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24 Owner Service
MAN0571 (Rev. 6/15/2007)
Figure 13. Slip Clutch Assembly
SLIP CLUTCH ADJUSTMENT
The slip clutch is designed to slip so that the gearbox
and driveline are protected if the cutter strikes an
obstruction.
A new slip clutch or one that has been in storage over
the winter may seize. Before operating the cutter, make
sure it will slip by performing the following operation:
1. Turn off tractor engine and remove key.
2. Remove driveline from tractor PTO.
3. Loosen six 12 mm cap screws (7) to remove all
tension from compression spring (8).
4. Hold clutch hub (3) solid and turn shaft to make
sure clutch slips.
5. If clutch does not slip freely, disassemble and clean
the flange yoke (1), clutch hub (3), drive plate (5),
and thrust plate faces (6).
6. Reassemble clutch.
7. Compress each of the six compression springs (8)
by tightening the six cap screws (7) and lock nuts
(10). The compression springs should be
compressed to a height of 1-7/16", not including
washer (9). The minimum spring height is 1.36".
See Figure 13.
8. If a clutch continues to slip when the springs are
compressed to 1.36", check friction discs (2) for
excessive wear. Discs are 1/8" when new. Replace
discs after 1/16" wear. Minimum disc thickness is
1/16".
SHIELDING REPAIR
Full chain or rubber shielding is required for all
non-agricultural mowing. Full shielding is also rec-
ommended for all agricultural use to further reduce
the risk of thrown objects.
Repairing Rubber Shielding
Inspect belting and rear bands each day of operation
and replace if bent, cracked, or broken.
Repairing Optional Chain Shielding
Inspect chain shielding each day of operation and
replace any broken or missing chains as required.
1. Flange yoke
2. Friction disc
3. Hub, 1-3/4" 20-spline
4. Drive plate
5. Drive plate - SN
6. Thrust plate
7. 12 mm x 115 mm GR8.8 HHCS
8. Compression spring
9. Flat washer
10. 12 mm x 1.25P Nylok lock nut
11. 12 mm x 65 mm GR8.8 HHCS
12. 12 mm x 1.5P Nylok lock nut