DETROIT DIESEL 53
Preventive Maintenance 15.1
Lubricate the throttle control mechanism every 200
hours or 6,000 miles with an all purpose grease. At
temperatures above +30F., use a No. 2 grade grease.
Use a No. 1 grade grease below this temperature.
Lubricate all other control mechanisms, as required, with
There is no scheduled interval for performing an engine
As long as the engine performance is
satisfactory, no tune-up should be needed. Minor
adjustments in the valve and injector operating
mechanisms, governor, etc. should only be required
periodically to compensate for normal wear on parts.
New drive belts will stretch after the first few hours of
operation. Run the engine for 15 seconds to seat the
assembly. If the slip rings are dirty, they should be
belts and retension. Then retighten new fan drive, pump
cleaned with 400 grain or finer polishing cloth. Never
drive and battery-charging generator drive belts
use emery cloth to clean slip rings. Hold the polishing
cloth against the slip rings with the generator in
operation and blow away all dust after the cleaning
operation. If the slip rings are rough or out of round,
Inspect the terminals for corrosion and
connections and the wiring for frayed insulation.
Check the specific gravity of the electrolyte in each cell
of the battery every 100 hours or 3,000 miles. In warm
weather, however, it should be checked more frequently
due toga more rapid loss of water from the electrolyte.
The electrolyte level should be maintained in
Lubricate the tachometer drive every 100 hours or 3,000
miles with an all purpose grease at the grease fitting. At
temperatures above +30 F., use a No. 2 grade grease.
Use a No. I grade grease below this temperature.
1972 General Motors Corp.
SEC. 15.1 Page 7