Cutting Unit Maintenance
Removing the Cutting Units
1.
Park the machine on a level surface, engage the
parking brake, lower the cutting units, shut off
the engine, and remove the key.
2.
Disconnect and remove the hydraulic motor
from the cutting unit (
). Cover the top
of the spindle to prevent contamination.
g011351
Figure 79
1.
Motor-mounting screws
3.
Remove the lynch pin (for Groundsmaster 4500
machines) or retaining nut (for Groundsmaster
4700 machines) securing the cutting unit-carrier
frame to the lift-arm pivot pin (
).
g011352
Figure 80
1.
Lynch pin
2.
Lift-arm pivot pin
4.
Roll the cutting unit away from the machine.
Installing the Cutting Units
1.
Move the cutting unit into position in front of the
machine.
2.
Slide the cutting unit-carrier frame onto the
lift-arm-pivot pin (
). Secure the
cutting unit to the pin with the lynch pin (for
Groundsmaster 4500 machines) or retaining nut
(for Groundsmaster 4700 machines).
3.
Install the hydraulic motor to the cutting unit
(
). Make sure that the O-ring is in
position and not damaged.
4.
Grease the spindle.
Servicing the Front Roller
Inspect the front roller for wear, excess wobble, or
binding. Service or replace the roller or components if
any of these conditions exist.
Disassembling the Front Roller
1.
Remove the roller-mounting bolt (
).
2.
Insert a punch through the end of the roller
housing and drive the opposite bearing out by
alternating taps to the opposite side of inner
bearing race. There should be a 1.5 mm (0.060
inch) lip of inner race exposed.
g011356
Figure 81
1.
Front roller
3.
Bearing
2.
Mounting bolt
4.
Bearing spacer
3.
Push the second bearing out in press.
4.
Inspect the roller housing, bearings, and bearing
spacer for damage (
). Replace any
damaged components and assemble them.
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