Chevrolet 1988 Light Duty Truck Repair Manual page 322

5-8 BRAKES
Body
24.
Spring
25.
Secondary Piston
28.
Prim ary Piston A sse m bly
30.
Snap Ring
31.
Figure 15— Cast Iron Master Cylinder
Com ponents
A stained or discolored cylinder bore with crocus
cloth.
Inspect
Diaphragm for cuts, cracks, or a swollen condition.
Cylinder bore for scoring or corrosion. If corrosion is
present, replace the cylinder. Do not attempt to hone
0
the bore.
♦ 3 Install or C o n n e c t (F ig u re 19)
• Lubricate all the seals and cylinder bore with clean
brake fluid.
1. Secondary spring (48).
2. Secondary piston assem bly (49).
3. Piston return spring (50).
S pring R etainer
26.
Prim ary Seal
27.
S econdary P iston
28.
Secondary Seals
29.
Figure 16— Secondary Piston Assembly
4. Primary piston assembly (51) and snap ring (52).
• The prim ary piston m ust be depressed to
install the snap ring.
5. O-ring (55) and springs (47).
6
. Valve poppets (46) and com pensating valve seals
(45).
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• Depress and hold the prim ary piston assem bly
with a smooth rounded end tool.
7. Reservoir (44).
NOTICE: See " N o tic e " on p a ge 5-1 o f th is
s e ctio n .
8 . Bolts (54).
T ig h ten
• Bolts to 18 N m (13 ft. lbs.).
9. Diaphragm (42) into the cover (41).
10. Cover (41).
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