate the Implement and Tractor in a fatigued or bored mental state  
which impairs proper and safe operation. (SG-32)  
SL72 03/08  
© 2008 Alamo Group Inc.  
Safety Section 1-4  
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Use extreme caution when getting onto the Implement to perform repairs, maintenance and  
when removing accumulated material. Only stand on solid flat surfaces to ensure good  
footing. Use a ladder or raised stand to access high spots which cannot be reached from  
gound level. Slipping and falling can cause serious injury or death. (SG-33)  
Avoid contact with hot surfaces including hydraulic oil tanks, pumps, motors, valves and  
hose connections. Relieve hydraulic pressure before performing maintenance or repairs.  
Use gloves and eye protection when servicing hot components. Contact with a hot surface  
or fluid can cause serious injury from burns or scalding. (SG-34)  
DO NOT operate this Implement on a Tractor that is not properly maintained. Should a  
mechanical or Tractor control failure occur while operating, immediately shut down the  
Tractor and perform repairs before resuming operation. Serious injury and possible death  
could occur from not maintaining this Implement and Tractor in good operating condition.  
Avoid contact with hot surfaces of the engine or muffler. Use gloves and eye protection  
when servicing hot components. Contact with a hot surface or fluid can cause serious injury  
from burns or scalding. (SG-38)  
Do not put hands or feet under mower decks. Blade Contact can result  
in serious injury or even death. Stay away until all motion has stopped  
and the decks are securely blocked up. (SGM-9)  
Always keep a careful lookout and use extreme care when working around utility and  
municipal obstructions. Never allow the Mower to contact any utility, municipal, or other  
type structure. Clearly mark all mowing obstructions and consult local utility providers for  
a safe code of operation. (SPU-5)  
Do not operate the implement while wearing loose fitting clothing. Entanglement of the  
clothing with the rotating elements can result in serious injury or even death. Stay clear of  
all rotating elements at all times. (SSP-3)  
Equipment Operation Safety Instructions and Practices  
Never leave the Tractor and Implement unattended while the Implement is in the lifted  
position. Accidental operation of lifting lever or a hydraulic failure may cause sudden drop  
of unit with injury or death by crushing. To properly park the implement when disconnecting it from the tractor,  
lower the stand and put the retaining pin securely in place, or put a secure support under the A-Frame. Lower  
the implement carefully to the ground. Do not put hands or feet under lifted components. (S3PT-1)  
SL72 03/08  
Safety Section 1-5  
© 2008 Alamo Group Inc.  
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Use extreme care when lowering or unfolding the implement’s wings. Make sure no  
bystanders are close by or underneath the wings. Allow ample clearance around the  
implement when folding or unfolding the wings. Use extreme caution around buildings or  
overhead power lines. (S3PT-5)  
This Implement is wider than the Tractor. Be careful when operating or transporting this  
equipment to prevent the Implement from running into or striking sign posts, guard rails,  
concrete abutments or other solid objects. Such an impact could cause the Implement and  
Tractor to pivot violently resulting in loss of steering control, serious injury, or even death.  
Never allow the Implement to contact obstacles. (S3PT-12)  
Be sure you have adequate knowledge of the property you will be working on. Take time to  
make yourself aware of any area underground lines or cables. Contact with buried lines or  
cable could result in serious injury or death. If in doubt about buried utility lines call 811  
before digging or 1-800-258-0808. (SBH-6)  
Do not operate Mower if excessive vibration exists.  
Shut down PTO and the Tractor  
engine. Inspect the Mower to determine the source of the vibration. If Mower blades are  
missing or damaged replace them immediately.  
Do not operate the mower until the blades have been  
replaced and the Mower operates smoothly. Operating the Mower with excessive vibration can result in  
component failure and broken objects to be thrown outward at very high velocities. To reduce the possibility of  
property damage, serious injury, or even death, never allow the Mower to be operated with blades missing.  
