McCulloch MAC 140 - CHAIN MAINTENANCE; CHAIN TENSION; CHAIN SHARPENING

CHAIN MAINTENANCE
How you care for your chain saw determines the kind of
service you will get from it.
The use of McCulloch Depth Gauge Tools and a McCulloch
File Guide is recommended.
Chain should be kept clean and sharp for maximum cutting
efficiency.
CAUTION: Always wear protective gloves when handling
chain.
1. Top Plate
2. Side Plate
3. Depth Gauge
4. Gullet
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4. Repeat sharpening stroke until tooth is sharp. Drop file
into gullet and clean out with a few light strokes. Do not
touch cutting edge of the tooth.
5. Sharpen all teeth on one side of chain. before sharpening
teeth on the other side. Use same number of strokes on
each tooth to help keep all teeth the same length.
LOWERING DEPTH GAUGES
1. Place depth gauge tool over two cutter teeth with depth
gauge on first cutter projecting through desired clearance
of depth gauge tool. @
2. Remove projecting part of depth gauge with a flat file. @
3. After lowering all depth gauges, round off their leading
edges. Maintain same profile as on original depth gauge.
4. Always place depth gauge to be filed at same place on
bar when lowering depth gauges.
McCulloch saw chain is a precision manufactured cutting
attachment and requires regular inspection and care to main-
tain peak cutting efficiency. Touch up sharpening may be
required once or twice during a day's wood cutting. In some
areas where sand or other abrasives have become embedded
in the bark of trees, cutter teeth dull more rapidly and more
frequent sharpening may be required.
1. Chain can be sharpened on saw or place the chain in a
chain-filing vise.
2. Use a 5/32 inch (3.9 mm) round file and a file guide
marked for a 30° top filing angle. @
3. Hold the file at the correct top filing angle, apply pressure
against the face of the tooth, and push the file toward the
outside of the tooth. Release pressure on the cutting edge
on the return stroke.@
CHAIN TENSION
Check the chain tension frequently and adjust as often as
necessary to keep chain snug on the bar,·but loose enough
to be pulled around the bar by hand.
Over a' per10d of time the moving parts of saw chain
become worn which results in what is referred to as "chain
stretch".
When it is no longer possible to obtain the correct
chain tension adjustment, a link will have to be removed to
shorten the chain. See your McCulloch Servicing Dealer to
have this repair performed.
NEW CHAIN BREAK-IN
1. Run chain at low speed without cutting for 5 minutes.
Push manual oiler button every 10 to 15 seconds to pro-
vide extra oil.
2. After 5 minutes, shut off engine and recheck and adjust
chain tension.
3. Keep the chain well lubricated.
4. After 10 minutes, shut off engine and check chain tension.
Adjust if necessary. Repeat chain tension check often
during the first few hours of cutting.
CHAIN LUBRICATION
Make sure manual and automatic oiler are working. Keep oiler
tank filled with clean McCulloch Chain, Bar and Sprocket Oil.
Use plenty of oil on chain when cutting. Never let chain run
dry on the bar. In abrasive wood, use extra oil.
CHAIN SHARPENING ®
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