Service And Adjustments; Cleaning The Spark Arresting Screen; Chain Replacement - Craftsman C944.411420 Instruction Manual

CLEANING THE SPARK 1. Loosen 3 screws on cylinder cover.
ARRESTING SCREEN 2. Remove the cylinder cover.
Cleaning is required every 25 hours of 3. Pull off the spark plug boot.
operation or annually, whichever 4. Remove spark plug from cylinder
comes first, and discard.
1. Loosen and remove the 2 muffler 5. Replace with Champion CJ-7Y
cover screws, spark plug and tighten securely
2. Remove the muffler cover (cover with a 3/4 inch socket wrench.
snaps off muffler body). Spark plug gap should be 0.025
3. Remove muffler diffuser and spark inch.
arresting screen assembly. Notice 6. Reinstall the spark plug boot.
the orientation of parts for reas- 7. Reinstall the cylinder cover and 3
sembling, screws. Tighten securely.
4. Clean the spark arresting screen Screws
with a wire brush. Replace screen Cylinde
if breaks are found. Spark Cover
5. Replace any broken or cracked Plug Boot
muffler parts.
6. Reinstall diffuser and spark arrest-
ing screen assembly with round Spark
holes facing up. Plug
7. Reinstall muffler cover and 2
screws. Tighten securely. REPLACE FUEL FILTER
REPLACE SPARK PLUG To replace the fuel filter, drain your unit
The spark plug should be replaced by running it dry of fuel. Remove fuel
each year to ensure the engine starts cap and its connected retainer from
easier and runs better. Ignition timing tank. Pull filter from tank and remove
is fixed and nonadjustable, from line. Replace and reassemble.
,_ 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 spe-
cified in the repair parts list. The cor-
rect replacement bar and chain is also
specified on a decal located on the
chain saw.
See your Sears Service Centre 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.
Chain
Brake
4,
17
Chain Brake
Nuts
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.