|
| |
TM 9-2320-364-20-4
2-3176
5. HOOK ARM EXTENDS TOO FAR IN CHU MODE (AUTO).
INITIAL SETUP
1.
START
YES
NO
CHU jumper wire harness OK.
LHS operates in MAN HA
position.
LHS operates in MAN MF
position.
Proximity switch (hook arm up)
not adjusted correctly.
LED of proximity switch not
illuminated.
Wire 1466B of wire harness is
faulty.
Wire 1466B is faulty.
Proximity switch is faulty.
Wire 1465 is faulty.
Wire 1435 is faulty.
Wire 1495 is faulty.
Wire 1496 is faulty.
Relay R52 faulty.
Relay R51 faulty.
Wire 1474 of wire harness is
faulty.
Wire 1474 is faulty.
Wire 1472 is faulty.
Wire 1435 of wire harness is
faulty.
Wire 1435 is faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
2-38. CHU TROUBLESHOOTING (CONT)
Tools and Special Tools
Tool Kit, General Mechanic’s: Automotive
(Item 74, Appendix G)
Multimeter (Item 44, Appendix G)
Equipment Condition
Engine OFF, (TM 9-2320-364-10)
Parking brake applied, (TM 9-2320-364-10)
Wheels chocked, (TM 9-2320-364-10)
PLS is in container mode,
(TM 9-2320-364-10)
Is proximity switch properly
adjusted?
Adjust proximity
switch (Para 21-24).
Verify repair, go to
Step 17 of this Fault.
Proximity switch clearance test.
The proximity switch is used to
control the length of the hook arm
hydraulic cylinder extension in
CHU mode. If the clearance is
excessive, the switch will not
sense the presence of sensing
plate at the proper extension.
|