Operate this Equipment only with a Tractor equipped with an approved roll-  
over-protective system (ROPS). Always wear seat belts. Serious injury or  
even death could result from falling off the tractor--particularly during a turnover  
when the operator could be pinned under the ROPS. (SG-7)  
BEFORE leaving the tractor seat, always engage the brake and/or set  
the tractor transmission in parking gear, disengage the PTO, stop the  
engine, remove the key, and wait for all moving parts to stop. Place the  
tractor shift lever into a low range or parking gear to prevent the tractor  
from rolling. Never dismount a Tractor that is moving or while the engine  
is running. Operate the Tractor controls from the tractor seat only. (SG-9)  
Never allow children or other persons to ride on the Tractor or Implement.  
Falling off can result in serious injury or death. (SG-10)  
SL72 03/08  
Safety Section 1-6  
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Never allow children to operate, ride on, or come close to the Tractor or  
Implement. Usually, 16-17 year-old children who are mature and  
responsible can operate the implement with adult supervision, if they  
have read and understand the Operator’s Manuals, been trained in  
proper operation of the tractor and Implement, and are physically large  
enough to reach and operate the controls easily. (SG-11)  
Do not mount the Tractor while the tractor is moving. Mount the Tractor  
only when the Tractor and all moving parts are completely stopped. (SG-12)  
Start tractor only when properly seated in the Tractor seat. Starting a  
tractor in gear can result in injury or death. Read the Tractor operators  
manual for proper starting instructions. (SG-13)  
Do not operate this Equipment with hydraulic oil or fuel leaking. Oil and  
fuel are explosive and their presence could present a hazard. Do not  
check for leaks with your hand! High-pressure oil streams from breaks in  
the line could penetrate the skin and cause tissue damage including  
gangrene. To check for a hose leak, SHUT the unit ENGINE OFF and  
remove all hydraulic pressure. Wear oil impenetrable gloves, safety  
glasses and use Cardboard to check for evidence of oil leaks. If you  
suspect a leak, REMOVE the HOSE and have it tested at a Dealer. If oil  
does penetrate the skin, have the injury treated immediately by a  
physician knowledgeable and skilled in this procedure. (SG-15)  
Never run the Tractor engine in a closed building or without adequate ventilation. The  
exhaust fumes can be hazardous to your health. (SG-23)  
Do not exceed the rated PTO speed for the Implement. Excessive PTO speeds can cause  
Implement driveline or blade failures resulting in serious injury or death. (SG-26)  
Operate the Tractor and/or Implement controls only while properly seated in the Tractor seat  
with the seat belt securely fastened around you. Inadvertent movement of the Tractor or  
Implement may cause serious injury or death. (SG-29)  
SL72 03/08  
© 2008 Alamo Group Inc.  
Safety Section 1-7  
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In case of mechanical difficulty during operation, place the transmission in the park  
position, set the parking brake, shut down all power, including the PTO and the engine and  
remove the key. Wait until all rotating motion has stopped before dismounting. (SG-39)  
Do Not operate this equipment in areas where insects such as bees may attack you and/or  
cause you to lose control of the equipment. If you must enter in such areas, use a tractor  
with an enclosed Cab and close the windows to prevent insects from entering. If a tractor  
cab is not available, wear suitable clothing including head, face, and hand protection to  
shield you from the insects. Attacking insects can cause you to lose control of the tractor,  
which can result in serious injury or death to you or bystanders. Never dismount a moving  
tractor. (SG-40)  
Mow only in conditions where you have clear visibility in daylight or with adequate artificial  
lighting. Never mow in darkness or foggy conditions where you cannot clearly see at least  
100 yards(90 m) in front and to the sides of the tractor and mower. Make sure that you can  
clearly see and identify passersby, steep slopes, ditches, drop-offs, overhead obstructions,  
power lines, debris and foreign objects. If you are unable to clearly see these type of items  
discontinue mowing. (SGM-1)  
There are obvious and hidden potential hazards in the operation of this  
Mower. REMEMBER! This machine is often operated in heavy brush  
and in heavy weeds. The Blades of this Mower can throw objects if shields are not  
properly installed and maintained. Serious injury or even death may occur unless care is  
taken to insure the safety of the operator, bystanders, or passersby in the area. Do not  
operate this machine with anyone in the immediate area. Stop mowing if anyone is within  
100 yards of mower. (SGM-2)  
The rotating parts of this machine have been designed and tested for rugged use.  
