13
23138
10/15-Hour Maintenance
CAUTION!
Before removing the spark plug, clean
the area around the plug to prevent dirt
and dust from getting into the engine’s
internal parts.
Every 10 to 15 hours of operation:
n
Remove and clean the spark plug. See
Figure 18. Adjust the spark plug elec-
trode gap to 0.04-inch (0.6 mm). If the
plug must be replaced, use only:
–Champion CJ8 or equivalent.
AH231_31
AH231_32
Figure 18
Clean the spark
plug and check the
gap at the electrode.
0.024 inch
(0.6 mm)
n
Lubricate the cutter assembly gear-
box by pumping one or two strokes
of lithium-base grease into the grease
fitting using a lever-type grease gun.
See Figure 19.
CAUTION!
Overlubricating can cause the gearbox
to operate sluggishly and can cause
grease to leak out.
Figure 19
Gearbox
Grease Fitting
AH231_34
50-Hour Maintenance
Every 50 hours of operation
(more frequently in dusty or
dirty conditions):
n
Remove and clean the cylinder cover
and clean dirt and debris from the
cylinder cooling fins.
n
Lubricate the gearcase
. To per-
form this operation, first remove the
gearcase from the outer tube as follows
(Figure 0.):
Servicing the fuel filter
CAUTION!
Make sure you do not pierce the fuel
line with the end of the hooked wire.
The line is delicate and can be dam-
aged easily.
n
Use a wire hook to extract the fuel filter
from inside the fuel tank (Figure ). In-
spect the fuel filter element. If it shows
signs of contamination from debris,
replace it with a genuine Shindaiwa
replacement fuel filter element. Before
reinstalling the filter, inspect the fuel
line. If you discover damage or deterio-
ration, the unit should be removed from
service until it can be inspected by a
Shindaiwa-trained service technician.
Filter
Element
Hooked
Wire
Figure 22
Figure 20
Outer Tube
Gearcase
CAUTION!
Do not remove the D-shaped shim
washer from the gearcase clamp! The
shim washer prevents damage from
overtightening the tube clamp screw.
a. Loosen the gearcase clamp bolt.
b. Remove the index bolt from the
gearcase.
c. Slide the gearcase out of the tube.
Using a grease gun, pump lithium-
base grease (about 10 grams) into the
grease fitting on the gearcase until you
see old grease being purged from the
gearcase (Figure 0). Purged grease
will be visible in the outer tube cavity.
Clean up excess grease, then reassem-
ble the gearcase onto the outer tube.
Make sure the index bolt fits into the
hole on the outer tube. Securely tighten
both bolts.
Gearcase
Clamp Bolt
Index Bolt
Figure 21
Gearcase
Grease Fitting
Summary of Contents for AHS231/EVC
Page 19: ...19 Notes...
