Thrush Aircraft S2R-R1340 Maintenance Manual page 35

Table 2-1: ENGINE PRESERVATION PROCEDURES (Continued)
OPERATION
With the piston at the bottom of its intake
stroke, spray hot, 99ºC to 140ºC (210ºF to
220º F), corrosion preventive mixture into the
front spark plug hole of each cylinder and in
the same sequence as the firing order. This
spray should be deposited on the inlet valves
and the cylinder walls.
Rotate the propeller shaft at least six
revolutions to ensure piston ring coverage for
each cylinder, without turning the propeller
shaft, to cover the cylinder walls. Do not turn
the propeller shaft after this spraying of the
cylinders. If the shaft is turned the spraying
procedure must be repeated.
NOTE: Do not apply excessive amounts of
material. All that is necessary is a uniform
thin coating on all surfaces.
amounts of material do not contribute to the
preservation; they cause difficulty at the time
Cylinder
of depreservation and increase the chances
Treatment
of hydraulic lock.
It is of the utmost importance that personnel
entrusted with the cylinder spray operation
be properly trained in the techniques
required.
operator practice on dummy cylinders until
the desired even coat can be applied. The
type of spray pattern formed can be
observed by spraying into a suitable
receptacle. The recommended procedure
to be used by the operator is as follows:
a. Place the preservative mixture in the
b. Close the vessel and connect the gun
Effective: 01/01/08
THRUSH AIRCRAFT, INC – MODEL S2R-R1340
AIRCRAFT MAINTENANCE MANUAL
PROCEDURE
It is recommended that the
reservoir; heat to the correct operating
temperature; and
Premixing and preheating the compound
prior to placing it in the reservoir will be a
time saver.
and all lines.
Engine Installed:
10 to 30
Excessive
mix thoroughly.
Engine
not
Over 30
Installed:
Days Days
X X
2-17
X