TM 10-3930-641-34-1
SYMPTOMS INDEX (CONT)
(Sheet 2 of 4)
Troubleshooting
Procedure
Page
HYDRAULIC SYSTEM
Cargo tophandler does not lock .......................................................................................................................................................................... 2-35
Carriage won't lower correctly ............................................................................................................................................................................. 2-28
Control valve
Load lowers when lift lever is moved from NEUTRAL to RAISE position .............................................................................................. 2-33
Relief valve doesn't open at high pressure............................................................................................................................................. 2-35
Won't hold load....................................................................................................................................................................................... 2-33
Seals leak ............................................................................................................................................................................................... 2-33
Spools don't move easily........................................................................................................................................................................ 2-32
Spools don't return to neutral ................................................................................................................................................................. 2-34
Hydraulic system won't move or is "bouncy" ....................................................................................................................................................... 2-34
Lift or tilt cylinders won't hold (hydraulic system will not hold load)..................................................................................................................... 2-30
Mast tilts or lifts too slowly ................................................................................................................................................................................... 2-29
Oil temperature too high ...................................................................................................................................................................................... 2-31
Oil leaks inside cylinder ....................................................................................................................................................................................... 2-35
Pump doesn't work .............................................................................................................................................................................................. 2-30
Pump noisy.......................................................................................................................................................................................................... 2-31
Scratches on cylinder rods .................................................................................................................................................................................. 2-35
Tilt cylinder piston rods show wear...................................................................................................................................................................... 2-35
Won't lift load ....................................................................................................................................................................................................... 2-28
Hydraulic system "tee" tests
Overheats ............................................................................................................................................................................................................ 2-41
Relief valve tap shows high pressure .................................................................................................................................................................. 2-41
Go on to Sheet 3
2-5