TM 10-3930-669-20 9.  LIFT CYLINDER(S) WILL NOT HOLD LOAD (DOWNDRIFT) (CONT). KNOWN INFO TEST OPTIONS Lift cylinder hose(s) OK. Visual inspection. POSSIBLE PROBLEMS REASON FOR QUESTION Lift cylinder(s) faulty. Lift control cable damaged or unadjusted. Stack valve faulty. Hydraulic reservoir return hose leaking or damaged. If    lift    cylinder(s)    is    faulty,    lift cylinder will not hold load. KNOWN INFO TEST OPTIONS Lift cylinder hose(s) OK. Lift cylinder(s) OK. Visual inspection. POSSIBLE PROBLEMS REASON FOR QUESTION Lift control cable damaged or unadjusted. Stack valve faulty. Hydraulic reservoir return hoses leaking or damaged. If lift control cable is damaged or unadjusted, lift cylinder(s) will not hold load. ¬ ¬ 2-476