© Apr 2022 5-22 TB18 Plus&20J Plus Maintenance Manual
MAINTENANCE PROCEDURES
Figure 5-25 WEICHAI WP3.2 air filter
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 Length and Angle Sensors
Regularly inspecting length and angle sensors is vital to
safe machine operation. If the sensors can’t function
properly, it will pose dangers to machine operation.
Inspecting length sensor
0kg≤platform capacity≤300kg（661 lb）-TB20J
Plus only
1. Turn the Ground/Platform select switch at
ground controls to the Ground.
2. Pull out the emergency stop button at the
ground controls to ON position.
3. Turn the key switch at ground controls to ON
position.
4. Using the main boom lift and jib up/down
function, adjust the main boom and jib boom to
horizontal.
5. Using the main boom telescope function, extend
the main boom.
6. TB20J Plus：when the boom extends to the
farthest(the ground display reads 16.1m of
boom length), the buzzers at the ground and
platform controls should be sounding, boom
further extending and boom up/down should be
restricted, but boom retracting and turntable
rotating should be allowed.
7. Using the main boom telescope switch, retract
the boom.
8. The boom can be fully retracted.
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