DETROIT DIESEL 53
ENGINE OPERATING INSTRUCTIONS
It is recommended that the engine lubricating system be
PREPARATION FOR STARTING ENGINE
charged with a pressure prelubricator, set to supply a
minimum of 25 psi oil pressure, to ensure an immediate
Before starting an engine for the first time, carefully
flow of oil to all bearings at the initial engine startup.
read and follow the instructions in Sections 13 and 14 of
The oil supply line should be attached to the engine so
this manual. Attempting to run the engine before
that oil under pressure is supplies to the main oil gallery.
studying these instructions may result in serious damage
to the engine.
With the oil pan dry, use the prelubricator to prime the
engine with sufficient oil to reach all beating surfaces.
NOTE: When preparing to start a new or
Use heavy-duty lubricating oil as specified under
overhauled engine or an engine which has been
Lubricating Oil Specifications in Section 13.3. Then
in storage, perform all of the operations listed
remove the dipstick, wipe it with a clean cloth, insert and
below. Before a routine start (at each shift), see
remove it again to check the oil level in the oil pan. Add
Daily Operations in the Lubrication and
sufficient oil, if necessary, to bring it to the full mark on
Preventive Maintenance Chart, Section 15.1.
the dipstick. Do not overfill.
If a pressure prelubricator is not available, fill ;he
crankcase to the proper level with heavy-duty lubricating
Install all of the drain cocks or plugs in the cooling
oil as specified under Lubricating Oil Specifications in
system (drain cocks are removed for shipping).
Section 13.3. Then prelubricate the upper engine parts
by removing the valve rocker covers and pouring
Open the cooling system vents, if the engine is so
lubricating oil, of the same grade and viscosity as used
Remove the filler cap and fill the cooling system with
clean, soft water or a protective solution consisting of
high boiling point type antifreeze, if the engine will be
If the engine is equipped with oil bath air cleaners, fill
exposed to freezing temperatures. Keep the liquid level
the air cleaner oil cups to the proper level with clean
about two inches below the filler neck to allow for fluid
engine oil. Do not overfill.
Use a quality rust inhibitor if only water is used in the
Fill the fuel tank with the fuel specified under Diesel
Fuel Oil Specifications in Section 13.3.
Close the vents, if used, after filling the cooling system.
The lubricating oil film on the rotating parts and bearings
of a new or overhauled engine, or one which has been
in storage, may be insufficient for proper lubrication
when the engine is started for the first time.
1972 General Motors Corp.
SEC. 13.1 Page 1