D4OPTRS 24 2019
AIR CLEANER MAINTENANCE
Proper air cleaner servicing will result in maximum engine protection against the ravages of
dust. Proper servicing will save you time and money by maximizing fi lter life and cleaning
effi ciency. The most common problem with air cleaner service is over servicing. Air fi lter
elements increase in dust cleaning effi ciency as the dust builds up in the media and they
become seasoned. DO NOT BE FOOLED by air fi lter appearance; it should look dirty. The
sweeper’s engine air fi lter has a very effi cient precleaner and high dirt holding capacity
for long life. Service the fi lter based on restriction indicator. The sweeper is equipped with
an restriction indicator to warn the operator when the air inlet restriction reaches 25” w.c.
The indicator may be on the air cleaner or on the control console depending on options
ordered. The air cleaner element should be inspected and serviced when indicated. Failure
to service the air cleaner element when indicated may reduce fuel economy, reduced engine
performance, and risk damage to the engine.
The air cleaner utilizes a precleaner to remove much of the dust before it reaches to element.
This precleaner also spins out incidental water in the air stream. Avoid spraying water directly
into the air cleaner inlet.
Follow these steps to properly service the air cleaner element.
1. Shut off engine. Unlatch and remove the housing service cover.
2. Remove primary fi lter. Pull the fi lter out of housing. Using the handle, push down on the
fi lter to loosen the seal, which will tilt the fi lter to approximately a 5º angle.
3. Clean the inside of the air cleaner housing with a damp cloth.
4. Remove safety fi lter. Using the plastic handle on the face of the safety fi lter, pull the
fi lter toward the center of the housing and remove. Note: A safety fi lter only needs to be
replaced at every third primary air fi lter change.
5. Inspect the new fi lter before installing. Visually check for cuts, tears, or indentations on
the sealing surfaces before installation. If any damage is visible, do not install. Using the
plastic handle on the safety fi lter, slide the fi lter at an angle into the outlet side and push
in place until the fi lter seats fi rmly and evenly within the housing. Insert the safety fi lter
tab into the positioning slot before pushing the fi lter in place.
6. Insert the primary fi lter. Slide the fi lter down at approximately a 5º angle until it hits the
end of the housing. Rotate the fi lter toward the outlet section to complete the seal.
7. Replace the service cover. Place the service cover in position and fasten the latches.
Note: If the cover doesn’t seat, remove and re-check the fi lter position. The cover will be
diffi cult to install if the fi lter isn’t installed correctly.
8. Visually inspect your inlet and outlet connections. Inspect the vacuator valve. Replace if
any signs of wear or damage are visible.
REPLACEMENT VACUATOR™ VALVES
The Vacuator Valve, standard on the majority of Donaldson air cleaners, is an important part
of the functionality of the air cleaner. It is an integral part of the pre-cleaning stage on 2-stage
air cleaners.
The dust cup, where pre-cleaned dust is collected, is normally under a slight vacuum when
the engine is running. The normal engine pulsing of the vacuum causes the Vacuator Valve
(located at the lowest point on the dust cup) to open and close. This action automatically
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