Alamo RHINO FX21 - Manual (Page 104)

OPERATION
FX17/FX21 02/11 Operation Section 4-6
© 2011 Alamo Group Inc.
OPERA
T
ION
3.4 Drawbar
The tractor drawbar must be positioned at a certain
length based on the operating speed of the mower
to ensure proper driveline operation. 540 rpm
mowers require the drawbar length measured from
shaft end to hitch pin hole to be positioned at 14”.
Ensure the drawbar is rated to carry the tongue
weight of the mower.
3.5 Tractor Hydraulics
The mower is raised and lowered with three hydraulic cylinders, one for each section. Hydraulic lines are
plumbed together and controlled by a single tractor hydraulic selective control valve. The tractor must be
equipped with one single acting selective control valve with float detent to operate the mower hydraulics.
During operation, the tractor hydraulics must be set in the float detent to enable the mower sections to follow
the contour of the terrain.
3.6 Front End Weight
Maintain a minimum of 20% total tractor weight on the tractor front end at all times. Front end weight is critical
to maintain steering ability and to prevent the front end from rearing up. Consult your authorized tractor dealer
for front weights and carriers.
3.7 Power Take Off (PTO)
Only operate the mower on a tractor equipped to operate at 540 rpm PTO speed. Tractors operating at 540
rpm will have a 1-3/8” diameter 6-spline PTO shaft stub. Refer to the tractor operator’s manual for operating
the PTO at the proper speed.
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.
(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)