TM 5-3805-262-342-16. HYDRAULIC SYSTEM TROUBLESHOOTING (CONT)MALFUNCTIONTEST OR INSPECTIONCORRECTIVE ACTION6. A HYDRAULIC CONTROL LEVER DOES NOT RETURN TO NEUTRAL (Cont).Step 4. (Cont).b.If hydraulic system oil is dark and thick,oil , contains air or particles of metal ornants from hydraulic system (page 3-754).has the odor of burntdirt, remove contami-7. HYDRAULIC OIL LEAKAGE AROUND CONTROL VALVE ASSEMBLY SPOOL(S).Remove control valve assembly spool which has leakage and replace spoolseals and O-rings (page 3-661, 3-672, or 3-682).8. LOAD FALLS WHEN A HYDRAULIC CONTROL LEVER OPERATED.Remove load check valve (page 3-694).Disassemble load check valve and check components for wear or damage (page3-695) .a. If load check valve components are worn or damaged, replace(page 3-696).b.If load check valve components are okay, remove circuit reliefvalve associated with defective circuit (page 3-697).Disassemble (page 3-697) and check parts for damage or wear(page 3-700). Replace defective parts as necessary (page 3-701).9. DETENT WILL NOT KEEP A HYDRAULIC CONTROL LEVER IN POSITION.Remove spool associated with control lever (page 3-661 or 3-672).Check coil for short or open circuit (page 3-667 or 3-677).a. Replace coil if shorted or open (page 3-668 or 3-679).b.If coil is okay, check spool and associated parts for wear ordamage (page 3-667 or 3-677).10. HYDRAULIC PUMP LEAKS OIL.Disassemble hydraulic pump (page 4-264).Check seals for damage (page 4-270).Replace seals (page 4-272).2-127
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