GMC C Series 1993, Руководство по ремонту

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A IR BRAKE VALUES 5H-3
8. V-spring (15).
9. Filter cup (18) in body.
10. Spring (19).
11. Gasket (20).
12. Top cap (21).
13. Eight bolts (23).
Tighten
• Bolts (23) to 20 N-m (15 ft. lbs.).
14. Filter screen (6).
15. O-ring (7).
•Apply a small amount of grease to hold the
O-ring in its seat.
16. Seat ring assembly (8).
• The spring end faces outward.
17. Spacer (9) with the slot aligned with the exhaust
port in the bottom cap.
18. Sleeve (10) into the unloader nut (13).
19. O-ring (12) onto the nut (13). ,
20. Piston (11) into the sleeve. ' v
• The V-cup seal lips must face the unloader nut.
21. A non-hardening sealing compound to the unloader
nut threads. . ; . ^
22. Insert , an 11 mm (7/16 inch) diameter rod-through
the exhaust port of the bottom cap to align the slot
in the spacer with the unloader port opening.
23. Unloader nut (13).
Tighten
iceable. If the heater and thermostat are inoper­
ative, replace the purge valve assembly.
.
) ■
6. Bolts (6 and 24), nuts (2), and washers (3 and
7. End cover (4) and desiccant cartridge (30)
8. O-ring (28).
Important
Do not remove the safety valve Unless it is mal
functioning.
-1.
9. Desiccant cartridge (30) from end cover (4).
• Use a strap or chain wrench located about 3
inches from the end cover.
• Substantial force will be needed.
,10. O-ring (29).
Clean
• All metal parts with mineral spirits or another Suit­
able solvent.
• All old thread sealer from the port; threads.
Inspect
• All metal parts for severe corrosion, pitting, and
cracks.
• Nut (13) to 81 N-m (60 ft. lbs.).
24. Remove the rod.
25. Ball (24).
26. Copper gasket (25).
27. Check valve spindle (26).
28. Spring (27).
29. Copper gasket (28).
.
30. Top nut (29).
Tighten
, • Nut (29) to 81 N-m (60 ft. lbs.).
— Minor corrosion and/or pitting on the exterior of
the upper and lower cases is allowed.
• Bores of the end cover and purge valve housing for
deep scuffing or gouges. Replace as needed.
•All purge valve housing and end cover passages
are open and free of obstructions. Clean as need­
ed.
• Purge va|ve housing bore and seats for wear and
scuffing. Replace if found.
• Purge valve piston seat for excessive wear.
Replace if found.
BENDIX AD-9
4- +
Remove or Disconnect (Figure d)
1. Check valve (23) and O-ring (22). .
2. Bolts (16).
3. Purge valve assembly (21).
4. O-rings (7, 8, and 9).
5. Disassemble purge valve assembly (21).
A. Nut (18).
B. Washer (17).
C. Diaphragm (19).
D. Purge valve (20).
E. Bolt (10).
F. Purge piston (13).
G. Spring (14). ; '
H. O-rings (11 and 12). •
Important
• pc not attempt to remove the heater and
thermostat assembly. These parts are not serv-
■M- Install or Connect (Figure 2)
NOTICE: For steps 2 ,4 , 6, and 12, see “ No­
tic e ” on page 5H-1.
1. Lubricate all O-rings, O-ring grooves, and bores
with barium base lubricant.
2. Assemble purge valve assembly (21). .
A. O-ring (12) on purge piston (13).
B.
Spring (14) in housing bore.
C. O-ring (11) in purge piston,
D. Bolt (10) in purge piston.
E. Purge piston^ 13).
a. Push piston to the bottom of the bore. ...
F. Purge valve (20) (rubber side first), diaphragm
(19), washer (17), and nut (18) while pressing
down on the purge piston.