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TM 5-2420-222-34
Table 2-1. Troubleshooting (Con’t).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step 4.
Check steering valve for worn, damaged, or locked control sleeve and spool.
Replace steering valve (see paragraph 11-3).
HYDRAULIC SYSTEM
NOTE
Use the following malfunction to troubleshoot inoperative loader boom, loader
bucket, backhoe boom, dipperstick, and crowd or Jaw cylinders.
29.
CYLINDER FAILS TO WORK.
Perform hydraulic system test (see paragraph 14-1). Check for worn, damaged, or inoperative hydraulic
pump.
Repair or replace hydraulic pump assembly (see paragraph 14-3).
30.
HYDRAULIC FLUID FOAMS.
Step 1.
Perform hydraulic system test (see paragraph 14-1). Check for worn or damaged hydraulic pump or
loose fittings.
Repair or replace hydraulic pump assembly (see paragraph 14-3).
Tighten loose fittings.
Step 2.
Check hydraulic pump for worn or damaged pump shaft seal.
Replace pump shaft seal (see paragraph 14-3).
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