TM  10-3930-638-24&P 3-29.   HYDRAULIC   LIFT   SYSTEM   TROUBLESHOOTING   (cont) MALFUNCTION TEST  OR  INSPECTION CORRECTIVE ACTION 4.  SIDESHIFT  CYLINDER  ASSEMBLY  OPERATION  SLUGGISH  (cont) Step 2. Start engine and operate at idle speed. Place SHIFT control lever in LEFT position until forks are in extreme left position. Turn  engine  off  and  operate  control  levers  several  times  to  relieve  hydraulic  pressure. Disconnect and cap hose fitting connected to rod end of sideshift cylinder assembly. CAUTION Don’t place SHIFT control lever in RIGHT position in following steps; hydraulic oil will flow out of disconnected hose fitting. Start engine and operate at idle speed. Place SHIFT control lever in LEFT position and hold while an assistant checks for hydraulic oil leakage  at  side  shift  cylinder  assembly  port  from  which  fitting  was  disconnected. a. Remove sideshift cylinder assembly and repair piston assembly (para 3-30c) if hydraulic oil leakage is observed. b. If hydraulic oil leakage is not observed at side shift cylinder assembly port, remove and repair  control  valve  (para  3-30a). 5. UNABLE TO TILT LOAD (ALL OTHER FUNCTIONS NORMAL) NOTE After completion of each check, turn engine off. Step  1. Check  tilt  cylinder  assemblies  for  hydraulic  oil  leakage. a. If hydraulic oil leakage at tilt cylinder assemblies is observed, remove and repair it (para 3-30b). b. If hydraulic oil leakage is not observed at tilt cylinder assemblies, proceed to step 2. Step 2. Check hose assemblies between tilt cylinder assemblies and control valve for hydraulic oil leakage. a. If hydraulic oil leakage is observed at hose assemblies, replace leaking hose assemblies (para 2-56f). b. If hydraulic oil leakage is not observed, proceed to step 3. Step  3.  Check  control  valve  for  hydraulic  oil  leakage. a. [f hydraulic oil leakage is observed at control valve, remove and repair it (para 3-30a). b. If hydraulic oil leakage is not observed, proceed to step 4. 3-199