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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
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
(Figure
78). 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.
Figure 80
1. Front roller
2. Mounting bolt
3.
Push the second bearing out in press.
4.
Inspect the roller housing, bearings, and bearing
spacer for damage
damaged components and assemble them.
(Figure
79). Secure the
(Figure
3. Bearing
4. Bearing spacer
(Figure
80). Replace any
Assembling the Front Roller
1.
Press the first bearing into the roller housing
(Figure
equally on the inner and outer race.
2.
Insert the spacer
3.
Press the second bearing into the roller housing
(Figure
outer race until the inner race contacts the
spacer.
4.
Install the roller assembly into the cutting-unit
frame.
5.
Verify that there is no more than a 1.5 mm (0.060
inch) gap between roller assembly and the roller
mount brackets of the cutting-unit frame. If there
is a gap over 1.5 mm (0.060 inch), install enough
5/8-inch diameter washers to take up the slop.
Important:
with a gap larger than 1.5 mm (0.060 inch)
creates a side load on the bearing and can
lead to premature bearing failure
6.
Torque the mounting bolt to 108 N∙m (80 ft-lb).
80).
g011356
64
80). Press on the outer race only or
(Figure
80).
80). Pressing equally on the inner and
Securing the roller assembly
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