TM 55-1520-240-23-3
4-145
ENGINE COMPRESSOR WATER WASH PROCEDURE
(Continued)
4-145
Methanol (E243) is flammable and
toxic. Use only with adequate
ventilation. Keep away from heat,
sparks, or open flame. Do not inhale.
Do not contact eyes, skin, or clothing.
In case of contact, immediately flush
skin or eyes with water for at least
15 minutes. Get medical attention
for eyes.
NOTE
This procedure is to be used only for
the cleaning of salt deposits, and as
an alternate cleaning procedure when
water soluble compressor cleaners
(E466 or E467) or solvent (E162) are
not available.
At an ambient temperature of below
35ºF (2ºC), use a 40 percent
methanol (E243) and 60 percent
water mixture to prevent line freezing.
Procedure is same for No. 1 or No. 2
engine wash. No. 1 engine shown.
1.
Start portable cleaning and preservation unit (1)
(T-26). (Refer to vendor manual.)
2.
Set main air regulator (2) to 100 psi. Adjust
customer air source (3) to 60 psi to close bleed
band.
3.
Position WATER valve (4) to OPEN.
4.
After 10 seconds, motor engine for 30 seconds.
5.
Stop motoring the engine, and position WATER
valve (4) to CLOSE.
6.
During engine coastdown, position AIR/PURGE
valve (5) to OPEN until lines are purged of water,
then position AIR/PURGE valve (5) to CLOSE.
7.
Inspect compressor for cleanliness, repeat steps
3 thru 7 if necessary.
INSPECT
8.
Decrease compressed customer air source (3) to
zero to open bleed band.
9.
Start engine and run at idle for two minutes
minimum to dry out engine.
10.
Shut down engine and portable cleaning and
preservation unit (1). (Refer to vendor manual.)
FOLLOW-ON MAINTENANCE:
Perform engine compressor preservation procedure
(Task 4-146).
END OF TASK
4-481
