Chevrolet 10 Series 1968, Service Manual

Page: 313 / 713

BRAKES 5-70
F ig . 106-Front Wheel Brake Assembly (Wagner)
3. Tighten reservoir mounting bolts and nuts and make
certain reservoir will not vibrate during service as
this will cause premature pressure line failure.
DRAIN COCKS
Removal
Apply wrench to the hexagon portion of the body only.
Unscrew and remove.
Disassem bly
1. Push down on spring washer.
2. Remove key pin.
3. Remove spring washer, spring and key.
C leaning and Inspection of Parts
Wash all metal parts in cleaning solvent.
If the key or body is badly scored, the complete drain
cock should be replaced.
Do not attempt to fit a new key in an old body or vice
versa.
Repairs
If slight leakage has been present due to a slight scor­
ing of the key or body, the key should be ground in with a
good grade of #400 grinding compound. Before the key is
again put in place, it should be given a light application of
a good grade of cup grease.
Assem bly
1. Insert key in body.
2. Place spring and spring washer over key.
3. Push down on spring washer and insert pin in key.
Installation
Using a wrench on hexagon portion of drain cock, screw
in place.
SAFETY VALVE
Rem oval
Unscrew complete valve from line fitting.
Disassem bly
Unscrew the spring cage (fig. 108) from the body of the
safety valve. Lift ball valve from body and remove
spring, spring seat, and release pin from spring cage.
Cleaning and Inspection of Parts
Clean all parts in cleaning solvent. Examine the ball
valve for signs of pitting or scratches. If any damage is
evident the safety valve should be replaced. Clean ball
valve seat thoroughly. Check the body and spring cage
for cracks. Be sure the exhaust port in the spring cage
is not plugged.
Assem bly
1. Place the ball valve in the body of the safety valve.
CHEVROLET TRUCK SERVICE MANUAL