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TM 1-4920-446-13 & P
Table 3-6. Troubleshooting Chart (Contd)
Malfunction
Inspect
Corrective Action
aircraft system specified.
Check operating procedures in
Chapter 2
High pressure relief
If inoperative, replace
valve
valve. See para. 3-67, 3-68,
and Figure C-10.
.:
High pressure relief
Relief valve cone not
If chattering persists, re-
valve chattering
seated properly due to
place valve. See para. 3-68,
dirt or foreign matter
and Figure C-10.
lodged between cone
and seat
Test stand inoperative
Check main power cable
Ensure cable end fully seated
in receptacle. Ensure
receptacle has electricity.
Main circuit breaker
Reset if tripped.
CB1
.
Fuse (F1)
Remove and check fuse (F1).
Replace if defective.
Magnetic Starter
Reset L1, L2, or L3 if
tripped.
Hydraulic pump motor
Defective circuit
Replace faulty circuit
inoperative
breaker
breaker.
Overload activated
Reset or Replace overload
(will shutdown test
as necessary. Check motor
stand)
for cause of fault. Remove
per para. 3-51 and replace
if necessary.
Control circuit inopera-
Fuse (F1)
If blown, replace fuse.
tive
Figure C-4. Check for use
of overload. Repair fault.
Input wiring connected
Check input wiring to ensure
improperly
it conforms to Figure 1-5
for 220 or 440 volts.
Indicator lights do not
Fuse (F1)
If blown, replace fuse. Figure C-4.
illuminate
Check light sockets
and wiring for shorts.
3-11
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