MULTIQUIP WM90SE Operation Manual page 34

ENGINE AIR CLEANER
1. Remove the air cleaner cover and foam filter element
as shown in Figure 39.
WING NUT
AIR CLEANER
COVER
FOAM FILTER
ELEMENT
GASKET
Figure 39. Engine Air Cleaner
2. To remove dirt, tap the paper filter element (Figure 39)
several times on a hard surface, or blow compressed
air not exceeding 30 psi (207 kPa, 2.1 kgf/cm²) through
the filter element from the air cleaner case side. NEVER
brush off dirt. Brushing will force dirt into the fibers.
Replace the paper filter element if it is excessively dirty.
3. Clean the foam element in warm, soapy water or
nonflammable solvent. Rinse and dry thoroughly. Dip
the element in clean engine oil and completely squeeze
out the excess oil from the element before installing.
DANGER
To avoid the risk of fire or an explosion, NEVER use
gasoline as a cleaning solvent.
PAGE 34 — WM90 SERIES PLASTER/MORTAR MIXERS • OPERATION MANUAL — REV. #2 (10/30/19)
BLOW COMPRESSED
AIR FROM THE
INSIDE OUT
PAPER FILTER
ELEMENT
MAINTENANCE (ENGINE)
SPARK ARRESTER CLEANING
Clean the spark arrester every 6 months or 100 hours of
operation.
1. Remove the three 4 mm screws securing the exhaust
deflector (Figure 40) to the muffler protector, then
remove the exhaust deflector.
4 MM
SCREW
EXHAUST
DEFLECTOR
MUFFLER
5 MM
SCREW
SPARK
ARRESTER
Figure 40. Spark Arrester
2. Remove the four 5 mm screws from the muffler
protector (Figure 40), then remove the muffler protector.
3. Carefully remove carbon deposits from the spark
arrester screen (Figure 41) with a wire brush.
SPARK ARRESTER
SCREEN
Figure 41. Cleaning the Spark Arrester
4. If the spark arrester has breaks or holes or is otherwise
damaged, replace it with a new one.
5. Reinstall the spark arrester and muffler protector in
reverse order of disassembly.
MUFFLER
PROTECTOR
5 MM
SCREW
WIRE BRUSH