Maintenance - Craftsman 316.34107 Operator's Manual

MAINTENANCE AND REPAIR INSTRUCTIONS
SAW CHAIN TENSION ADJUSTMENT
WARNING:
handling the saw chain.
Proper tension of saw chain is extremely important and
must be checked before starting, as well as during any
cutting operation.
Taking the time to make needed adjustments to the saw
chain will result in improved cutting performance and pro-
longed chain life.
NOTE: A new chain and bar will need readjustment after
as few as 5 cuts. This is normal during the break-
in period, and the interval between future adjust-
ments will lengthen quickly (Fig. 22).
CAUTION:
TIGHT, the sprocket, bar, chain, and crank-
shaft bearings will wear more rapidly. Study
Fig. 22 for information concerning correct
cold tension (A), correct warm tension (B),
and as a guide for when saw chain needs
adjustment (C).
NOTE: Make sure the Chain Brake® is disengaged.
Disengage the Chain Brake® (D) by pulling it backward
(Fig. 23).
1. Tensioning the chain can be accomplished with rela-
tive ease. Turn knob (E) counter clockwise. Then turn
ring (F) counter-clockwise to loosen chain or clockwise
to tighten chain (Fig. 24).
A
Always use protec-
tive gloves when
If saw chain is TOO
LOOSE or TOO
B
C
Fig. 22
2. After adjustment and while wearing heavy duty work
gloves, move the saw chain back and forth on the
guide bar to be sure the chain moves freely and is in
proper mesh with sprocket.
NOTE: If the chain is difficult to rotate or if it binds on the
guide bar, too much tension has been applied and
must be adjusted as described in step 1.
3. While applying tension to the chain, hold the tip of the
bar up and then tighten the knob (E).
15
Fig. 23
E
F
Fig. 24