TM 5-3810-300-24&P-3
COOLING SYSTEM 5
4.
Run the engine for five minutes.
4.
Start and run the engine at a fast idle (1000 to 1200
rpm) for 30 minutes to one hour. Check the oil
5.
Drain the cooling system.
pressure frequently.
6.
Repeat Steps 3, 4, and 5.
5.
After the specified time, stop the engine and
immediately drain the crankcase and the filter.
7.
Fill the cooling system with clean water.
Sufficient time must be allowed to drain all of the
fluid.
8.
Let the engine run for five minutes.
6.
Refill the crankcase with SAE 10 engine oil after the
9.
Drain the cooling system completely.
drain plug is replaced, and run the engine at the
same fast idle speed for ten or fifteen minutes.
10. Install the engine thermostat.
Then, stop the engine and drain the oil thoroughly.
11. Close all of the drains and refill the cooling system
7.
Remove and discard the filter element, clean the
with fresh coolant.
filter shell, and install a new element.
LUBRICATION SYSTEM
8.
Install the drain plug and fill the crankcase to the
proper 'level with the oil recommended for normal
When the engine lubricating system has been
engine operation.
contaminated by an ethylene glycol antifreeze solution,
or other soluble material, the following cleaning
9.
To test the effectiveness of the cleaning procedure,
procedure, using Butyl Cellosolve, or its equivalent, is
it is recommended that the engine be started and
recommended.
run at a fast idle (1000 to 1200 rpm) for
approximately 30 minutes.
Then, stop and
immediately restart the engine.
There is a
CAUTION: Use extreme care in the handling
possibility that the engine is not entirely free of
of these chemicals to prevent serious injury to
contaminant deposits if the starting speed is slow.
the person or damage to finished surfaces.
Wash off spilled fluid immediately with clean
10. If the procedure for cleaning the lubricating oil
water.
system was not successful, it will be necessary to
disassemble the engine and to clean the affected parts
If the engine is still in running condition, proceed as
thoroughly.
follows:
1. Drain all the lubricating oil.
MAKE CERTAIN THAT THE CAUSE OF THE
INTERNAL COOLANT LEAK HAS BEEN CORRECTED
2.
Remove and discard the oil filter element. Clean
BEFORE RETURNING THE ENGINE TO SERVICE.
and dry the filter shell and install a new element.
3.
Mix two parts of Butyl Cellosolve, or its equivalent,
with one part of SAE 10 engine oil. Fill the
crankcase of the engine to the proper operating
level with the mixture.
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