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11
11.0 Points of Maintenance
11.6 Dry-type Air Filter
Read "Precautions for Filters and Elements"
Section 1.0 before servicing.
An air filter for the engine combustion air is
mounted as shown Item#2, Figure 11.6.2.
The degree of soiling of the air cleaner depends on the amount of dust contained in the
air. Consequently, the cleaning intervals
cannot be fixed generally, but have to be
determined from case to case.
Servicing the Air Cleaner
The air cleaner is due for servicing when the
entire red section Item#1, Figure 11.6.1, is
visible, in the
service indicator
with the engine
shut off. After
servicing the air
cleaner, reset
the signal by
pressing the reset button of the
service indicator.
The service
indicator is ready
Figure 11.6.1
to resume its
function.
1. Place toggle Power Switch Item#1, Figure
5.1.1 to Off position.
2. Remove the service cover of the air cleaner, Item#2, Figure 11.6.2 by unlatching
clips Item#3.
3. The primary-filter is fitted over the outlet
tube, creating a critical seal on the inside
diameter of the filter end-cap. Gently remove the primary-filter by moving the filter
back and forth to break the seal.
4. Remove the element from the filter housing.
NOTE: If the air cleaner is equipped with a
safety element, it only needs to be replaced
every three air cleaner services or every two
years whichever occurs first.
4. The safety-filter is fitted inside the outlet
tube, creating a critical seal on the outside
diameter of the filter end-cap. Gently remove the safety-filter by moving the filter
back and forth to break the seal.
5. Remove the element from the filter housing.
6. Wipe the sealing surfaces of the outlet tube
with a clean cloth. Be careful not to leave
any dirt which could prevent a good seal or
be ingested into the engine.
7. Inspect the old filters for any signs of damage. A streak of dust on the inside surface
of the filter is a indication of damage. Remove any cause of leaks before installing
new filters.
8. Inspect the new filters before installing and
make sure they are not damaged.
9. Carefully insert the safety filter into the filter
housing making certain it is completely
seated into the housing.
10. Carefully insert the primary filter into the
filter housing, over the safety filter. Seat the
filter by hand making certain it is completely seated into the housing before latching
the cover in place. If the cover hits the primary filter before it is fully in place, remove
the cover and push the filter further into the
housing. The cover should go on with no
extra force.
11. Secure lid with snap clips Item#3.
3
2
Figure 11.6.2
Cleaning the Dust Discharge Valve
 Empty the dust discharge valve by
pressing together
the discharge slot,
applying pressure
as indicated by the
arrows (Figure
11.6.3).
 Clean the discharge
slot.
Figure 11.6.3
© 2013 Stadco Products Division, Ephrata, PA 17522 USA
CD20/30/40 Operators Manual 13067 Rev 02 121514
Page 36