Craftsman 316.34107 - Manual (Page 18)

18
Sprocket Tip Lubrication
The Lube Gun (not included) is recommended for applying
grease to the guide bar sprocket tip. The Lube Gun is
equipped with a needle nose tip which is necessary for
the efficient application of grease to the sprocket tip.
The sprocket tip on
your new saw has
been pre-lubricated at the factory. Failure to
lubricate the guide bar sprocket tip as
explained below will result in poor perform-
ance and seizure, voiding the manufacturer’s
warranty.
Lubrication of the sprocket tip is recom-
mended after each saw use. Always thor-
oughly clean guide bar sprocket tip before
lubrication.
CAUTION:
Fig. 28
To lubricate the sprocket tip:
1. Unplug the chain saw from the power source.
NOTE: It is not necessary to remove the saw chain to
lubricate the guide bar sprocket tip. Lubrication
can be done on the job.
2. Clean the guide bar sprocket tip.
3. Using the Lube Gun (optional), insert tip of lube gun
into the lubrication hole and inject grease until it
appears at outside edge of sprocket tip (Fig. 28).
4. Make sure that the Chain Brake® is deactivated.
Rotate saw chain by hand. Repeat lubrication proce-
dure until the entire sprocket tip has been greased.
GUIDE BAR MAINTENANCE
Frequent lubrication of the guide bar is required. Proper
maintenance of the guide bar, as explained in this section,
is essential to keep your saw in good working condition.
MAINTENANCE AND REPAIR INSTRUCTIONS
Ensure that the
power cord is dis-
connected before performing any mainte-
nance on your saw.
WARNING:
Always use protective
gloves when handling
the saw chain.
WARNING:
Maintenance Procedures
Most guide bar problems can be prevented merely by
keeping the chain saw well maintained. Incorrect filing and
non-uniform cutter and depth gauge settings cause most
guide bar problems, primarily resulting in uneven bar wear.
As the bar wears unevenly, the rails widen, which may
cause chain clatter and difficulty in making straight cuts.
Insufficient guide bar lubrication and operating the saw with
chain that is too tight will contribute to rapid bar wear.
To help minimize bar wear, the following guide bar mainte-
nance procedures are recommended:
BAR WEAR - Turn guide bar frequently at regular intervals
(for example, after 5 hours of use), to ensure even wear on
top and bottom of bar.
BAR GROOVES (B) (Fig. 29)- Bar grooves (or rails which
support and carry the chain) should be cleaned if saw has
been used heavily or if saw chain appears dirty. Rails
should always be cleaned every time saw chain is
removed.
OIL PASSAGES (A) (Fig. 29)- Oil passages on the bar
should be cleaned to ensure proper lubrication of the bar
and chain during operation. This can be done using a soft
wire small enough to insert into the oil discharge hole.
NOTE: The condition of the oil passages can be easily
checked. If the passages are clear, the chain will
automatically give off a spray of oil within seconds
of starting the saw. Your saw is equipped with an
automatic oiler system.
Cleaning Bar Rails
1. Remove sprocket cover, bar and chain. Refer to the
Install the Guide Bar/Saw Chain section.
2. Using a screwdriver, putty knife, wire brush or other sim-
ilar instrument, clear residue from the rails on the guide
bar. This will keep the oil passages open to provide
proper lubrication to the bar and chain (Fig. 29).
3. Reinstall the bar, chain, sprocket cover, tighten knob,
and chain tension ring. See Section Install the Guide
Bar / Saw Chain for more information.
Fig. 29
A
B