BRAKES 5-63
Leakage Tests
1. Apply truck brakes and check for leakage at hand
control valve exhaust port, using soap suds.
2. Apply trailer brakes only with hand control valve
and check for leakage at truck brake application
valve exhaust port, using soap suds.
3. Leakage of a one inch bubble in one second is per
missible in either of these tests. If leakage exceeds
this specification, replace the shuttle valve.
EMERGENCY AIR VALVE AND
BREAKAWAY VALVE
Operating Tests
1. Pull out emergency air valve knob to exhaust air
pressure from breakaway valve control line. Dis
connect trailer emergency line from emergency out
let port at breakaway valve and connect an air
pressure test gauge to emergency outlet port.
2. Start engine and build up air pressure in system.
Low air pressure buzzer should stop operating at
approximately 60 psi. With air pressure in operating
range, push emergency air valve knob in. Test gauge
should show full air system pressure. Then pull knob
out; test gauge should drop to zero.
3. Again build up air pressure in system to operating
range, then stop engine. Push emergency air valve
knob in. Make a series of brake applications until
low air buzzer sounds. Slightly open drain cock in
the dry air tank to obtain a slow (approx.
1 0
psi per
minute) pressure drop in the tractor brake system.
When truck air system drops to 45 psi (approx.) the
emergency air valve knob should automatically come
out and pressure on test gauge should rapidly drop
to zero.
Leakage Tests
1. Build up air pressure in truck brake system to oper
ating range. Push in emergency air valve knob to
charge trailer brake system. Use soap suds to coat
exhaust ports of emergency air valve and breakaway
valve.
2. When emergency air valve leaks excessively, install
new piston O-rings. When breakaway valve leaks
excessively, install new O-rings and plunger seal.
Fig.
99—A irbrake Hand Control V a lv e
1. Bolt
8. V a lv e Body
14. Spring
20. C over
2. Lock Washer
9. V a lv e Return Spring
15. Cam
21. N u t
3. Bracket
10. V a lv e Spring Retainer
16. Cam Shaft
22. O perating Lever
4. End Cap
11. Piston Return Spring
17. Cam Housing
23. Name Plate
5. Seal
12. Piston Cup
18. Adjusting Bearing
24. Lock Washer
6. N ut
13. Piston
19. C o lla r
25. Screw
7. V a lv e Disc
CHEVROLET TRUCK SERVICE MANUAL
Summary of Contents for 10 Series 1967
Page 1: ...CHASSIS V3 a n s W U gw...
Page 2: ......
Page 28: ......
Page 80: ...BODY IB 18 Fig 41 Exploded View of Level Ride Seat CHEVROLET TRUCK SERVICE MANUAL...
Page 89: ...BODY IB 27 CHEVROLET TRUCK SERVICE MANUAL...
Page 105: ...BODY IB 43 Fig 94 Check Link Assembly Typical CHEVROLET TRUCK SERVICE MANUAL...
Page 117: ...BODY IB 55 Fig 116 A uxiliary Seat CHEVROLET TRUCK SERVICE MANUAL...
Page 121: ...Fig 4 1 0 3 0 Series Truck Frame...
Page 122: ...Fig 5 4 0 6 0 Single A xle Truck Frames Exc T ilt Cab FRAME 2 4...
Page 124: ...CHEVROLET TRUCK SERVICE MANUAL 1 Ficu 7 4 0 6 0 Series T ilt Cab Truck Frames FRAME 2 6...
Page 228: ...BRAKES 5 12 TD 50 60 Fig 23 Parking Brake Cables T Models CHEVROLET TRUCK SERVICE MANUAL...
Page 280: ......
Page 324: ...I I...
Page 336: ...ENGINE FUEL 6M 12 CHEVROLET TRUCK SERVICE MANUAL...
Page 342: ......
Page 348: ......
Page 386: ......
Page 393: ...CHEVROLET TRUCK SERVICE MANUAL CLUTCHES AND TRANSMISSIONS 7 7...
Page 472: ...STEERING 9 18 Fig 31 Typical Power Steering Hose Routing CHEVROLET TRUCK SERVICE MANUAL...
Page 474: ...w j...
Page 486: ......
Page 500: ...1...
Page 502: ...l c t r iC al 12 2...
Page 568: ......
Page 576: ......
Page 580: ...1...
Page 587: ...SPECIFICATIONS 7 ENGINE SECTION 6 8 25 1 on CE TE400 Series CHEVROLET TRUCK SERVICE MANUAL...
Page 590: ...SPECIFICATIONS 10 ENGINE TORQUES CHEVROLET TRUCK SERVICE MANUAL...