SECTION VIII GENERAL MAINTENANCE PROCEDURES (Continued)
Engine cleaning is basically confined to
compressor salt removal or performance recovery
washes (paragraph 1-77. 3). However, an external
wash is recommended whenever the engine is
contaminated with salt.
To perform a compressor wash, the engine
is motored using the starter and washing fluids are
sprayed into the engine intake through a wash wand or a
high flow (2 to 3 gal. /min) 7. 57 to 11. 36 liters/min)
Motoring washes are carried out at an Ng of
14 to 25% and the water or cleaning mixture, which is
pressurized at 30 to 50 psi is sprayed into the
compressor inlet via the high-flow spray ring or wash
wand. Washing while motoring the engine insures that
the cleaning mixture remains in liquid form.
Depending on the operating environment, it
is recommended that the frequency of compressor
washing follow the directives contained in Table 1.
For cleaning of Specific Parts, refer to
paragraph 1-77. 4.
Engine External Wash
Before performing an external wash,
the engine must be allowed to cool for
a minimum of 40 minutes after
An external wash with fresh water is recommended
when the engine is contaminated with salt. The engine
must never be left for an extended period, such as
overnight, in a contaminated condition.
Wash wand or ring, 2 to 3 gpm flow
rate (refer to Appendix D)
Two stainless steel 5 gal. containers
Compressed air is dangerous when
person. The airstream or material blown
by the airstream can cause injury,
particularly to the eyes or face. Use
goggles to protect eyes and face.
DO NOT exceed 30 psig.
yourself or another person.
Compressed air or nitrogen supply
regulated up to 50 psig
Supply of drinking water. Criteria for
drinking water is as follows:
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