FORM NO. L-21070-E-0614
11
FMCB 1625
Refer to Figures 8 and 9.
1. Remove the four Socket Head Cap Screws (Item 15) that
secure the Air Chamber (Item 14) to the Housing (Item 7).
2. Remove the four Socket Head Cap Screws (Item 15) that
secure the Male Pilot (Item 27) to the Air Chamber (Item 14).
3. Remove the Male Pilot (Item 27) and Stub Shaft
(Item 31) from the Air Chamber.
4. Remove the Retaining Ring (Item 6) from the Splined Disc
(Item 9).
5. Press the Splined Disc (Item 9) out of the Bearing (Item 2)
and Piston (Item 17).
6. Remove the Piston (Item 17) from the Air Chamber
(Item 14).
7. Remove the old O-Ring Seals (Items 16, 21 & 23) from the
Piston and Air Chamber.
8. Remove the Retaining Ring (Item 3) from the Piston (Item
17).
9. Press the Bearing (Item 2) out of the Piston (Item 17).
10. Clean the bearing bore of the Piston with fresh safety solvent,
making sure all old Loctite
®
residue is removed.
11. Apply an adequate amount of Loctite
®
680 to evenly coat
the outer race of the new Bearing (Item 2).
12. Carefully align the outer race of the new Bearing
(Item 2) with the bore of the Piston (Item 17).
13. Supporting the Piston (Item 17) and pressing on the outer
race of the new Bearing, press the new Bearing into the
Piston.
14. Reinstall the Retaining Ring (Item 3), securing the Bearing
to the Piston.
15. Coat the O-Ring contact surfaces of the Air Chamber
(Item 14), Piston (Item 17), Male Pilot (Item 27) and the new
O-Ring Seals (Items 16, 21, 23, and 24) with a thin film of
O-Ring lubricant and install the new O-Ring Seals.
16. Slide the Piston (Item 17) into the Air Chamber (Item 14).
17. Support the inner race of the Bearing (Item 2) and press the
Splined Disc (Item 9) into the Bearing and Piston (Item 17).
REPLACEMENT PROCEDURE–PISTON BEARING AND O-RING SEALS
18. Reinstall the Retaining Ring (Item 6) that secures the Splined
Disc to the Bearing (Item 2).
19. Align the Spring Pin (Item 25) in the Male Pilot
(Item 27) with the hole in the Piston (Item 17); then, slide the
Male Pilot into the Piston.
20. Apply a drop of Loctite
®
242 to the threads of the Socket
Head Cap Screws (Item 8).
21. Reinstall and tighten the four Socket Head Cap Screws
securing the Male Pilot (Item 27) to the Air Chamber (Item
14) to 509 in-lbs (57.5 N-m).
22. Apply a drop of Loctite
®
242 to the threads of the Socket
Head Cap Screws (Item 8 ).
23. Reinstall and tighten the four Socket Head Cap Screws (Item
15) securing the Air Chamber (Item 14) to the Housing (Item
7) to 509 in-lbs (57.5 N-m).
FIGURE 8
14
24
25
15
27
15
7
31
FIGURE 9
14
21
17
25
3
9
16
23
2
6
CAUTION
Working with spring loaded or tension
loaded fasteners and devices can cause
injury. Wear safety glasses and take the
appropriate safety precautions.
