TM 5-3820-245-14&P
SECTION IV
OPERATING INSTRUCTIONS
ENGINE OPERATING INSTRUCTIONS
PREPARATION FOR STARTING ENGINE FIRST TIME
Before starting an engine for the first time, carefully read and follow these instructions. Attempting to run the engine before
studying these instructions may result in serious damage to the engine.
NOTE: When preparing to start a new or overhauled engine or an engine which has been in
storage, perform all of the operations listed below. Before a routine start (at each shift),
see Daily Operations in the Lubrication and Preventive Maintenance Chart.
Cooling System
Install all of the drain cocks or plugs in the cooling system (drain cocks are removed for shipping).
Open the cooling system vents, if the engine is so equipped.
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 exposed to freezing temperatures. Refer to Engine Coolant. Keep a liquid level
about two inches below the filler neck to allow for fluid expansion.
Close the vents, if used, after filling the cooling system.
On marine installations, prime the raw water cooling system and open any sea cocks in the raw water pump intake line.
Prime the raw water pump by removing the pipe plug or electrode provided in the pump outlet elbow and pour water in the
pump.
NOTE:
Failure to prime the raw water pump may result in damage to the pump impeller.
Lubrication 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.
It is recommended that the engine lubricating system be charged with a pressure prelubricator, set to supply a minimum of
25 psi (172 kPa) oil pressure, to ensure an immediate flow of oil to all bearings at the initial engine start-up. The oil supply
line should be attached to the engine so that oil under pressure is supplied to the main oil gallery.
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