GUIDE
BAR MAINTENANCE
Bar
wear: Turn bar over frequently (at regular intervals) to
ensure
even wear on top and
bottom
of bar.
Bar
groove: Bar groove should be cleaned every
time
chain
is
removed. Run
depth
gauge tang or similarly sized instru-
ment along the groove
until
all residue is cleared. ®.
Oil
Passages:
Oil
passages
at
base
of bar should be cleaned
periodically to ensure proper lubrication of chain and bar
groove.
This
can be done
with
depth
gauge tang or any
instrument small enough to insert
into
passages.
®
NOTE:
New McCulloch
depth
gauges are designed
with
a
tang which is ideally suited for cleaning bar groove and oil
passages.
The
condition
of the oil
passages
should be checked before
each
use of the saw. While running the saw,
press
manual
oiler
button
a few times. If
passages
are clear, the chain
will
give off a spray of oil
with
a momentary acceleration of the
throttle.
Lubrication
of Sprocket Tip: For most non-professional usage
the sprocket tip
will
not require lubrication. However, lubrica-
tion
is
necessary
for professional usage and under the
follow-
ing circumstances:
1.
Continuous
cutting
of dry or highly abrasive wood.
2.
Continuous
boring
cuts.
3.
Continuous
cutting
with
the bar tip.
4.
Continuous
cutting
in wet or snowy conditions.
Under these circumstances lubrication is recommended after
one hour of hard usage or after three (3) tanks of gas are
consumed.
NOTE:
Thoroughly clean bar tip before lubrication.
Three
methods of lubrication for the sprocket tip may be
used:
1:
Needle Nose
Grease
Gun:
Clean
lubrication hole. Using a
general
purpose
chassis
lubricant of No. 1 consistency,
force grease
into
lubrication hole on one side of bar while
covering the lubrication hole on the other side. Rotate
sprocket and apply grease
until
it appears at edge of
sprocket. Repeat on other side of bar. ®
NOTE:
Lubri-Gun, P/N 68090, is recommended by
McCulloch Corporation for applying grease to sprocket tip.
Its
small nozzle is
necessary
for efficient application of
grease
to sprocket tip.
2.
Oil
Can:
Squirt the appropriate weight
motor
oil
(SAE
10 in
cold weather,
SAE
30 in hot weather)
into
lubrication hole
while
turning
sprocket. Repeat on other side of bar.
3.
Oil Soak:
Fill
a small container
with
clean oil and sub-
merge bar tip in oil. Rotate sprocket
several
revolutions.
Bar
tip may be submerged overnight for maximum
lubrication.
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