THRUSH AIRCRAFT, INC – MODEL S2R-R1340
AIRCRAFT MAINTENANCE MANUAL
2-14
Effective 01/01/08
the equivalent. Heating the mixture to a
temperature of 38ºC to 104ºC (100ºF to
220ºF) is desired to remove moisture and
to facilitate application. Use only dry
filtered air when spraying. See Table 2-1
(8 sheets) for detailed engine preservation
procedures.
Table 2-1: ENGINE PRESERVATION PROCEDURES
Engine Installed:
OPERATION PROCEDURE
10 to 30
Days
Over 30
Days
Engine
not
Installed:
Cleaning
Engine
Before washing the engine, look for oil leaks
which may indicate loose connections, packings,
or nuts. Wash the engine externally with a
cleaning solvent, removing all oil, grease and dirt.
NOTE:
Keep cleaning fluid away from the
magnetos and ignition manifolds.
X
Preliminary
Preservation
While the engine is still warm from running, drain
the oil from the engine and oil tank. Remove the
pressure oil screen; thoroughly clean and
reinstall all parts removed to facilitate draining.
Fill the oil tank with enough corrosion
preventative mixture to ensure adequate
lubrication during the preservation run plus the
quantity needed to preserve the induction
system. Prepare the engine for preservation of
the induction system as follows: join together two
separate 10 foot lengths of number 6 hydraulic
hose by means of a suitable two way valve.
Remove the pressure oil screen cover drain plug
hole and in an appropriate opening in the
supercharger case (such as the alternate
manifold pressure gage connection). Connect
the hydraulic hose between the two fittings. If
desired, the control valve may be located in the
cockpit and be manipulated by the operator or his
assistant. (This method affords the use of the
same preservative compound contained in the
engine oil system during the preservation run and
this eliminates the need of a supplementary tank
for preserving the induction system). Make sure
that the control valve is in the closed position.
Block off or by-pass the oil cooler to produce a
minimum oil inlet temperature of 95ºC (203ºF)
during the preservation run.
CAUTION:
Do not exceed 120ºC (250ºF) oil inlet
temperature.
X X
