ARMY TM 9-6115-464-34
AIR FORCE TO 35C2-3-445-2
NAVY NAVFAC P-8-624-34
WARNING
Compressed air used for cleaning and drying purposes can create airborne particles
that may enter the eyes. Pressure shall not exceed 30 psig and use only with adequate
chip guards and chipping goggles.
Failure to observe this warning could result in
servere personel injury.
(1) Clean exterior surfaces with dry cleaning solvent (Federal Specification P-D-680) and dry with
filtered compressed air.
(2) Flush interior of day tank with an approved solvent.
(3) Inspect day tank assembly for cracked or broken welds, dents, and damaged threads.
(4) Check interior of tank for scale formation and hardened sediment deposits.
(5) Test for leaks as follows:
(a) Plug all openings except one.
(b) Install a fitting and attach a compressed air line to the unplugged opening.
(c) Submerge day tank in a container of water and apply 5 psig air pressure.
(d) Check for bubble formations which will indicate leakage.
WARNING
Steam clean interior of day tank a minimum of two hours to dissipate residual fuel
vapors before attempting to repair welds. Serious injury or death may result from
failure to observe this warning.
Failure to observe this warning could result in servere
personel injury.
(6) Repair cracked or broken welds and leaks by welding.
(7) Repair damaged threads with a thread chaser.
c. Installation. Refer to the Operator and Unit Maintenance Manual for day tank installation instructions.
3-21. SECONDARY FUEL FILTER ASSEMBLY.
Refer to the Operator and Unit Maintenance Manual for secondary fuel filter assembly maintenance
procedures.
3-22. FUEL INJECTION PUMP ASSEMBLY.
a. General. The Roosa Master Fuel Injection Pump is mounted on the timing gear case and is gear driven
through an idler gear arrangement by the crankcase gear. The end thrust of the fuel injection pump gear and
shaft is controlled by a spring loaded thrust button located in the inspection cover on the timing gear housing
cover. It is advisable when removing or installing the fuel injection pump that the gear housing inspection cover
be removed from the timing gear cover to relieve the spring tension of the thrust button. The fuel injection pump
attaching flange holes are elongated to permit accurate adjustment of the fuel pump timing.
b. Removal.
CAUTION
Thoroughly clean the fuel injection pump prior to removal. Cap or plug all fittings and
lines to prevent dirt from entering the pump and fuel system. Failure to observe this
caution could result in equipment damage.
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