JLG X17J Plus Operator Manual - Manual (Page 158)

BOOM LIFT MODELS X17JPLUS
JLG
154 X17JPR0020413
10. TROUBLESHOOTING
FAULT CAUSE SOLUTION
The pump is very noisy. • No pump intake
• Pump excessively worn
• Pump takes in air • Replace pump
• Check oil level in the tank
On activating the pump no
oil is delivered to the
hydraulic system or it is not
sufficiently pressurised to
move the machine • See point 1
• Maximum pressure valves
not set or dirty
• Maximum pressure valve
seals worn
• No correspondence
between remote control inser‑
tion point and position of key
for selecting the control posi‑
tion • See point 1
• Set or clean maximum pres‑
sure valves
• Replace maximum pressure
valves
• Check key position
• Replace fuses
Once machine has been sta‑
bilised, the aerial part cannot
be removed from the sup‑
ports in the rest position • See point 2
• Contacts on the stabiliser
microswitches don’t close
• Machine not level within
the tolerance of 1°.
• Emergency stop in the
basket not correctly in place • See point 2
• Adjust microswitches on
stabilisers
• Level machine within the
tolerance of 1°.
• Check emergency stop con‑
tact key in the basket
• Dismantle and clean stop
valves on rams that won’t
support the load
The machine upper structure
cannot support the work
platform with the rated load
on board • Dirty or faulty stop valve • Reset emergency button
that was pressed
When operating the aerial
part the machine stops and
won’t move •Emergency button acciden‑
tally pressed
•Load cell activated
•One stabiliser lost contact
with ground • Restore the neutral position
of the pressed emergency
button
• Unload machine
• Follow emergency procedu‑
re