jcb TM420 - Master Clutch - Clutch Drum and Hub: Disassembly

27 - Driveline
06 - Semi-Automatic Gearbox
13 - Clutch - Master
27 - 136 9813/6850-2 27 - 136
Disassemble and Assemble
Special Tools
Description Part No. Qty.
Peg Socket 892/01045 1
Mandrel 892/01046 1
Clutch Jig 892/01047 1
Clutch Pack Retainers 892/01048 2
Guide Rods 892/01049 2
Slide Hammer Kit 993/68100 1
Consumables
Description Part No. Size
4101/0250 0.01 LJCB Threadlocker
and Sealer (Medium
Strength)
4101/0251 0.05 L
Master Clutch- Clutch Drum and Hub
Disassembly
1. Remove the lubrication nozzles.
2. Remove the bolts.
3. Remove the release springs and the spring
pillars then discard the springs.
4. Remove the oil baffle plate from the locating
dowel 1.
5. Remove the pressure plate.
6. Make sure that you do not lose the dowel 1 and
dowel 2
7. Remove the piston from the drum.
8. Use M6 bolt (x2) and suitable levers to help in
removal of the piston.
9. Remove and discard the outer seal from the
piston.
10. Remove the socket head capscrews (x8).
11. Use a suitable bar to prevent drum rotation.
12. Use a soft faced hammer to tap out the hub from
the drum.
13. Remove and discard the O-ring 1 from the drum.
14. Remove the circlip.
15. Use a suitable drift to tap out the blanking disc
together with the inner bearing.
16. Remove and discard the O-ring 2.
17. Remove and discard the iron sealing ring.
18. Remove and discard the inner piston seal from
the hub.
19. Do not remove the outer bearing unless it is to be
replaced with a new one.
20. At the time of removal the bearing can be
damaged. When the bearing is removed it must
be replaced.
21. To remove the outer bearing, screw in two jacking
bolts at their correct location on the hub.
22. If the bronze bush is to be replaced, then remove
it with a suitable puller and slide hammer.
Special Tool: Slide Hammer Kit (Qty.: 1)