Section XXXIII. SECONDARY FUEL FILTER

Figure 3-38.1 Electronic Starter Removal

Figure 3-39. Secondary Fuel Filter Assembly

TM-5-6115-545-12 Power Unit Utility Pack Gas Turbine Engine Driven (Air Research Model PPU85-5) Non-Winterized and (Air Research Model PPU85-4) Winterized Manual
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(~) Reconnect electrical lead using nut, lock- waaher, and flat washer. 3 - 1 9 4 . L o w O i l P r e s s u r e S h u t d o w n S w i t c h . See f i g u r e 3 - 3 and proceed as follows: a. Inspection. Inspect the switch ( 1 6 , f i g . 3 - 3 ) for loo~e mounting, loose connector, dents, and other damage. Q. Testing. To test the switch ( 1 6 , f i g . 3 - 3 ) , discon- nect the connector and connect a multimeter between pins B and C of the switch and verify continuity. Then connect multimeter between pins A and D and verify open circuit. If switch does not check out properly, replace switch. c. Replacement. Replace switch ( 1 6 , f i g . 3 - 3 ) as folbws : (1) Removal. (Q) Disconnect connector from switch ( 16), (Q) Unscrew switch ( 16) from nipple ( 17). (2) Installation. Screw switch ( 1 6 , f i g . 3 - 3 ) into nipple (17 ) and tighten to 20 foot-pounds. Reconnect connector to switch. 3 - 1 9 6 . G e n e r a l . T M 5 - 6 1 1 5 - 5 4 5 - 1 2 T O - 3 5 C 2 - 3 - 4 4 4 - 1 N A V F A C P - 8 - 6 2 6 - 1 2 T M - 0 0 0 3 8 G - 1 2 3 - 1 9 5 . O i l F i l t e r A s s e m b l y . ~. Replacement. To replace the oil filter assembly, see f i g u r e 3 - 3 and remove and install as illustrated, while observing the following: (1) Drain oil system as described in p a r a g r a p h 3 - 4 c ( 3 ) and drain filter by removing plug ( 1 , f i g . 3 - 3) and draining into a suitable container. (2) Remove screw (5) and washer (6) and remove both filter bodies (7) and filter elements (8) as assem- blies from header (9). (3) Disconnect and tag oil line and electrical connections and remove screws (2) and washers (3) which secure header (9) to engine block. Remove straight connector (22) and gasket (4). (4) Install using a new gasket (4) and mount onto engine block with screws (2) and washers (3). Tighten center screw ( 5 ) to a torque of 45 to 50 foot-pounds. Replace straight connector and reconnect oil line and electrical connections (22 ). Q. Check the engine lube oil filter for oil leakage and be certain that filter body ( 7 ) and gasket ( 10) are properly installed. S e c t i o n X X X I I I . S E C O N D A R Y F U E L F I L T E R The secondary fuel filter is the final filtration device in the fuel system. It removes contaminated particles of five micron and larger from the fuel. 3 - 1 9 7 . R e p l a c e m e n t . To replace the secondary fuel filter, see f i g u r e 3 - 3 9 and proceed as follows: ~ Open drain cock (1). ~. Drain fuel into suitable container. (1) Removal. (~) Remove fuel lines to filter and remove elbows (2 and 3) from filter assembly (6). (Q) Remove four screws (4) and lockwashers (5) holding filter assembly (6) to bracket (9) and remove filter assembly (6). (g) Remove two screws (7) lockwashers (8) and washer (8A) and remove bracket (9) from engine, (2) Installation. (~) Close drain cock (1). (Q) Install bracket (9) and filter assembly (6) in the reverse order of removal. C h a n g e 9 3-94.1/(3-94.2 blank)

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