DETROIT DIESEL 53
Preventive Maintenance 15.1
Item 18
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
engine oil.
Item 19
There is no scheduled interval for performing an engine
tune-up.
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.
Item 20
New drive belts will stretch after the first few hours of
Item 15
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,
replace them.
Inspect the terminals for corrosion and
loose
connections and the wiring for frayed insulation.
Item 16
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
accordance
with
the
battery
manufacturer's
recommendations.
Item 17
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.
Item 17
1972 General Motors Corp.
July, 1972
SEC. 15.1 Page 7
