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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
CANNOT APPLY HYDRAULIC PRESSURE TO AIRCRAFT (continued)
2.
Step 3.
Disconnect wire C119B20 from TB2-3. Check for continuity between
TB2-10 and the loose end of wire C119B20.
If continuity, do step 4. Reconnect wire.
a.
If no continuity, disassemble module and replace solenoid
b.
valve (66, figure 8-14). Perform steps a. through w. of
Step 4.
Remove and clean dual manifold BYPASS/FLUSH valve (paragraph 8-14).
Clean the dual manifold hole where valve fits. Inspect valve for
nicks, scratches, or broken packing.
a.
If valve is defective, replace valve and packing, and verify
operation.
b.
If valve appears good, re-install valve using new packing,
and verify operation. If malfunction still exists, shut down
unit and do step 5.
Step 5.
Remove and disassemble module by performing steps a. through x. of
Clean clogged orifice and screen (15, 22, figure 8-10) between pilot
valve and load valve. Replace pilot valve block (66, figure 8-14)
per paragraph 8-11.c.(4). pressure test manifold (paragraph 8-21)
Reassemble module and verify operation per paragraph 8-18, starting
with step k.
PUMP EMITS HIGH PITCH WHINE WITH LOSS OF PRESSURE AT HIGH PRESSURES.
3.
Step 1.
Shut down complete unit and check RETURN BLEED valve:
a.
Remove (paragraph 8-7a.) and clean valve, and clean the
manifold where RETURN BLEED valve fits.
Inspect valve cartridge for nicks, scratches, or broken
b.
packing. Replace valve if necessary.
Replace valve packing.
c.
Re-install RETURN BLEED valve (paragraph 8-7.b.). Verify
d.
operation.
2-4
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