Shindaiwa AHS2510 Manuel D'utilisation page 29

1. Guide bar
2. Locknut
3. Cutter blades
139-Hour or Annual Maintenance
1. Locknut
4. Shoulder bolt
5. Washer
2. adjustment screw
Maintenance and care
Cutter Blade adjustment
The cutter blades are very sharp. Always wear gloves
when working around the cutter assembly.
Failure to observe the precautions could cause an accident
or injury, or even lead to a fatality.
Cutting performance of your machine depends a great deal on
proper cutter blade adjustment. Properly adjusted blades will os-
cillate freely yet help prevent binding of cut material between
blades. Adjust blades as follows:
1. Loosen all blade locknuts at least one full turn.
2. Tighten each blade shoulder bolt firmly, and then loosen the
shoulder bolts 1/4 to 1/2 turn.
3. Working from the gearcase end, lock each bolt in place by
firmly tightening its locknut while preventing the shoulder
bolt from turning.
When shoulder bolt adjustment is correct, there should be a gap
of 0.25–0.50 mm between the cutter blades and the flat washers,
and the flat washer beneath each bolt head should turn freely.
Operating the trimmer with worn or improperly adjusted
cutters will reduce cutter performance and may also
damage your machine. Never operate the machine with
damaged or worn cutters.
Maintenance after first 139-hours, then every 150-hours
thereafter
Valve adjustment
Combustion chamber should be decarbonized, and the valve
clearance should be adjusted. It is highly recommended that
this is done by a Shindaiwa-trained service technician.
1. Remove engine cover, rocker arm cover, and set piston at
TDC-compression.
2. Loosen adjuster locknut so that the 2.5 mm Allen socked
head adjustment screw can turn freely.
Performing a valve adjustment incorrectly may cause hard
starting and/or can damage the unit. Refer to the C-4 Ser-
vice Manual for complete valve adjustment procedure and
torque specifications.
If you are unfamiliar with this engine or uncomfortable with
this procedure, consult with an authorized shindaiwa ser-
vicing dealer.
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WARNING
CAUTION
CAUTION