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Owner Service 23
MAN0654 (Rev. 10/19/2007)
5. If clutch does not slip freely, disassemble and clean
the flange yoke (1), clutch hub (3), drive plate (4),
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 15.
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.
Figure 14. BB600X, BB720X, BB840X & BB840XP S/N 1127329 & Above Slip Clutch Assembly
Figure 15. Slip Clutch Assembly BB840XP S/N 1127328 & Below
1. Flange yoke
2. Friction disc
3. Hub, 1-3/4 - 20 spline
4. Thrust plate
5. Belleville spring plate
6. 10 mm x 1.5P x 50 mm Cap screw
7. 10 mm x 1.5P Hex nut
8. 12 mm x 1.5P x 65 mm Cap screw
9. 12 mm x 1.5P Hex nut
1. Flange yoke
2. Friction disc
3. Hub, 1-3/4" 20 Spline
4. Drive plate
5. Drive plate
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
(Rev. 10/31/2008)