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OPERATION
SE4 05/05 Operation Section 4-7
© 2005 Alamo Group Inc.
OPERATION
2.6 Power Take Off (PTO)
Depending on the unit, the mower is designed to operate at a PTO speed of 540 or 1000 RPM. Most tractors
operate at either 540, or a combination of 540 and 1000 RPM PTO speeds. The operating speed of the
mower and tractor can be determined by the number of splines on the driveline yoke and PTO output shaft.
Those operating at 540 RPM will have a 6-spline shaft and those operating at 1000 RPM will have a 21-spline
shaft. Note: The mower will not operate on tractors equipped with a 1000 RPM 20-spline, 1-3/4” shaft. Refer
to the tractor owner’s manual for instructions to change PTO speeds on models that operate at more than one
speed.
If operating an older model tractor where the tractor’s transmission and PTO utilize one master clutch, an
over-running clutch must be used between the PTO output shaft and the driveline of the mower. An
authorized tractor dealer can provide the over-running clutch and its installation if needed. OPS-U- 0006
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 Mower resulting in excessive vibration,
thrown objects, and blade and mower 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.
(S3PT-14)
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)
3. GETTING ON AND OFF THE TRACTOR
Before getting onto the tractor, the operator must read and completely understand the implement and tractor
operator manuals. If any part of either manual is not completely understood, consult an authorized dealer for
a complete explanation. OPS-U- 0007
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)