Shindaiwa HT2510 Manuel D'utilisation page 14

Blades
Guide Bar
Cutters
Spacer
Socket Head
Shoulder Bolt
Figure 32
139-Hour or Annual Maintenance
Maintenance after first 139-hours,
then every 150-hours thereafter.
 Combustion chamber should be decar-
bonized, and the valve clearance should
be adjusted. It is highly recommended
that this is done by a Shindaiwa-trained
service technician.
 Replace the spark plug annually: Use
only NGK CMR5H or equivalent resis-
tor type spark plug of the correct heat
range. Set spark plug electrode gap to
0.6 -0.7 mm.
NOTE:
The NGK CMR5H also meets the require-
ments for electro magnetic compliance
(EMC).
CAUTION!
 Performing a valve adjustment
incorrectly may cause hard starting
and/or can damage the unit. Refer to
the C4 Service Manual for complete
valve adjustment procedure and
torque specifications.
 If you are unfamiliar with this engine
or uncomfortable with this proce-
dure, Consult with an authorized
Shindaiwa servicing dealer.
14
Standard blades require no periodic adjust-
Locknut
ments. Make sure all blade shoulder bolts
are tight and in good condition.
 Clean blades and apply a light coating of
oil to all metal surfaces. Vegetable oils
may be used to protect sensitive plants
from spotting.
HT2510_20
Plate
Valve Adjustment
1. Remove cylinder cover, rocker arm cover,
and set piston at TDC-compression.
Figure 33
2. Loosen adjuster locknut so that the
2.5 mm Allen socket head adjustment
screw can turn freely.
Figure 34
3. Insert feeler gauge .004 (0.10 mm) for
both intake and exhaust; between valve
stem tip and rocker arm.
4. Turn adjustment screw (clockwise =
tighter, counter-clockwise = looser) until
feeler gauge is almost snug. Back off
just enough to allow gauge to slip out
with limited resistance.
5. While holding adjustment screw in place
with Allen driver, tighten locknut with
wrench.
6. Turn engine over several times, and
return to TDC-compression. Recheck
with proper feeler gauge to make sure
clearance adjustment did not change as
a result of tightening locknut. Readjust
as necessary.
Figure 35
7. Replace rocker arm cover gasket to as-
sure proper sealing and install cover.
IMPORTANT!
If new gasket is not available and/or old
gasket is not damaged, old gasket may be
reused. Never use cracked or damaged
gaskets!