TM 9-2330-381-14
5-7.
TROUBLESHOOTING (CONT)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
HYDRAULIC SYSTEM - CONT
WARNING
Be sure all four support legs are down and supporting the platform prior to
checking the gooseneck isolation valve handles for proper operation or injury to
personnel may result.
Step 2.
Check gooseneck drift, while in ADJUST mode, by observing front suspension.
If gooseneck drifts and front suspension does not, check gooseneck cylinder for internal leakage as
follows: couple tractor/semitrailer (para. 2-24), operate gooseneck isolation valve handle to RUN
position (para. 2-6), close hydraulic tank shut-off valve, remove lower hose from each gooseneck
cylinder and cap lines to prevent fluid loss, check cylinder port for fluid loss while watching for
platform drift down, remove cap from line, reconnect hoses to cylinder, open hydraulic tank shut-off
valve. If platform drifted and fluid loss from cylinder port was approximately the same rate, cylinder(s)
are leaking internally. Repair gooseneck cylinder(s) (para. 5-26).
5-6 Change 1
