Wen 3939, Instruction Manual, Page: 12 / 24

ASSEMBLY & ADJUSTMENTS
ADJUSTING BLADE TENSION
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2
Fig. 8
Fig. 9
WARNING! If the blade tension is too high, the blade may
break. If the tension is too low, the blade may slip, stall, or
wander during a cut.
WARNING! Blade teeth are sharp! Use care, ANSI Z87.1-
approved eye protection, long sleeves, and protective gloves
when handling the saw blade. Failure to comply may cause
serious injury.
1. Raise the upper blade guide (see “RAISING AND LOWERING
THE UPPER BLADE GUIDE”).
2. Open the upper door.
3. With a gloved finger, gently press the blade sideways. Take this
measurement at the left side of the saw, before the blade touches
the upper wheel. When tension is properly adjusted, the blade
should not move more than 1/8-inch.
4. Use the blade tension knob (Fig. 9 - 1) to make fine adjust-
ments to the blade tension. Turning the knob clockwise will in-
crease blade tension; turning it counterclockwise will decrease
blade tension.
RAISING AND LOWERING THE UPPER BLADE GUIDE
The height of the upper blade guard should be adjusted prior to
every cut. The blade guide should always be positioned as close
to the upper face of the workpiece as possible – no more than 1/8
inch (3mm).
1. Loosen the adjustment locking knob (Fig. 10 - 1) on the rear of
the saw. Use the adjustment knob (Fig. 10 - 2) to adjust the height
of the upper blade guide. Tighten the adjustment locking knob
once the desired setting has been reached.
Fig. 10
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