TM 10-3930-669-20 10.  HYDRAULIC MAST LIFT SPEED SLUGGISH (CONT). 2-484 KNOWN INFO Lift cylinder hose(s) OK. KNOWN INFO Lift control cable damaged or unadjusted. Hydraulic pump faulty. Stack valve faulty. TEST OPTIONS Visual inspection. REASON FOR QUESTION If  lift  control  cable  is  damaged or   unadjusted,   hydraulic   mast lift speed will be sluggish. ¬