POWER SYSTEM
TB20J Plus Maintenance Manual 89
© Feb. 2023
Radial sealing air filter
Fig 49 Radial sealing air filter
1. Air filter back cover
2. Safety filter element
3. Main filter element
4. Air filter service indicator
5. Air filter housing
6. Air director
NOTICE
Pay attention to protect the inside the filter element
during maintenance to avoid impurities entering the
filter element during maintenance.
1. Check the air filter service indicator, and maintain
the air filter when the indicator becomes red.
2. Open the air filter back cover clip, remove the back
cover, shake the main filter element up and down,
and remove the main filter element horizontally.
3. Check whether there is dust in the old filter element
and on the surface of the safety filter element. If
there is dust, the filter layer must be broken, and the
filter element must be replaced.
4. Blow the outer element with 0.5MPa (72.5psi) clean
air from the inside to the outside. Do not move the
safety filter element during maintenance. If cleaning
is not possible, it is recommended to replace the fil-
ter element.
5. Check if the air director inside the housing is prop-
erly installed: push the air director to the bottom of
the housing, and turn the air director to ensure it is
properly installed.
6. Reinstall the cleaned outer filter element into the air
filter and press the filter element inward.
7. Reinstall the back cover of the air filter, check
whether the sealing ring in the bottom cover has
come off or damaged. When installing the back cov-
er, the dust exhaust valve should be positioned ver-
tically downward, push the back cover to contact
with the housing, and clamp the back cover and the
housing with a clamping jaw.
NOTICE
Check whether the dust exhaust valve of the back
cover is blocked, deformed or cracked to ensure
that the dust exhaust valve is working normally.
8. After the maintenance is completed, press the reset
button on the service indicator to return to the green
state.
NOTICE
• When cleaning the main filter element, the safety
filter element should not be cleaned and should be
installed on the machine at all times. The safety fil-
ter element should only be replaced when the
main filter element is replaced.
• It is forbidden to blow the outer filter element from
the outside to the inside. If there is lots of dust on
the outer surface of the filter element, remove the
dust by hand patting. The inner filter element
(safety filter element) must not be disassembled
and cleaned, and must be replaced together with
the outer filter element.
• If the service indicator still gives an alarm after
cleaning the safety filter element, try to change the
main filter element and the safety filter element.
93 dust filter
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