TM 9-2320-285-10
3-4.
TROUBLESHOOTING TABLE (Continued)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
17. FIFTH WHEEL DOES NOT LIFT, LIFTS SLOWLY, OR HYDRAULIC PUMP NOISY (Continued)
Step 2. Check if bleed valve is fully closed (valve handle in vertical position).
a. If bleed valve is partly open, close it fully.
b. If bleed valve is fully closed, notify organizational maintenance.
18. FIFTH WHEEL WILL NOT LOWER OR LOWERS ONLY SLIGHTLY, THEN STOPS
Pull back 5th WHEEL lever and increase engine speed. Then push 5th WHEEL
lever forward to lower fifth wheel very slowly.
a. If fifth wheel lowers, fifth wheel had been lowered too quickly
(velocity fuses locked, stopping flow of oil from hydraulic
cylinders).
b. If fifth wheel does not lower, notify organizational maintenance.
3-23
