MAINTENANCE PROCEDURES
AB18EJ&18HJ Maintenance Manual 5-19 © Oct 2020
Figure 5-14
3. Loosen the clip at the end cap of air filter, and
remove the end cap.
4. Remove the air filter element.
5. Use a wet cloth to scrub the inside of filter housing
and end cap.
6. Inspect the filter element for contamination or
blockage. Replace the filter element if needed.
7. Install the filter element.
8. Install the end cap back to the filter and secure the
clip.
B-9 Inspect Angle Sensor and Travel
Switch
Regularly inspecting angle sensor and travel switch is
vital to safe machine operation. If the sensor and travel
switch can’t function properly, it will pose dangers to
machine operation.
Inspecting angle sensor
1. Turn the Ground/Platform select switch to ground
control position.
2. Pull out the emergency stop button on ground
controller to ON position.
3. Fully raise the boom through the secondary boom
up/down and main boom up/down switches.
4. Stop raising the secondary boom and main boom at
the max lift angle.
5. Lower the boom through the secondary boom up/
down and main boom up/down switches.
6. Stop lowering the secondary boom and main boom
once fully lowered.
Inspecting travel switch
1. Turn the Ground/Platform select switch to ground
control position.
2. Pull out the emergency stop button on ground
controller to ON position.
3. Move the the main boom telescope switch to extend
the boom.
4. The boom stops extending further when reaching
the limit.
5. Move the main boom telescope switch to retract the
boom.
6. The main boom can be fully retracted.
B-10 Inspect Engine Exhaust System
(AB18HJ only)
Inspecting engine exhaust system is vital to proper
engine operation and extending service life.
BURN HAZARD
Be cautious of the heated parts of
engine. Bodily contact with them may
result in severe burn.
NOTICE
Shut off the engine before inspection.
1. Inspect whether the engine exhaust pipe is
damaged or crushed flat.
2. Inspect whether the exhaust pipe is tightly
connected.
3. Inpsect whether the muffler shows signs of heating
fatigue or possiblity of interal malfunction.
4. Inspect the catalytic converter for blockage.
5. Tighten or replace parts, if needed, to ensure the
exhaust system is free of leakage.
B-11 Inspect Drive Reducer Oil Level
Inappropriate gear oil level of drive reducers will reduce
the machine performance, and continued use could
result in component damage.
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