50 hour maintenance, Hour maintenance – Shindaiwa 80974 User Manual

Page 14

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MAINTENANCE

50 hour Maintenance

Every 50 hours of operation

(more frequently in dusty or dirty condi-

tions):
n

Remove and clean the cylinder cover

and clean grass and dirt from the cylin-

der fins.

n

Remove the cutting attachment, cutting

attachment holder and gear shaft col-

lar. Remove the filler plug from the side

of the gearcase and press new grease

into the gearcase until the old grease

is pushed out. Use only lithium-base

grease such as Shindaiwa Gear Case

Lubricant or equivalent. See Figure 29.

New Grease

Old

Grease

Gear Shaft Collar

Figure 29

Use a hooked wire to extract the fuel

filter from inside the fuel tank. See Fig-

ure 30. Remove and replace the filter

element. Before reinstalling the filter,

inspect the condition of the fuel line.

If damage or deterioration are noted,

the unit should be removed from

service until it can be inspected by a

Shindaiwa-trained service technician.

Hooked

Wire

Figure 30

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.

Forward

Muffler

Shield

Lower Muffler

Screw

Muffler

5 mm Muffler

Screws

Rear Muffler

Shield

Spark Ar-

rester Screen

Rear Muffler

Shield Screw

Figure 31

135-hour Maintenance

WARNING!

Never operate this unit with a dam-
aged or missing muffler or spark
arrester! Operating with missing or
damaged exhaust components is a
fire hazard and could also damage
your hearing.

1. Remove the spark plug boot.
2. Remove the four 4 mm engine cover

screws (two in the back and two in the

front of the cover) and lift the cover

from the engine.

3. Remove the two 5 mm muffler screws.

Remove the lower muffler screw, then

lift the muffler assembly from the

engine.

4. Seperate the muffler from the forward

muffler shield, while observing the

orientation of the components.

See Figure 31.

5. Remove the spark arrester screen and

clean with a stiff bristle brush.

6. Gently tap the muffler on a wood sur-

face to dislodge any loose carbon.

7. Inspect the cylinder exhaust port for

carbon buildup.

IMPORTANT!

If you note excessive carbon buildup,
consult with an authorized servicing
dealer.

8. Reassemble the muffler in the reverse

order of disassembly.

14

Every 135 hours of operation, re-

move and clean the muffler.

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