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OPERATION
260/272/284 01/11 Operation Section 4-6
© 2011 Alamo Group Inc.
OPERATION
2.5 Drawbar-Pull Type Mower
For equipment operating at 540 RPM, the tractor
drawbar must be positioned at a 14” distance from the
hitch point to the PTO shaft end for proper operation and
minimal wear to the driveline. 1000 RPM 284 Models
require 16 inch drawbar length.
If attaching the mower tongue clevis to a 3-point hitch
drawbar supported by the lower lift arms, the attaching
point must be extended past the main bar to allow for turning without binding the clevis and bar. Lift arm
stabilizers must be used with this type of drawbar to prevent the mower from swaying from side to side.
OPS-R- 0061_I
2.4 Front End Weight
A minimum of 20% total tractor weight must be maintained on the tractor front end at all times. Front end
weight is critical to maintain steering control and to prevent the tractor from rearing up while driving. If the
front end is too light, add weight until a minimum of 20% total weight is reached on the front tires. Front
weights and weight carriers can be purchased through an authorized tractor dealership. OPS-U- 0005
2.6 Power Take Off (PTO)
This mower is designed to operate at a PTO speed of 540. 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: Only the 284
mower can be ordered to operate on tractors equipped with a 1000 RPM 21-spline 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-R- 0066_A