Quantcast HYDRAULIC SUSPENSION LOCKOUT WILL NOT ENGAGE (HMMH) (REG. NO. UC053E THRU UC053K) cont'd -680640377

 

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HYDRAULIC SUSPENSION LOCKOUT WILL NOT ENGAGE (HMMH) (REG. NO. UC053E THRU UC053K) cont'd -680640376
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TM-5-2420-224-20-1 Tractor Wheeled 4x4 DED Small Emplacement Excavator (SEE) and High Mobility Material Handler (HMMH) Manual
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HYDRAULIC SUSPENSION LOCKOUT WILL NOT ENGAGE (HMMH) (REG. NO. UC053E THRU UC053K) cont'd -680640378
TM 5-2420-224-20-1
Table 3-5. Troubleshooting (Cont)
Malfunction
Test or Inspection
Corrective Action
ELECTRICAL SYSTEM (CONT)
Step 27. Disconnect connector AB (24) and check wire (36), on relay side of
connector, for continuity to ground.
If short to ground, repair wiring (36) between fast group relay
and connector AB.
If open to ground, reconnect connector AB and go to step 28.
Step 28. Disconnect cab floor separation point (25) and check wire (36), on cab side
of connector, for continuity to ground.
If short to ground, repair wiring (36) between connector AB and
cab floor separation point.
If open to ground, reconnect cab floor separation point and go
to step 29.
Step 29. Disconnect intermediate speed shift and indicator switch connector (37) and
check wire (36) for continuity to ground.
If open to ground, replace intermediate speed shift and
indicator switch (38) by removing switch and washer (39).
If short to ground, repair wiring (36) between cab floor
separation point and intermediate speed shift and indicator
switch connector.
Step 30. Check for +24 VDC between wire (40) and ground at motor relay (22).
If +24 VDC is present, go to step 37.
If +24 VDC is not present, go to step 31.
Step 31. Check for +24 VDC between wire (40) and ground at fuse box 3 (41).
If +24 VDC is present, repair wiring (40) between motor relay
and fuse box 3.
If +24 VDC is not present, go to step 32.
Step 32. Check for +24 VDC between wire (42) and wire (43) and ground at fuse
box 3 (41).
If +24 VDC is present, replace 16 amp fuse.
3-247

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