CHAIN MAINTENANCE
CHAIN SHARPENING ®
How you care for your chain saw defermines 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.
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
period
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.
CAUTION:
Never have more than three (3) links removed
from
a
chain.
This
could
cause
damage to the sprocket.
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.
Restart and 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.
FILE
SIZE
TABLE
CHAIN
FILE
PM
350
PM
403
PM
503
SM
403
PM
370G
PGR
370G
SPR
370G
SPR378G
SPR
403
3/16 in. (4,7mm)
7/32 in. (5,4mm)
1/4 in. (6,25mm)
7/32 in. (5,4mm)
7/32 in. (5,4mm)
3/16 in. (4,7mm)
7/32 in. (5,4mm)
7/32 in. (5,4mm)
7/32 in. (5,4mm)
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.
WARNING: Always wear protective gloves when handling
chain.
NOTE:
In addition, all saw chains should be periodically
machine sharpened to maintain correct
cutting
angles.
1.
Chain can be sharpened on saw by placing the bar in a
bench
vise
while resting the saw on the bench.
2.
Use a
round
file
of the proper
size
for all PM, SM,
SPR
and
PGR
chains, and a
file
guide marked for the correct
filing
angle.
Refer
to the
file
size
table and the
filing
angles
illustrated for the types of chain. If
filing
without
the
file
guide, place
file
on
tooth
to be sharpened
with
one-
seventh
of the
file
above the top plate edge. Avoid
holding
the
file
too low or too
high
and causing a
"hook"
or ari
"backslope."
Always
file
toward the outside of the chain.rr
3.
Hold
the
file
at the correct top plate
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.®
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.
Hold
the
file
level for all PM chains except PM 378.
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