Engine System
16
Service Manual – PBU Propane Floor Burnisher
Intake Air Filter
The engine air intake has a 2-stage air filter: A washable pre-filter and a disposable main filter. The main
filter prevents fine dust from entering the engine, and the pre-filter increases the life of the main filter by
keeping coarse debris from clogging the filter.
1
Rotate the two knobs on the filter cover 1/4-turn
counterclockwise, and remove the cover
2
Loosen the upper clamp and remove the filter
from the plenum, or optionally, loosen the lower
clamp and lift the filter and air plenum up off the
carburetor. You may find this easier than trying
to remove the filter from the plenum.
3
Slide the foam pre-filter off the main filter. The
pre-filter may be washed with mild soap (dish
soap) and water
4
Thoroughly dry the pre-filter.
•
Do not wring the filter, as this can tear the foam.
•
Do not install the pre-filter over the main filter unless
it is completely dry. Moisture from the pre-filter can
damage the paper of the main filter.
•
Replace the pre-filter if it becomes torn or damaged.
5
If the main filter is relatively clean, it can be vacuumed
off and replaced (do not use compressed air) However, if
the filter media appears darkened, it should be replaced.
6
Make sure the pre-filter is completely dry, and reinstall
it over the main filter.
7
Reinstall the main filter assembly onto the engine.
Filter
Cover
Engine
Filter
Upper
Clamp
Lower
Clamp
Air
Plenum
Main
Filter
Pre-Filter
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