GMC C Series 1993, Repair Manual

Page: 136 / 264

AIR FOUNDATION BRAKES 51-7
A. Removing Release Tool from Pocket
B. Inserting Release Tool in Keyhole
51. Release Tool Washer
52. Release Tool Nut
F9572
Figure 14— Inserting the Release Tool
Figure 16—Caged Anchorlok Spring Brake
Chamber
2. Pushrod assembly (4).
• Compress the return spring and clamp it in place
with locking pliers. ~
OVERHAUL
Remove or Disconnect (Figures 17 and 18)
1. Mark the cover, housing, and adapter in relation to
the clamp ring.
• 2. Pull out the pushrod and clamp it with locking-type
pliers. 1
3. Nuts (20) and bolts (9). '
4. Clamp ring (8).
5. Service housing (2).
• Release the locking pliers.
6. Diaphragm (5).
7. Pushrod assembly (4).
8. Return spring (3).
Inspect
• The diaphragm and return spring for wear.
• The inside of the brake chamber for corrosion.*
Replace if corroded.
• The pushrod assembly for damaged threads:
Install or Connect (Figures 17 and 18)
1. Return spring (3) into the service housing assembly
(
2
).
Figure 15—Caging the Anchorlok Spring Brake
Chamber
3. Diaphragm (5).
4. Clamp ring (8). .
• Align the marks made during disassembly.
N O T IC E : S e e “N o tic e ” o n p a g e 51-1.
5. Bolts (9) and nuts (20).
Tighten
• Nuts (20) to 34 N-m (25 ft. lbs.);
2. Service Housing
3. Pushrod Return Spring
4. Pushrod
5. Service Brake Diaphragm
18. Spring Brake Diaphragm
23. Compression Spring
25. Plug
53. Spring Brake Housing -
.' ■' - F9576
Figure 17—Anchorlok Gold Seal Spring Brake
Chamber