SAW CHAIN TENSION
ADJUSTMENT
411 WARNING: Unplug chain saw from
power
source
before
adjusting
saw
chain tension.
WARNING: Cutting edges on chain
are sharp. Use protective gloves when
handling chain.
4Bk WARNING:
Maintain
proper chain
tension
always. A loose chain will in-
crease the risk of kickback. AIoose chain
may jump out of guide bar groove. This
may injure operator and damage chain.
A loose chain will cause chain, guide bar,
and sprocket to wear rapidly.
Note:
For pre-assembled
models,
the saw chain
tension is properly
set at factory.
A new chain will
stretch. Check new chain after first ,few minutes of
operation.
Allow chain to cool down. Follow steps
below to readjust saw chain tension.
1. Before adjusting chain, make sure guide bar nuts
are only finger tight (see Figure 2, page 8). Also
make sure adjusting block is in oval adjusting hole
on guide bar (see Figures 2 and 3, page 8).
2.
Turn adjusting screw clockwise
until all slack is
out of chain (see Figure 4). Note:
There should
be no gap between side links of chain and bottom
of guide bar (see Figure 5).
3.
Wearing
protective
gloves, move chain around
guide
bar. Chain should move freely. If chain
does not move freely, loosen chain by turning
adjusting
screw counterclockwise.
4.
After
chain tension
is correct,
tighten
guide
bar nuts firmly. If not, guide bar will move and
loosen chain tension. This will increase the risk
of kickback.
This can also damage saw. Note:
A new chain will stretch. Check new chain after
first few minutes
of operation.
Allow chain to
cool down. Readjust
chain tension.
Figure 4 - Turning Adjusting
Screw
Guide Bar Nuts
/
Incorrect Tension
Figure 5- Saw Chain Adjustment