FORM NO. L-20179-F-1002
14
PARTS REPLACEMENT (MALE PILOT BEARING AND O-RING SEALS)
Always wear safety
goggles when
working with spring
or tension loaded
devices such as
retaining rings.
WARNING
FMCB 7-28, 8-38, AND 8-42
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) (See Figure 16).
2.
Remove the four Socket Head Cap Screws
securing the Male Pilot (Item 27) to the Cylinder
(Item 22) (See Figure 16).
3.
Remove the Male Pilot (Item 27) and Stub Shaft
(Item 31) from the Cylinder (See Figure 16).
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) (See Figure 17).
5.
Remove the Cylinder (Item 22) from the Air
Chamber (Item 14) (See Figure 17).
6.
Remove the Retaining Ring (Item 6 or 20) from the
Splined Disc (Item 9) (See Figure 17).
7.
Press the Splined Disc (Item 9) out of the Bearing
(Item 2 or 18) and Piston (Item 17) (See Figure 17).
8. Remove the Piston (Item 17) from the Air Chamber
(Item 14) (See Figure 17).
9. Remove the old O-ring Seals (Items 16 and 21)
from the Piston and Air Chamber (See Figure 17).
10. Remove the Retaining Ring (Item 3 or 19) from the
Piston (Item 17) (See Figure 17).
11. Press the Bearing (Item 2 or 18) out of the Piston
(Item 17) (See Figure 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).
Figure 16
Figure 16
Figure 16
Figure 16
Figure 16
Figure 17
Figure 17
Figure 17
Figure 17
Figure 17
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 (See Figure 17).
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 (See
Figure 17).
18. Slide the Piston (Item 17) into the Air Chamber
(Item 14).
7
7
7
7
7
8/15
8/15
8/15
8/15
8/15
14
14
14
14
14
22
22
22
22
22
31
31
31
31
31
27
27
27
27
27
8/26
8/26
8/26
8/26
8/26
9
9
9
9
9
14
14
14
14
14
16
16
16
16
16
21
21
21
21
21
17
17
17
17
17
8/26
8/26
8/26
8/26
8/26
25
25
25
25
25
24
24
24
24
24
23
23
23
23
23
6/20
6/20
6/20
6/20
6/20
3/19
3/19
3/19
3/19
3/19
2/18
2/18
2/18
2/18
2/18
®
DIST. AUTORIZADO
MEX (55) 53 63 23 31
QRO (442) 1 95 72 60
MTY (81) 83 54 10 18
[email protected]
