TM 5-2420-231-10
0025
LEVEL A PREPARATION CONTINUED
e. If top of the tank is not coated with preservative because of an airlock, loosen sending unit to permit
preservative to reach all interior surfaces.
f.
Use drained preservative oil for processing other fuel tanks, provided not more than 10 percent of
fluid is fuel.
9. Fuel System.
a. Prior to processing engine, cool engine by induced air currents, circulation of engine coolant, or by
waiting period of time required to arrive at above specified temperature to ensure cylinder head
temperature measured at injector nozzle flange surface of all cylinders is no more than 100F
(38.7C).
b. Position portable container/line/device to provide preservative oil feed to engine.
c.
Disconnect fuel line and drain as much fuel as possible from all fuel lines, filters, heater, etc., in the
system.
d. Drain and flush fuel tank with preservative oil prior to processing engine.
e. Disconnect fuel line at a quick disconnect before fuel filters. If this is not practical, disconnect
between primary fuel filter and fuel pump at primary fuel filter outlet.
f.
Drain fuel from secondary fuel filter and primary fuel filter.
g. Remove filter element.
h. Disconnect residual machine fuel return line at quick disconnect coupling.
i.
Connect transparent plastic fuel line to engine end of disconnected fuel return line.
j.
Insert other end of plastic fuel line into recovery container to collect residual returned fuel/oil mixture.
k.
Start engine and run until preservative oil is flowing from fuel return line or until time established in
the EPDS for specific model machine elapses.
l.
Place throttle in half-open position and shut off engine by placing fabricated air restriction plate over
air intake until engine stops.
m. Fabricate air restrictor plate with a piece of plywood or similar material.
n. Cement piece of rubber 5/16 in. (7.9 mm) thick or other material that shall not damage engine to
plywood with adhesive.
10. Combustion Chamber. Cool engine by induced air currents, circulation of engine coolant, or by waiting
the period of time required to arrive at the above specified temperature to ensure that cylinder head
temperature measured at injector nozzle flange surface of all cylinders is not more than 100F (37.8C).
CAUTION
Specific cranking times should be specified on EPDS; if a short time period is not
specified, each cranking period should be at least 10 seconds but not more than 30
seconds. Special precautions shall be taken to ensure that these time limits are kept;
otherwise the engine starter or starter solenoid may be damaged.
Processing instructions should be detailed on the EPDS; if not, a general guide is as follows:
a. Throttle shall be placed at maximum open position and engine cranked with starter. Engine may fire,
but the air restrictor shall prevent engine from starting.
b. Allow starter to cool and repeat at least two times.
0025-3
