Cutter Blade Adjustment - Shindaiwa X7502863700 Owner's/Operator's Manual

Maintenance (continued)

Cutter blade adjustment

WARNING!
The cutter blades are very
sharp! Always wear gloves when
working around the cutter assembly.
Cutting performance of your machine
depends a great deal on proper cutter
blade adjustment. Properly adjusted
blades will oscillate freely yet help pre-
vent 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.
135 - hour maintenance
WARNING!
Never operate the unit with
a damage or missing muffler or spark
arrester! Operating with a missing
or damaged spark arrester is a fire
hazard and could also damage your
hearing.
If the engine becomes sluggish and
low on power, check and clean the
spark arrester screen.
1. Loosen the knob of the spark plug
cover and remove the cover.
2. Remove the spark plug lead from
the spark plug.
3. Loosen the four 5 mm bolts located
at the top of the recoil starter hous-
ing and remove the cover.
4. Loosen the 5 mm bolt located at
the top of the cylinder cover and
two 4 mm bolts located at the
bottom of the cylinder cover and
remove cover.
5. Loosen three 5 mm muffler cover
bolts and remove the muffler cover.
6. Remove muffler gasket bolt.
7. Loosen two 4 mm screws from the
muffler cover.
8. Remove two 4 mm screws from the
top tail plate and remove tail plate.
14
CAUTION!
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.
3. Working from the gearcase end,
lock each bolt in place by firmly
tightening its locknut while prevent-
ing the shoulder bolt from turning.
When shoulder bolt adjustment is cor-
rect, 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.
Gasket
plate
Spark arrester screen
Lower tail plate
Muffler
gasket
Gaskets
Muffler gasket bolt
9. Remove the spark arrester screen
and clean with a stiff bristle brush.
10. Remove the muffler from the
engine and inspect the cylinder
exhaust port for carbon buildup.
Guide Bar
Cutter
Blades
Adjusting cutter blades
Muffler plate screws
Plate
Muffler
11. Reassemble the muffler in the
reverse order of disassembly
If you note excessive carbon buildup,
consult your servicing dealer.
Locknut
Washer
(should turn
Shoulder Bolt
freely)
Top tail plate
Muffler cover
screws
Muffler
cover bolts
Muffler
cover
IMPORTANT!