TM 9-2330-390-14&PTable 4-2. Unit Troubleshooting (Con't).MALFUNCTIONTEST OR INSPECTIONCORRECTIVE ACTION15. LIFT CYLINDER(S) WILL NOT OPERATE.Step 1.Check hydraulic control valve for damage. Check for proper operation of levers (seeparagraph 2-21).Replace damaged hydraulic control valve (see paragraph 4-108).Step 2.Check for leaking or damaged lift cylinder.Replace damaged lift cylinder (see paragraph 4-110).16. POSITIONING CYLINDER(S) WILL NOT OPERATE.Step 1.Check hydraulic control valve for damage. Check for proper operation of lever (seeparagraph 2-21).Replace damaged hydraulic control valve (see paragraph 4-108).Step 2.Check for leaking or damaged positioning cylinder.Replace damaged positioning cylinder (see paragraph 4-83).17. LIFT CYLINDER DRIFTS.Check hydraulic control valve for proper operation of levers (see paragraph 2-21). Ensure that lever(s) returnto center position.Replace damaged hydraulic control valve (see paragraph 4-108).Replace damaged check valve (see paragraph 4-110).4-39
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