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Early Models
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Operation & Maintenance Manual–38–
331/331E/334 Excavator
TAILGATE
Opening And Closing The Tailgate
AVOID INJURY
Never service or adjust the machine when the
engine is running unless instructed to do so
in the manual.
W–2012–0497
W–2020–1285
Keep the rear door closed when operating the
machine. Failure to do so could seriously
injure a bystander.
Release the latch (Item 1) [A] and pull the tailgate open.
Push firmly to close the tailgate.
The tailgate latch can be locked (Item 2) [A]. Use the
excavator key to unlock.
Adjusting The Bumper
The door bumper (Item 1) [B] can be adjusted for alignment
with the tailgate.
Close the tailgate before operating the excavator.
Adjusting The Tailgate Latch
The door catch (Item 1) [C] can be adjusted by loosening
the bolt and moving the cylinder the tighten the nut.
Close the tailgate before operating the excavator.
AIR CLEANER
See the SERVICE SCHEDULE Page 35 for the correct
service interval.
Daily Check
Check the condition indicator (Item 1) [D]. If the red ring
shows in the condition indicator, the filter element needs to
be replaced.
Replace the inner filter every third time the outer filter is
replaced or as indicated on Page 37.
Replacing The Filters
Outer Filter
Release the two fasteners (Item 2) [D].
Remove and clean the dust cup (Item 3) [D].
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Later Models
Early Models
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