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A
4B_WARNING: Disconnect the spark
plug before performing maintenance,
service, or adjustments, except for car-
buretor adjustments
CHAIN SHARPENING
Chain sharpening requires special
tools. You can purchase sharpening
tools at Sears or go to a professional
chain sharpener.
CHAIN REPLACEMENT
WARNING: Wear protective
gloves when handling chain. The
chain is sharp and can cut you even
when it is not moving.
It is normal for a new chain to stretch
during the first 15 minutes of operation.
You should recheck your chain tension
frequently and adjust the chain tension
as required. See CHAIN TENSION sec-
tion.
Replace the old chain when it be-
comes worn or damaged. Use only
the Low Kickback replacement chain
specified in the repair parts list. The
correct replacement bar and chain is
also specified on a decal located on
the chain saw.
See your Sears Service Center to re-
place and sharpen individual cutters
on your chain.
TO REPLACE CHAIN:
1. Move ON/STOP switch to the STOP
position.
2. Remove chain brake nuts.
3. Remove chain brake.
Chai__
Brake 2_'_ / _'<'_.
4. Turn adjusting screw on bar coun-
terclockwise to move the tension-
ing rack as far as it will go toward
the front of the bar.
Tensioning Rack _
5. Slide guide bar behind clutch drum
until guide bar stops against clutch
drum sprocket.
6. Remove the old chain.
7. Carefully remove the new chain
from the package. Hold chain with
the drive links as shown.
Cutters Depth Gauge
Drive Links
8. Place chain over and behind
clutch, fitting the drive links in the
clutch drum sprocket.
9. Fit the bottom of the drive links be-
tween the teeth in the sprocket in
the nose of the guide bar.
10. Fit chain drive links into bar
groove.
11. Pull guide bar forward until the
chain is snug in the guide bar
groove. Ensure all drive links are
in the bar groove.
12. Install the chain brake.
13. Install chain brake nuts; finger
tighten only. Do not tighten any
further at this point. Proceed to
CHAIN ADJUSTMENT
CHAIN ADJUSTMENT
See CHAIN TENSION in the MAINTE-
NANCE section.
CARBURETOR ADJUSTMENT
_IL WARNING: The chain will be
moving during most of this procedure.
Wear your protective equipment and
observe all safety precautions. The
chain must not move at idle speed.
The carburetor has been carefully set
at the factory. Adjustments may be
necessary if you notice any of the fol-
lowing conditions:
• Chain moves at idle. See IDLE
SPEED-T adjusting procedure.
• Saw will not idle. See IDLE SPEED-T
adjusting procedure.
Idle Speed-T
Allow engine to idle. If the chain
moves, idle is too fast. If the engine
stalls, idle is too slow. Adjust speed
until engine runs without chain move-
ment (idle too fast) or stalling (idle too
slow).
17
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