GMC C Series 1993, Repair Manual

Page: 116 / 264

AIR BRAKE VALVES 5H-11
3. Valve (10).
4. Spring (9).
5. Washer (8).
6. Retaining ring (7).
7. O-ring (4) on upper piston (5).
8. Press the piston assembly (11) in piston (5)
9. Piston spring (13) in body (14).
10. Piston assembly.
11. Cover (3).
N O T IC E : S e e
“
N o tic e ” o n p a g e 5 H -1 .
12. Four screws (1) and washers (2).
Q Tighten
• Screws (1) to 7.3 N.m (65 in. lbs.).
13. Spring
t
14. Body
y
B5785
Figure 14— Bendix LQ-4 Limiting Valve
CHECK VALVES
BENDIX SC-2 SINGLE CHECK
VALVE
Remove or Disconnect (Figure 15)
1. Screw cap (7).
2. Identification washer (6).
3. Spring (5).
4. Disc valve (4).
5. Valve seat (3).
6. Washer (2). •
Clean
• All metal parts in mineral spirits or another suitable
solvent.
Inspect
• The valve seat for evidence of deterioration or
hardening. Replace as needed.
• The valve disc for smoothness and corrosion.
Replace as needed.
• The valve cap and body for damaged threads.
Replace as needed.
Install or Connect (Figure 15)
• Use only new rubber seals from the repair Kit.
1. Washer (2).
2. Valve seat (3).
3. Disc valve (4).
4. Spring (5).
5. Identification washer (6).
6. Screw cap (7).