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
HYDRAULIC SYSTEM PRESSURE CANNOT BE RELEASED AT END OF HYDRAULIC SERVICING
12.
OPERATION (continued)
c. Replace valve packing.
Re-install HIGH PRESSURE BYPASS valve (paragraph 8-7.b.) and
d.
verify operation.
AIRCRAFT INDICATOR SHOWS THAT NO BACK PRESSURE IS APPLIED WHEN RETURN BYPASS
13.
SELECTOR SET TO OFF.
Step 1.
Shut down complete unit and check RETURN BYPASS selector:
a. Remove (paragraph 8-7.a.) and clean selector and clean
manifold hole where RETURN BYPASS selector fits.
Inspect selector cartridge for nicks, scratches or broken
b.
packing. Replace selector cartridge if necessary.
c. Replace selector packing.
Re-install RETURN BYPASS selector (paragraph 8-7.b.) and
d.
verify operation.
Step 2.
Check RETURN BYPASS relief valve:
Disassemble module according to the procedure of paragraph
a.
Remove RETURN BYPASS relief valve (1, figure 8-10) from top
b.
of main control manifold (15, figure 8-14).
Clean manifold hole.
c.
Install new RETURN BYPASS relief valve (with new packing) in
d.
manifold.
Pressure test manifold (paragraph 8-21).
e.
Reassemble module according to paragraph 8-18 starting with
f.
step k.
2-9
