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Page Title:
Table 2-2. Direct/General Support Troubleshooting - continued |
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  TM
55-1730-229-34
AG
320A0-MME-000
TO
35C2-3-473-2
TM
1730-34/1
Table 2-2.
Direct/General Support Troubleshooting (continued)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
AIRCRAFT RESERVOIRS OVERFLOW (ON AIRCRAFT SERVICED WITH RETURN BYPASS VALVE SET
14.
TO BYPASS).
Shut down unit and check RETURN BYPASS selector for clogged condition:
Remove (paragraph 8-7.a.) and clean selector and clean
a.
manifold hole where RETURN BYPASS selector fits.
Inspect selector cartridge for signs of blockage (i.e.,
b.
lodged bits of packing). Replace selector cartridge if
necessary.
Replace selector packing.
c.
d.
Re-install RETURN BYPASS selector (paragraph 8-7.b.) and
verify operation.
PUMP EMITS HIGH PITCH WHINE ONLY WHEN SERVICING AIRCRAFT REQUIRING BACKPRESSURE
15.
AND WHEN THE RETURN BYPASS SELECTOR IS SET TO OFF.
Shut down complete unit and check RETURN BYPASS relief valve for stuck condi-
tion:
a. Disassemble module according to the procedure of paragraph
manifold (item 15, figure 8-14) attachments.
Remove RETURN BYPASS relief valve (1, figure 8-10) from top
b.
of main control manifold.
Clean manifold hole.
c.
d.
Install new RETURN BYPASS relief valve (with new packing) in
manifold.
e. pressure test manifold (paragraph 8-21).
Reassemble module according to paragraph 8-18 starting with
f.
step k.
16.
HYDRAULIC FLUID PRESENT IN VENT DRYER (RED FLUID IN DESICCANT AND BELOW VENT
DRYER).
Shut down complete unit. Remove and replace 0.5 PSI check valve
2-10
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