Section 4 · Pages 181–256 (76 pages)

Brakes

From the 1952–1954 GMC Truck Models 620–980 Maintenance Manual

Five sections on hydraulic brakes, air brakes, air compressor and governor, hand brakes and brake specifications. Hydraulic coverage includes system and vacuum tests, bleeding, master cylinder, wheel cylinders, Hydrovac power unit overhaul and Bendix and Midland trailer hand control valves. Air brake coverage includes application, relay, quick release, limiting and check valves, brake chambers and slack adjusters; the compressor section covers compressor and governor testing, valve grinding and repair. Hand brakes are the external band and Tru-Stop disc types.

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What this section covers

  • Hydraulic brake system tests and bleeding
  • Hydrovac power unit
  • Bendix and Midland trailer hand control valves
  • Air brake valves, chambers and slack adjusters
  • Air compressor and governor repair
  • External band and Tru-Stop hand brake adjustment
  • Brake specifications
Year
1952, 1953, 1954
Make
GMC
Vehicle
Heavy Duty Trucks, Trucks
Type
Service Manual
Models
Series 620, 630, 660, 670, 740, 750, 850, 920, 930, 950, 970, 980 (gasoline and diesel, incl. D, F, W prefixes)
Publication
Form X5404
Pages
576

What’s inside

Front matter

  1. Introduction, Model Data and IndexesCover, warranty, title page with the Quick Index tabs, how to use the manual, the model data table of series, wheelbases and engine types for 1952–1954, serial number and parts identification plate locations, the section index and the alphabetical index.pp. 1–10

Maintenance manual

  1. 1Front Axlepp. 11–22
  2. 2Rear Axlepp. 23–156
  3. 3Cab and Bodypp. 157–180
  4. 4Brakespp. 181–256
  5. 5Clutchpp. 257–267
  6. 6Cooling Systempp. 268–285
  7. 7Electricalpp. 286–342
  8. 8Enginepp. 343–384
  9. 11Framepp. 385–388
  10. 12Fuel Systempp. 389–422
  11. 13Lubricationpp. 423–448
  12. 16Steeringpp. 449–476
  13. 17Transmissionspp. 477–552
  14. 18Propeller Shaftspp. 553–560
  15. 19Hubs, Wheels and Tirespp. 561–572

Special tools

  1. Special Toolspp. 573–576

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