TM 55-4920-394-13&P
4-16. Removal And Installation Of Structural Housing .
(Refer to
Fig. 1-1). Remove and install housing as
follows:
a.
Attach-suitable lifting device to lifting eyes on top of housing.
b.
Release latches securing housing to structure.
c.
Lift housing while carefully guiding to prevent it from damaging functional components during
removal.
d.
Install housing in the reverse order of removal.
4-17. High Pressure Filter.
NOTE
Hydraulic filter elements shall be replaced at periodic service intervals or
anytime corresponding gage or warning light indicates excessive
differential pressure.
4-19. Testing High Pressure Filter .
a.
b.
Install an AN814-12 fitting with a boss seal in place of the element onto the threaded connection in
the filter head and install filter bowl. Do not install elements for this test.
c.
Check the reset button to determine that it is depressed.
d.
Apply minimum hydraulic pressure, 84 psig to inlet port of filter. If switch does not actuate warning
light, increase to maximum 115 psig. Switch is preset for 100 15 psig.
e.
During above test, after switch has actuated, depress red reset button, the warning light should go
off. When reset button is released, it should rise and the warning light should illuminate. Reduce
pressure to zero and depress reset button. The warning light should go off and the, reset button
remain depressed.
f.
There should be continuity between switch connector pins B and A. Pin A on light should be
connected to "ON" side of stand ignition switch and pin "C" to ground. Pin A on pressure switch
should be connected to Pin B on panel light; pin C to ground, leaving pin B on switch open.
CAUTION
Do not exceed the current ratings of the differential pressure switch: 5 amp
at 110V ac, 28V dc (resistive), 3 amp 110V ac, 28V dc (inductive).
4-3