WM-70 PLASTER/MORTAR MIXER — OPERATION MANUAL — REV. #1 (08/09/04) — PAGE 29
Maintenance
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 23), 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.
DO NOT use gasoline as a cleaning solvent to avoid
creating the risk of fire or an explosion.
ENGINE OIL
1. Drain the engine oil when the oil is
warm
as shown in
Figure 24.
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 6. For engine oil capacity, see Table 2 (engine
specifications). DO NOT overfill.
4. Install drain bolt with sealing washer and tighten se-
curely.
Figure 24. Engine Oil (Draining)
Figure 23. Spark Plug Gap
WM-70 PLASTER/MORTAR MIXER — MAINTENANCE (ENGINE)ENGINE AIR CLEANER
1. Remove the air cleaner cover and foam filter element as
shown in Figure 25.
2. Tap the paper filter element (Figure 25) 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 nonflam-
mable 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 25. Engine Air Cleaner
DANGERDANGER
DANGERDANGER
DANGER
Explosive Hazard