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WM63-SERIES MIXER • OPERATION AND PARTS MANUAL — REV. #0 (069/27/12) — PAGE 27
MAINTENANCE (ENGINE)
Perform the scheduled maintenance procedures as defined
by Table 8 and below:
DAILY
Thoroughly remove dirt and oil from the engine and
control area. Clean or replace the air cleaner elements
as necessary. Check and retighten all fasteners as
necessary. Check the gearbox for oil leaks. Repair or
replace as needed.
WEEKLY
Remove the fuel filter cap and clean the inside of the
fuel tank.
Remove or clean the filter at the bottom of the tank.
Remove and clean the spark plug (Figure 26), then adjust
the spark gap to 0.024 ~0.028 inch (0.6~0.7 mm). This
unit has electronic ignition, which requires no adjustments.
Figure 26. Spark Plug Gap
ENGINE OIL
1. Drain the engine oil when the oil is warm as shown in
Figure 27.
2. Remove the oil drain bolt and sealing washer and allow
the oil to drain into a suitable container.
3. Replace engine oil with recommended type oil as listed
in Table 5. For engine oil capacity, see Table 2 (Engine
Specifications). DO NOT overfill.
4. Install drain bolt with sealing washer and tighten
securely.
0.024-0.028 IN.
(0.6-0.7 MM.)
GAP
Figure 27. Engine Oil (Draining)
ENGINE AIR CLEANER
1. Remove the air cleaner cover and foam filter element
as shown in Figure 28.
2. Tap the paper filter element (Figure 28) several times
on a hard surface to remove dirt, 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 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.
Figure 28. Engine Air Cleaner
OIL FILLER CAP
DIPSTICK
DRAIN
BOLT
SEALING
WASHER
DANGER
DO NOT use gasoline as a cleaning solvent to avoid
creating the risk of fire or an explosion.