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Page Title:
Table 6. Fifth Wheel Hydraulic System Troubleshooting Procedures. |
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 TM 9-2320-312-24-1
TROUBLESHOOTING PROCEDURES - CONTINUED
0006 00
Table 6. Fifth Wheel Hydraulic System Troubleshooting Procedures.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
a. Tighten or replace leaking
1. Fifth Wheel Drifts Down/Will Not Support
Inspect hydraulic system hoses
or damaged hoses or
Load.
and fittings for signs of leaking
fittings (WP 00127 00).
hydraulic fluid.
b. Replace locking valve
2. Fifth Wheel Lowers Slowly.
1. Check for dirty or clogged
Remove and clean dirty or
hydraulic reservoir fill cap.
clogged fill cap (WP 0130 00).
2. Check for clogged hydraulic
Replace hydraulic filter element
system return filter element.
3. Fifth Wheel Moves Up/Down When Engine Is
Check fifth wheel lift control
Started.
handle for any of the following
conditions:
a. Handle will not return to
1. Replace fifth wheel lift
center position.
control handle if handle will
not center (WP 0030 00).
2. Adjust and/or replace fifth
wheel lift control cable (WP
1. Replace lift control handle
b. Handle is frozen in place.
Disconnect lift control
handle from flow control
valve.
Determine
if
handle or cable has failed
2. Replace cable (WP 0030 00).
3. Replace failed flow control
valve (WP 0128 00).
4. Notify DS Maintenance to
troubleshoot the PTO.
Tighten or replace leaking or
4. Fifth Wheel Will Not Lift or Lower.
1. Inspect hydraulic system
hoses and fittings for signs of
damaged hoses or fittings (WP
leaking hydraulic fluid.
2. Check hydraulic fluid level in
Add hydraulic fluid as necessary
reservoir.
Replace leaking valves (WP
3. Inspect hydraulic system flow
control valve and locking
valve for signs of leaking
hydraulic fluid.
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