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OPERATION
Operation Section 4-6
OPERATION
© 2004 Alamo Group Inc.
SR14/SR20 10/03
2. TRACTOR REQUIREMENTS
The tractor used to operate the mower must have the power capacity to lift, pull, and operate the Power Take Off
(PTO) at the mower’s rated speed while traveling at a ground speed between 2 and 5 MPH. Operating the mower
with a tractor that does not meet the following requirements may cause tractor or mower damage and be a
potential danger to the operator and passersby.
Tractor Requirements and Capabilities
¾ASAE approved Roll-Over Protective Structure (ROPS) or ROPS cab and seat belt.
¾Tractor Safety Devices...........................………Slow Moving Vehicle (SMV) emblem, lighting,
PTO master shield
¾Tractor Horsepower -Minimum .........................75 HP
-Maximum……..................540 RPM Unit - 100 HP; 1000 RPM Unit 140 HP
¾Drawbar......................................................... 14” length for 540 RPM unit; 16” length for 1000 RPM unit, if
mower is equipped with Pintle Hook (Optional Equipment)
drawbar length must be modified (see 2.4 Drawbar), rated to
carry weight of mower, safety chain attachment point
¾Hydraulics......................................................Minimum of 1 hydraulic port (extra 3-spool valve required).
Minimum 2 ports, 3 ports recommended if additional
3-spool control valve is not used.
¾Front End Weights..…………...........................As needed to maintain 20% weight on front axle
¾Power Take Off.....................……....................Operating speed and shaft size depends on operating speed
and driveline type of the mower.
2.2 Tractor Safety Devices
If transporting or operating the tractor and mower near a public roadway, the tractor must be equipped with proper
warning lighting and a Slow Moving Vehicle (SMV) emblem which are clearly visible from the rear of the unit. Lights
and a SMV emblem must be equipped directly on implements if the visibility of the tractor warning signals are
obscured.
Maintain all manufacturer equipped safety shields and guards. Always replace shields and guards that were
removed for access to connect, service, or repair the tractor or mower. Never operate the tractor PTO with the
PTO master shield missing or in the raised position.
2.1 ROPS and Seat Belt
A Roll-Over-Protective-Structure (ROPS) and seat belt are essential to protect the operator from falling off the
tractor, especially during a roll over where the driver could be crushed and killed. The ROPS and seat belt must be
used in conjunction with one another. Only operate the tractor with the ROPS in the raised position and seat belt
fastened. Tractor models not equipped with a ROPS and seat belt should have these life saving features installed
by an authorized tractor dealer.
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)
WARNING!