© Oct 2020 5-24 AB18EJ&18HJ Maintenance Manual
MAINTENANCE PROCEDURES
NOTICE
Be sure to test the oscillate system quarterly, or after
replacing any system component, or when any
system malfuction is discovered.
1. Place a 120mm (4.7 in)wooden block with bevel
side in front of the front left wheel of the machine.
2. Extend the boom by at least 1.2m to place the
machine in operating position.
3. Drive the machine to rest the front left wheel on the
wooden block.
4. Slowly rotate the turntable to the right by 90
degrees.
5. The rear detection indicator light will illuminates,
move the function switches to keep the boom
horizontal and fully extended.
6. Inspect the oscillate cylinder, ensure the oscillate
cylinder on the side with load applied is without any
evidence of retracting, and then retract the boom.
7. Move the reverse drive switch to drive the machine
off the wooden block.
8. The assistant on the ground should inspect whether
the wheel on the front left or rear right still remains
off the ground, and keep it elevated.
9. Slowly rotate the turntable to allow the turntable
back to the center position (at the center between
the two drive wheels)
10. Drive the machine forward or reverse, the float
cylinder on the front left wheel should be released
to lower the wheel to come in close contact with the
ground.
11. Perform the same procedure to test the oscillate
cylinder on the front right side.
12. If the oscillate cylinder malfunctions, the malfuction
must be cleared by qualified service technician
before proceeding to next step.
B-18 Inspect Electrical Wiring
Maintaining electrical wiring in good condition is vital to
safe operation and good machine performance.
Continued use of the machine with damaged electrical
wiring or in corrosive environment will cause severe
injury. Before operating the machine, be sure to replace
or repair the damaged or corroded electrical wires.
ELECTROCUTION HAZARD
Before inspecting the electrical
wires, be sure to disconnect the
battery and the charger on the AC
outlet. Contact with hot or live
circuits could result in death or
serious injury.
1. Inspect the following areas for damage or
corrosion：
• Engine wiring harness (AB18HJ only)
• Turntable manifold wiring harness
• Junction box at ground controller
• Junction box at platform controller
• Cable track system wiring harness
2. Inspect the flexile joints, and confirm that the joints
are tight and the sensor lines are not damaged.
B-19 Inspect the Battery
Good battery condition is important for the proper and
safe operation of the equipment. The equipment
components may be damaged and it might lead to
hazardous conditions if the electrolyte level is
inappropriate and the battery cable is damaged or is
not connected firmly.
ELECTRICAL SHOCK HAZARD
Touching battery charger conductor
might lead to death or serious
injuries. Remove all earrings,
wristwatches and other jewelry.
BODILY INJURY HAZARD
Lead-acid batteries and lead-acid
maintenance-free batteries contain
acid. Avoid acid overflow or contact
with acid in lead-acid batteries and
lead-acid maintenance-free batteries.
If battery acid spills, use water mixed
with bicarbonate (baking soda) to
neutralize the acid.
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