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4 -14
4.8 SLIP CLUTCH ADJUSTMENT
• Adjust the slip clutch after every 100 hours of
operation.
• Remove the attachment and lower the rear of the
tractor to the ground. Carefully clean the front of
the transmission. Remove the quick hitch studs
from the transmission and remove the quick hitch
PTO assembly and PTO brake assembly (Figures
5 & 6).
NOTE:
The attachment gasket must be replaced if
damaged.
• Remove the dog and trunnion block. Disconnect
the wiring harness from the PTO brake interlock
switch and remove the shifter parts. Slide the
shipper shaft assembly through the top of the
advance casting. Slide the clutch assembly and
pinion shaft out of the transmission. Remove the
retaining ring and slide the clutch assembly off of
the pinion shaft. Turn all of the jam nuts
counterclockwise to loosen.
• Torque bolts in stages using the pattern shown in
Figure 8:
1. Tighten bolts down until the spring starts to
compress.
2. Tighten bolts to 80-85 in-lbs (9-9.6 Nm).
3. Tighten nuts to 165-170 in-lbs (18.6-19.2 Nm).
4. Finish tightening the nuts to 100-150 ft-lbs
(136-203 Nm).
NOTE:
Do not tighten the bolts in a circular sequence,
that is, by tightening the bolt next to one which was just
tightened. The bolts should be tightened in a cross
sequence, that is, by tightening one bolt, then
tightening the bolt which is across from it on the plate.
Continue tightening the bolts in this sequence until all
the bolts are tightened. (Figure 8)
• Slide the clutch assembly back onto the pinion
shaft, install the retaining ring and slide the pinion
shaft completely into the transmission. Install the
shipper shaft and other parts that were removed
previously. Make sure the trunnion block is on the
shipper shaft and held in place by the dog. The
dog should rest on the spiral teeth of the clutch dog
plate. Install the gasket. Align the splines on the
quick hitch shaft with those in the dog. Slide the
quick hitch casting and PTO brake assembly back
into place on the front of the transmission. Install
the quick hitch studs and tighten.
WARNING:
Stop the engine before adjusting
the slip clutch.
Figure 7
1. Back Plate
2. Brake Disc
3. Dog Plate Brake
4. Trunnion Block
5. Seal
6. Quick Hitch Shaft
7. Quick Hitch Casting
8. Dog
9. Friction Washer
10.Dog Plate
11.Drive Plate
12.Friction Washer
13.Back Plate
14.Pinion Shaft
15.Shipper Shaft
16.Shipper Shaft Gasket
17.Shipper Shaft Body
18.Shipper Shaft
19.Set Screw
20.Roll Pin
1
2
3
2
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
4
20
1
2
Figure 8
OH0220
3
2
4
5
6