OPERATION
Operation Section 4-6
OPERATION
© 2004 Alamo Group Inc.
TWR-180 / TWR-120 12/04
2.2 Tractor Safety Devices
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!
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. TRACTOR REQUIREMENTS
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 ...................TWR-180 65 HP; TWR-120 50 HP
-Recommended...........TWR-180 85 HP; TWR-120 75 HP
¾Drawbar................................................... Set length according to operating speed and driveline type, rated
to carry weight of the mower, safety chain attachment point
¾Hydraulics -Minimum........................... 3 single acting circuits @ 1750 psi
-Phasing.............................1 double acting circuit and 2 single acting circuits @ 1750 psi
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.
¾Tire Spacing............................................. Set tires minimum width of 60” inside to inside of tires.
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.
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