Wellsaw 1348 - Manual (Page 8)

6
PLACING THE BLADE ON SAW
S/N’s up to 1999
1. Raise saw frame.
2. Open idle and drive wheel guards.
3. Remove blade brush drive belt by loosening
thumb screw.
4.
Loosen Rite Tension® take up screw and
remove old blade. In the event of a broken blade,
be sure Rite tension® is open by turning take up
screw counter-clockwise at least six (6) times.
5.
Uncoil new blade, wearing gloves to protect
your hands. Make certain blade teeth point in the
direction of blade travel which is toward the
motor.
6.
Place new blade on the guides and on band
wheels.
7.
Grasp blade on frame side and push it
toward guide bracket beam to hold it in position
while turning Rite Tension® take up screw.
8.
Tighten blade to proper tension. Blade is
properly tensioned when the take up screw is
tightened until mechanism bottoms.
After S/N 1999
To insert a new blade, turn the Adjusting Knob
(item 17 in the parts diagram) on the blade guide
Counter Clockwise (CCW) until it stops. Insert
the new blade and turn the Adjusting Knob
Clockwise (CW) until it stops. The spring loaded
carbide guides will then be in proper contact with
the sides of the blade. The back of the blade
should just touch the carbide back up guide (15
in the parts drawing). The side bearings should
have a gap of .038 for the .035 thickness blade.
Wheel Pitch Adjustment
If the saw blade runs too low, runs off the wheels,
or runs too high and rubs the wheel flange, a
wheel adjustment must be made.
Loosen the blade before making the following
adjust-ments.
Idler Wheel:
Blade running too low or off the wheel- adjust the
idler wheel block. Loosen the two cap screws in
the block, opposite the take up screw end, one-half
(%) turn. Tighten the opposite two cap screws
one-half (%) turn. Repeat if necessary.
Blade running too high and against the idler
wheel flange- The blade can become distorted, its
top edge rolled over and wheel flange will wear
excessively.
To correct this, loosen the two cap screws closest to
the take up screw one-half (%) turn. Tighten the
opposite cap screws one-half (%) turn. Repeat if
necessary.
Drive Wheel:
Blade running too low or off the drive wheel-Loosen
the two cap screws opposite the outside end of the
wheel plate one-half (%) turn. Tighten the two set
screws on the same end one-half (%) turn. Repeat if
necessary.
Blade running too high, and against the drive wheel
flange- Loosen the cap screws closest to the outside
end of the wheel plate and loosen the two set screws
at the same time by the same amount. Repeat if
necessary.
Make certain all screws are tight after adjustments
have been made.
Variable Speed Drive
Models 1118, 1338, 1348 and 1316S are equipped
with variable speed pulleys providing infinite speed
selection between 70 and 375 feet-per-minute. See
Cutting Speed Chart for settings.
To vary blade speed, rotate handwheel clockwise to
increase speed or counter-clockwise to decrease
speed. Do not adjust the speed unless the pulley
system is in operation (spinning). The handwheel
drag is set at the factory during assembly. This drag
prevents handwheel “creep” during operation but
still permits easy adjustment. Due to normal wear
and environment, the drag setting may change. To
readjust, tighten set screw in thrust nut.
Gear Box Repair
1. Remove gear box from saw.
2. Remove four machine screws holding gear box
together.
3.
Separate gear box by carefully prying castings
apart at a location near pulley shaft. Caution: Do
not use excessive force.
4.
Once the gear box is open, the internal parts
may be inspected for wear.
5.
Liquid plastic gasket is used to seal the gear
case, Loctite No. 51580 or equivalent.
6.
Grease, Mobilgrease XHP 220 or
equivalent is recommended. The grease must
have excellent clinging characteristics. (See
Lubrication).