10
PN 55191 (4/22/99)
Top Link Adjustment
(Figure 2)
B
A
1
CD3944
1. Tractor top link
A. Mower top link
attachment point
B. Mower hitch pin
Figure 2
. Top Link Adjustment
When the cutting height is adjusted, adjust tractor top
link until mower top link attachment point “A” is
aligned vertically with mower hitch pin “B.”
Attaching Mower to Tractor
(Figure 5)
The standard 1-3/8” 6B spline driveline with a QD
yoke is used to connect mower to tractor.
Attach the mower hitch pins to lower tractor lift arms
and secure.
Attach tractor top link (1) to offset links (9). Connect
the driveline to the tractor PTO shaft.
WARNING
J
Make sure spring-activated locking
pin or collar slides freely and is seated
firmly in tractor PTO spline groove.
Adjust the tractor lower 3-point arm anti-sway devices
to prevent mower from swinging side to side during
transport.
Cutting Height Adjustment
(Figure 3)
IMPORTANT
J
Avoid low cutting heights. Striking the
ground with blades produces one of the
most damaging shock loads a mower can
encounter. Allowing blades to contact
ground repeatedly will cause damage to
mower and drive.
WARNING
J
Keep all persons away from operator
control area while performing adjust-
ments, service or maintenance.
CD3551B
B
A
FORWARD
Figure 3
. Cutting Height Adjustment
Level mower from side to side. Check by measuring
from mower frame to the ground at each deck rail.
Adjust, using tractor 3-point arm leveling device.
Best mowing results will be obtained with front of
mower level with or slightly lower than the rear.
Cutting height is controlled with tractor 3-point arms
and front and rear caster wheel adjustment. Optional
check chains are available.
WARNING
J
Never go underneath equipment low-
ered to the ground or raised, unless it is
properly blocked and secured. Never
place any part of the body underneath
equipment or between moveable parts
even when the engine has been turned off.
Hydraulic system leak down, hydraulic
system failures, mechanical failures or
movement of control levers can cause
equipment to drop or rotate unexpectedly
and cause severe injury or death. Follow
Operator’s Manual instructions for work-
ing
underneath
and
blocking
requirements, or have work done by a
qualified dealer.
To raise rear of mower, move caster adjustment
spacers under caster arms. Hex opening of blade
wrench fits bolts on top of caster shaft.
To raise front of mower, raise tractor 3-point arms,
shorten optional check chains or move spacers under
front caster wheel arms.
The cutting height is the distance between the blade
and the ground. The blades are 7-3/4” below the top
of the deck rail on the RM550 (8-3/4” below the top of
the deck rail on the RM660). To check cutting height,
place a straight edge along top edge of deck rail as
shown in Figure 3.
Measure from bottom of straight edge to the ground
at locations “A” and “B”. Subtract 7-3/4” on RM550
(8-3/4” on RM660) from measurement “B” to deter-
mine cutting height.