Quantcast HYDRAULIC OIL FOAMY (FRONT LOADER/FORKLIFT, BACKHOE/CRANE, AND HYDRAULIC TOOLS OPERATE ERRATICALLY)

 

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HYDRAULIC SUSPENSION LOCKOUT SYSTEM WILL NOT ENGAGE (HMMH).
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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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FORKLIFT WILL NOT MOVE (EMPTY).
TM 5-2420-224-20-1
Table 3-5. Troubleshooting (Cont)
Malfunction
Test or Inspection
Corrective Action
HYDRAULIC SYSTEM (CONT)
Step 3.
Check for loose and damaged hydraulic pump lines.
If hydraulic pump lines are loose or damaged, tighten loose
connections or replace hydraulic pump lines (pages 4-584,
4-590). If problem continues, notify direct support maintenance.
If hydraulic pump lines are not loose or damaged, replace hydraulic
tank filter (pages 4-709, 4-720).
99.
HYDRAULIC OIL FOAMY (FRONT LOADER/FORKLIFT, BACKHOE/CRANE, AND HYDRAULIC
TOOLS OPERATE ERRATICALLY).
Step 1.
Check for low oil level in front or rear hydraulic tank.
If oil level is low, add oil (TM 5-2420-224-10).
If oil level is not low, go to step 2.
Step 2.
Check for water in hydraulic oil.
If there is water in hydraulic oil, replace hydraulic oil
(TM 5-2420-224-10) and make sure fill caps are tight.
If there is no water in hydraulic oil, go to step 3.
Step 3.
Check for loose or damaged hydraulic pump lines.
If hydraulic pump lines are not loose or damaged, replace front
or rear hydraulic tank filter (pages 4-709, 4-720).
If hydraulic pump lines are loose or damaged, tighten loose
connections or replace hydraulic pump lines (pages 4-584,
4-590). If problem continues, notify direct support maintenance.
100. HYDRAULIC OIL OVERHEATS.
Step 1.
Check for low oil level in front or rear hydraulic tank.
If oil level is low, add oil (TM 5-2420-224-10).
If oil level is not low, go to step 2.
Step 2.
Check fan shroud for debris that could block air flow.
If there is debris in fan shroud, remove debris.
If there is no debris in fan shroud, perform Malfunction 74.
Change 2

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