JLG X14JH Operator Manual - Manual (Page 88)

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6. CHECKING THE MACHINE AFTER REPAIRS
6.1 CHECKING THE PROPER WORKING OF THE CONTROLS
‑ Check that the ground, working platform and emergency controls are working smoothly
and easily and that the levers go back automatically to the central position.
‑ Check that the lever protections are not bent preventing a proper working of the control.
‑ See par.2.4 for a proper working of the controls.
6.2 CHECKING THE PROPER WORKING OF THE SAFETY DEVICES
Check that all the safety devices are working as per par.2.5 and 2.6.
BOOM LIFT MODELS X14JH
JLG
X14JHR0220311
PROBLEM CAUSE SOLUTION
After finishing work, it is
impossible to destabilise the
equipment • The overhead part has not
been put completely at rest or
the column switch has not
been properly positioned • Repeat the procedure of put‑
ting the overhead part at rest
and check the correct position
of the switch
When using the overhead
part, there are vibrations and
variability in the speed of the
withdrawing and re‑entering
manoeuvres of the working
arm • Telescopic arm and sliding
blocks insufficiently lubricated
• Worn sliding blocks
• Lubricate arm and sliding
blocks
• Replace sliding blocks
The working platform does
not remain levelled when
shifting the arm • Air in the levelling system
• The balancing valve on the
levelling system is faulty or
not calibrated
• Remove the air from the level‑
ling system of the working
platform (contact our technical
assistance service)
•Replace the balancing valve
of the levelling system of the
working platform