Chevrolet 70 1969 Series, Shop Manual

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POWER BRAKE 5-19
From A p p lic a t io n V a lv e
From
T w o - W a y
V a lv e
1 O-rings
2 Valve Piston
3 Valve Body
4 Inlet Valve
5 O-ring
6 Exhaust Valve
7 Valve Cover
T-956
F igure 1 9 — Front B ra ke Lim itin g V a lv e a n d Q u ick R elease V a lv e
9. Remove piston return spring from body.
10. Remove end cap and O-ring from body. Rem ove O-
ring from end cap.
11. Remove elastic stop nut from inlet and discharge
Instrument Panel
Dash Plate
Fulcrum Pin
Control Lever
Exhaust Port
Body
Valve Disc
Valve Spring
9 O- ring
10 Cap Nut
11 Inlet from Application
Valve
12 Outlet to Limiting Valve
13 Plunger Spring
14 Plunger
1 Knob
2 Piston
3 Piston O-rings
4 End Cap O-ring
Supply
Port
Exhaust
Port
5 Piston Springs
6 End Cap
7 Body
TPM-7556
Figure 2 0 — T w o -W ay Control Valve
Figure 2 1 — Trailer E m e rge n c y Air V a lv e -T ilt C a b
valve assembly. Rem ove inlet valve disc assembly.
12. Rem ove discharge valve assembly from body.
13. Rem ove discharge valve return spring from body.
ASSEMBLY
1. Position discharge valve return spring in body.
2. Install discharge valve assembly in body.
3. C om press discharge valve return spring, install inlet
valve disc assem bly in valve body and secure with
elastic stop nut.
4. Install O-ring on end cap and install end cap in body.
5. Install piston return spring in body.
6. Install block vee on piston and install piston assembly
in valve body.
7. Install graduating spring in valve body.
8. Install adjusting bearing in cam housing.
9. Install cam and cam shaft in cam housing and place
assembly in position on valve body. Align scribe
m arks at disassembly. Secure by installing collar.
10. Install lever assem bly and secure with lock nut.
11. Install cover and nam e plate. Secure with cover
screw.
LIMITING Q U ICK RELEASE VALVE
OVERHAUL (Fig. 19)
DISASSEMBLY
1. Remove cap screws and lock washers which secure
valve cover to valve body. Separate cover and body
and discard O-ring (5).
2. Push valve carrier with inlet and exhaust valve assem ­
bly out of valve body. Remove O-rings from grooves
in valve body and discard.
CHEVROLET SERIES 70-80 HEAVY DUTY TRUCK SH O P M A N U A L