Nexen FMCB-7-38 801613 - Manual (Page 15)

FORM NO. L-20179-H-1209 15
Male PIlOT BearInG anD O-rInG SealS continued
FMCB 7-28, 8-38, anD 8-42
refer to Figures 13 & 14.
note
On Model 7-28, the Socket Head Cap Screws are
Item 8. On Models 8-38 and 8-42, the Socket Head
Cap Screws are Item 15.
1. Remove the four Socket Head Cap Screws and
separate the Air Chamber (Item 14) from the Housing
(Item 7).
2. Remove the four Socket Head Cap Screws securing
the Male Pilot (Item 27) to the Cylinder (Item 22).
3. Remove the Male Pilot (Item 27) and Stub Shaft (Item
31) from the Cylinder.
note
On Models 7-28 and 8-42, the Socket Head Cap
Screws are Item 26. On Model 8-38, the Socket
Head Cap Screws are Item 8.
4. Remove the four Socket Head Cap Screws securing
the Cylinder (Item 22) to the Air Chamber (Item
14).
5. Remove the Cylinder (Item 22) from the Air Chamber
(Item 14).
6. Remove the Retaining Ring (Item 6 or 20) from the
Splined Disc (Item 9).
7. Press the Splined Disc (Item 9) out of the Bearing
(Item 2 or 18) and Piston (Item 17).
8. Remove the Piston (Item 17) from the Air Chamber
(Item 14).
9. Remove the old O-Ring Seals (Items 16 and 21) from
the Piston and Air Chamber.
10. Remove the Retaining Ring (Item 3 or 19) from the
Piston (Item 17).
11. Press the Bearing (Item 2 or 18) out of the Piston (Item
17).
12. Clean the bearing bore of the Piston with fresh
safety solvent, making sure all old Loctite ® residue is
removed.
13. Apply an adequate amount of Loctite ® 680 to evenly
coat the outer race of the new Bearing (Item 2 or
18).
14. Carefully align the outer race of the new Bearing (Item
2 or 18) with the bore of the Piston (Item 17).
15. Supporting the Piston (Item 17) and pressing on the
outer race of the new Bearing, press the new Bearing
into the Piston.
16. Reinstall the Retaining Ring (Item 3 or 19), securing
the Bearing to the Piston.
17. Coat the O-Ring contact surfaces of the Air Chamber
(Item 14), Piston (Item 17), and the new O-Ring Seals
(Items 16 and 21) with a thin film of O-Ring lubricant
and install the new O-Ring Seals.
Figure 13
7
8/15
14
22
31
27
8/26
Figure 14
9
14
16
21
17
8/26
25
24
23
6/20
3/19
2/18
CAUTION
Working with spring loaded or tension
loaded fasteners and devices can cause
injury. Wear safety glasses and take the
appropriate safety precautions.