However, the blades could fail upon impact with heavy, solid objects such as metal guard  
rails and concrete structures. Such impact could cause the broken objects to be thrown  
outward at very high velocities. To reduce the possibility of property damage, serious  
injury, or even death, never allow the cutting blades to contact such obstacles. (SGM-4)  
Extreme care should be taken when operating near loose objects such  
as gravel, rocks, wire, and other debris. Inspect the area before  
mowing. Foreign objects should be removed from the site to prevent machine damage  
and/or bodily injury or even death. Any objects that cannot be removed must be clearly  
marked and carefully avoided by the operator. Stop mowing immediately if blades strike a  
foreign object. Repair all damage and make certain rotor or blade carrier is balanced  
before resuming mowing. (SGM-5)  
SL72 03/08  
Safety Section 1-8  
© 2008 Alamo Group Inc.  
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Many varied objects, such as wire, cable, rope, or chains, can become entangled in the  
operating parts of the mower head. These items could then swing outside the housing at  
greater velocities than the blades. Such a situation is extremely hazardous and could result in serious injury  
or even death. Inspect the cutting area for such objects before mowing. Remove any like object from the site.  
Never allow the cutting blades to contact such items. (SGM-6)  
Mow at the speed that you can safely operate and control the tractor and mower. The  
correct mowing speed depends on terrain condition and grass type, density, and height of  
cut. Normal ground speed range is from 2 to 5 mph(3-8 kph). Use slow mowing speeds when operating on  
or near steep slopes, ditches, drop-offs, overhead obstructions, power lines, or when debris and foreign  
objects are to be avoided. (SGM-7)  
Avoid mowing in reverse direction when possible. Check to make sure there are no  
persons behind the mower and use extreme care when mowing in reverse. Mow only at a  
slow ground speed where you can safely operate and control the tractor and mower.  
Never mow an area that you have not inspected and removed debris or foreign material.  
Do not mow with two machines in the same area except with Cab tractors with the windows  
closed. (SGM-11)  
Follow these guidelines to reduce the risk of equipment and grass fires  
while operating, servicing, and repairing the Mower and Tractor:  
-Equip the Tractor with a fire extinguisher in an accesible location.  
-Do Not operate the Mower on a Tractor with an underframe exhaust.  
-Do Not smoke or have an open flame near the Mower and Tractor.  
-Do Not drive into burning debris or freshly burnt areas.  
-Ensure slip clutches are properly adjusted to prevent excessive slippage and plate heating.  
-Never allow clippings or debris to collect near drivelines, slip clutches, and gearboxes.  
Periodically shut down the Tractor and Mower and clean clippings and collected debris from  
the mower deck. (SGM-12)  
The Mower is designed for certain mowing applications and is rated to cut up to a specific  
size vegetation (see Mower Standard Equipment and Specifications). DO NOT use this  
mower to cut vegetation above the Mower’s rated capacity or to cut any type of non-vegetative material. Only  
operate this Mower on a properly sized and equipped Tractor. Operating this Mower in an application for  
which it is not designed and/or operating the Mower with the wrong size Tractor can cause Mower component  
damage and equipment failure resulting in possible serious injury or death. (SGM-14)  
SL72 03/08  
Safety Section 1-9  
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Do not operate or pull the mower into standing water. When uplift or fan type mower blades  
contact water they can be severely deflected downward causing possible failure of blade  
resulting in serious boldly injury to the operator or bystanders. (SGM-15)  
Use extreme caution when raising the Mower above ground level. Stop the Blades from  
turning when the Mower is raised and passersby are within 100 yards. Raising the  
Mower exposes the Cutting Blades which creates a potentially serious hazard and can cause serious injury  
by objects thrown from the Blades or by contact with the Blades. (SPU-1)  
Rotary Mowers are capable under adverse conditions of throwing  
objects for great distances (300 feet or more) and causing serious injury  
or death. Follow safety messages carefully.  
