Bobcat 331 - Air Cleaner Service (Cont’d)

A
P–21149
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D
P–19203
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3
2
1
P–30530
Later Models
Early Models
Operation & Maintenance Manual–39–
331/331E/334 Excavator
AIR CLEANER SERVICE (Cont’d)
Outer Filter (Cont’d)
Pull the outer filter from the air cleaner housing [A].
Check the housing for damage.
Clean the housing and the seal surface. Do Not use
compressed air.
Install a new element.
Install the dust cup (Item 1) [B] and engage the fasteners
(Item 2) [B].
Check the air intake hose and the air cleaner housing for
damage. Make sure all connections are tight.
Inner Filter
Only replace the inner filter element under the following
conditions:
• Replace the inner filter element every third time the
outer filter is replaced.
• After the outer element has been replaced, press the
button (Item 3) [B] on the top of the condition indicator
and start the engine. Run at full RPM, then reduce
engine speed and stop the engine. If the red ring shows
in the condition indicator, replace the inner filter element.
Remove the dust cup, outer filter and inner filter.
NOTE: Make sure all sealing surfaces are free of dirt
and debris.
Install the new inner element [C].
Install the outer element and the dust cup [B].
Press the button on the condition indicator (Item 3) [B] to
remove the red ring.
HEATER AIR FILTERS (With Cab Option Only)
The heater filter(s) must be cleaned regularly. The filter(s)
are located at the left of the operator seat [D].
Fresh Air Filter
Remove the cover (Item 1) [D].
Remove the filter (Item 2) [D]. Use low air pressure to clean
the filter; or replace when very dirty.
Install the filter and the cover.
Recirculation Filter (Early Models Only)
Remove the cover (Item 1) [D].
Remove the filter (Item 3) [D] and wash the filter with a mild
detergent and water.
Install the filter (after dry) and the cover.
B
P–21163
2
1
3
C
P–21150