THRUSH AIRCRAFT, INC – MODEL S2R-R1340
AIRCRAFT MAINTENANCE MANUAL
2-18
Effective 01/01/08
Table 2-1: ENGINE PRESERVATION PROCEDURES
(Continued)
Engine Installed:
OPERATION PROCEDURE
10 to 30
Days
Over 30
Days
Engine
not
Installed:
Cylinder
Treatment
(Continued)
c. Discharge the gun into a clean container
until a uniform spray is produced at the
nozzle. The mixture discharged during
this operation should be retained for the
final operation.
d. Insert the discharge tube of the gun into
the cylinder and determine the position
of the piston. Use the free hand to mark
the distance the gun will travel into the
cylinder to come to a point just short of
the piston. Withdraw the gun tube until
the nozzle is at the spark plug opening.
e. Start spraying. As soon as the target is
pressed move the gun so that the nozzle
will travel slowly from the spark plug
opening to the piston, but without
touching the piston head, then back to
the spark plug opening where the trigger
should be released immediately.
f. Proceed at once to spray each of the
remaining cylinders in the same manner.
If the spray gun will be idle more than
one minute, repeat step c. to ensure that
a slug of cold preservation compound is
not ejected, and that a fine even spray is
obtained.
X X X
Dehydrator
plugs
Install dehydrator plugs in the spark plug
holes of all cylinders and tighten them to the
recommended torque. Do not remove the
moisture seals from the plugs until ready to
install. On those engines incorporating a
front crankcase breather, disconnect the
breather and install a dehydrator plug in the
case. On those engines not incorporating a
front crankcase breather, remove the
governor, install a governor pad shipping
gasket and cover, then install a dehydrator
plug in the cover.
Install dehydrator plugs in all suitable
openings in the main, collector and rear
crankcases.
X X X