-Front and Rear Deflectors, Chain Guards, or Bands are installed and in good, workable  
-Mower sections or Wings are running close to and parallel to the ground without exposed  
-Passersby are outside the existing thrown-object zone;  
-All areas have been thoroughly inspected and all foreign material such as rocks, cans,  
glass, and general debris has been removed.  
NOTE: Where there are grass and weeds high enough to hide debris that could be struck  
by the blades, the area should be: inspected and large debris removed, mowed at an  
intermediate height, inspected, closely with any remaining debris being removed, and  
mowed again at desired final height. (This will also reduce power required to mow, reduce  
wear and tear on the Mower drivetrain, spread cut material better, reduce streaking, and  
make the final cut more uniform). (SRM-1)  
Do not turn so sharp or lift mower so high to produce a severe "knocking" of the Driveline  
which will cause accelerated wear and breakage of drive train components and could result  
in possible injury from the separated Driveline sections. (SRM-4)  
Do not let the Blades turn when the Mower Deck is raised for any  
reason, including clearance or for turning. Raising the Mower deck  
exposes the Cutting Blades which creates a potentially serious hazard and could cause  
serious injury or even death from objects thrown from the Blades. (SRM-7)  
SL72 03/08  
Safety Section 1-10  
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Connecting or Disconnecting Implement Safety Instructions and  
DO NOT use a PTO adapter to attach a non-matching Implement driveline to a Tractor  
PTO. Use of an adapter can double the operating speed of the Implement resulting in  
excessive vibration, thrown objects, and blade and implement failure. Adapter use will also  
change the working length of the driveline exposing unshielded driveline areas. Serious  
bodily injury and/or equipment failure can result from using a PTO adapter. Consult an  
authorized dealer for assistance if the Implement driveline does not match the Tractor PTO.  
Always shut the Tractor completely down, place the transmission in park, and set the  
parking brake before you or anyone else attempts to connect or disconnect the Implement  
and Tractor hitches. (S3PT-15)  
Never operate the Tractor and Mower if the Implement input driveline is directly connected  
to the Tractor transmission. Tractor braking distances can be substantially increased by  
the momentum of the rotating Mower blades driving the Tractor transmission even though  
the Tractor clutch has been disengaged. Install an over running clutch between the Tractor  
PTO and the Mower driveline to prevent this potentially dangerous situation. (S3PT-16)  
When attaching the Implement input driveline to the Tractor PTO, it is important that the  
connecting yoke spring activated locking collar slides freely and the locking balls are seated  
securely in the groove on the Tractor PTO shaft. A driveline not attached correctly to the  
Tractor PTO shaft could come loose and result in personal injury and damage to the  
Implement. (S3PT-17)  
Before operating the Implement, check to make sure the Implement input driveline will not  
bottom out or become disengaged. Bottoming out occurs when the inner shaft penetrates  
the outer housing until the assembly becomes solid-it can shorten no more. Bottoming out  
can cause serious damage to the Tractor PTO by pushing the PTO into the Tractor and  
through the support bearings or downward onto the PTO shaft, breaking it off. A broken  
driveline can cause personal injury. (S3PT-18)  
Transporting Safety Instructions and Practices  
Be particularly careful when transporting the Implement with the Tractor. Turn curves or go  
up hills only at a low speed and using a gradual steering angle. Rear mounted implements  
move the center of gravity to the rear and remove weight from the front wheels. Make certain, by adding front  
ballast, that at least 20% of the tractor’s weight is on the front wheels to prevent rearing up, loss of steering  
control or Tractor tip-over. Slow down on rough or uneven surfaces to prevent loss of steering control which  
could result in property damage or possible injury. Do not transport unless 3-Point lift lever is fully raised and  
in the latched transport position. Dropping implement in transport can cause serious damage to the tractor  
and/or Implement and possibly cause the operator or others to be injured or killed. (S3PT-2)  
SL72 03/08  
Safety Section 1-11  
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