TM 55-2840-251-23
Section VIII GENERAL MAINTENANCE PROCEDURES (Continued)
1-77 CLEANING (Cont) 3. Compressor Wash (Cont)
e.
Performance Recovery Motoring Wash (Cont)
(10)
Open supply valve and inject cleaning
solution.
(11)
Immediately commence motoring the
engine with the starter, while injecting the fluid for a
period not to exceed 30 seconds.
(12)
Allow a soaking period of 15 minutes (30
minutes maximum).
(13)
Open supply valve to inject 1-1/4 gallons
of rinse water. A rinse solution of equal parts potable
water and alcohol is recommended for temperature of
35F to -20F.
(14)
Motor the engine over, while injecting
rinse water for a maximum of one minute.
(15)
Allow starter to cool for 3 minutes.
(16)
Repeat
rinse
cycle
(steps
(13)and
(14))only one time.
(17)
Allow starter to cool for 5 minutes.
(18)
Perform motoring cycle to dry out the
engine for a maximum of one minute.
CAUTION
Starter should be allowed to cool for
at least 30 additional minutes prior to
using again.
f.
Salt Removal Motoring Wash
WARNING
OPERATION
OF
AIRCRAFT
ON
GROUND Engines shall be started
and operated only by authorized
personnel.
CAUTION
Use of correct mixture (Refer to Table
4) is very important, not only when the
temperature is below freezing at the
time of rinsing, but also if the
temperature is expected to be low
between the time of washing and the
next start.
NOTE
To prevent deposits caused by the use
of hard water, engine must be allowed
to cool to below 150F. Minimum
cooling period of 40 minutes must be
allowed
since
engine
was
last
operated.
(1)
Connect wand or wash ring to supply from
wash rig.
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