Nexen BWB 846805 - Manual (Page 9)

6 FORM NO. L-20002-U-1209
parTS replaCeMenT
refer To fiGure 4.
1. Remove the Retaining Ring (Item 2).
2. Depending on which version of the BW Clutch is
being used, remove the Pilot Mount Disc (Item 15) or
the Sheave (Item 4).
3. Press the old Bearing (Item 3) out of the Sheave or
Pilot Mount Disc.
4. Clean the bearing bore of the Sheave (Item 4) or
Pilot Mount Disc (Item 15) with fresh solvent making
sure all old Loctite
® residue is removed.
5. Apply an adequate amount of Loctite ® RC609 to
evenly coat the outer race of new Bearing (Item 3).
6. Carefully align the outer race of the new Bearing
(Item 3) with the bore of the Sheave or Pilot Mount
Disc and press the new Bearing (Item 3) into place.
7. Remove the first old Spring Retaining Washer (Item
23), old Return Spring (Item 5), and the second old
Spring Retaining Washer (Item 23) from the Hub
(Item 1).
8. Slide the old Friction Disc Assembly (Item 7) off of
the Hub (Item 1).
9. Remove the old Disc Key (Item 6).
10. Slide the Hub (Item 1) out of the Air Chamber (Item
9) and Piston (Item 13).
11. Separate the Piston (Item 13) from the Air Chamber
(Item 9).
12. Remove the old O-ring Seal (Item 11) from the Air
Chamber (Item 9).
13. Press the old Thrust Bearing (Item 8) out of the Air
Chamber (Item 9).
14. Carefully align the outer race of the new Thrust
Bearing (Item 8) with the bore of the Air Chamber
(Item 9) and press the new Thrust Bearing (Item 8)
into place.
15. Remove the old O-ring Seal (Item 10) from the
Piston (Item 13).
16. Press the old Thrust Bearing (Item 8) out of the
Piston (Item 13).
17. Carefully align the outer race of the new Thrust
Bearing (Item 8) with the bore of the Piston (Item 13)
and press the new Thrust Bearing (Item 8) into place.
18. Clean the O-ring contact surfaces of the Air
Chamber and Piston with fresh safety solvent.
19. Coat the O-ring contact surfaces of the Air Chamber
and Piston with fresh O-ring lubricant and wipe off
any excess lubricant.
20. Coat the new O-ring Seals (Items 10 and 11) with
fresh O-ring Lubricant.
21. Install the new O-ring Seals (Items 10 and 11).
22. Slide the Piston (Item 13) into Air Chamber (Item 9).
23. Slide the Air Chamber and Piston onto Hub (Item 1).
24. Install the new Disc Key (Item 6) into the Hub.
25. Slide new Friction Disc Assembly (Item 7) onto the
Hub (Item 1) and Disc Key (Item 6).
NOTE: The closed end of the Return Spring
(Item 5) must face toward the Retaining Ring
(Item 2).
26. Install the new Return Spring (Item 5) and Spring
Retaining Washers (Item 23).
27. Press the Pilot Mount Disc (Item 15) and Bearing
(Item 3) or the Sheave (Item 4) and Bearing (Item 3)
onto the Hub (Item 1).
28. Reinstall the Retaining Ring (Item 2).
CAUTION
Working with spring loaded or tension
loaded fasteners and devices can cause
injury. Wear safety glasses and take the
appropriate safety precautions.