Jet J-3130, Инструкция по эксплуатации и каталог запасных частей

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11
Changing blades
1. Disconnect the saw from its electric power
source.
2. Lift the saw arm to its full up position and lock it
up using the hydraulic feed control knob.
Note: Use the handle on the arm to lift the arm.
Never use any other part of the arm as a lifting
method.
3. Remove the blade guard cover thumb screw and
open the cover.
4. Loosen the blade tension knob until the blade
comes off of its wheels.
5. Using leather gloves to protect from cuts, slip
the blade out of the blade guide bearings and off of
the saw.
6. Examine the drive and idler wheels for evidence
of wear on the flanges. If the flanges are wearing,
the blade is misadjusted. See
Blade tracking for
correcting this condition.
7. Put a replacement blade in the blade guide
bearings and loop the ends of the blade over the
drive and idler wheels.
Note: The saw blade teeth must point in
the direction of travel. See
Figure 10 .
8. Use the blade tension knob to put tension on the
blade until it no longer slips on the wheels.
Note: Do not overtighten the blade. Just increase
tension until the blade does not slip on the wheels.
9. Close the blade guard cover and replace and
tighten the thumb screw.
10. Reconnect the saw to its electrical power
source.
Figure 10: Corrrect tooth direction when replacing
blade.
Maintenance
Note: The following maintenance operation
requires the services of a licensed electrician.
Motor replacement
1. Perform steps 2 through 5 in Changing blade
speeds , page 8.
2. Remove the drive belt.
3. Remove the set screw which retains the motor
drive pulley to the motor shaft.
4. Pull the pulley off of the motor drive shaft.
5. BEING CERTAIN THAT THE SAW HAS BEEN
SAFELY DISCONNECTED FROM THE SERVICE
BRANCH, open the motor terminal cover and
remove the three wires which connect it to the
power cable.
6. Remove the four nuts, bolts and washers which
hold the motor to its mounting plate.
7. Remove the motor from the saw.
8. Reinstall the replacement motor and pulley by
reversing steps 7 through 4, above.
9. Loosen the the motor mounting plate adjustment
screw so the screw puts no tension on the plate.
10. Adjust the position of the motor so --
A. the pulleys are parallel with each
other, and
B. the drive belt can just be installed over
the pulleys (It may be necessary to
adjust the drive pulley along the motor
shaft to make the pulleys parallel.)
11. Tighten the motor mounting bolts securely.
12. Tighten the pulley set screw securely.
13. Install the drive belt.
14. Tension the drive belt and complete the re-
placement task by performing instructions 6 through
9 in
Changing blade speeds .
Adjusting guide bearings
The outside guide bearing on each of the bearing
seats is mounted on an eccentric shaft to allow
adjustment of the bearing clearance between
bearings and blade, as follows:
1. Loosen the guide bearing shaft lock nut.
2. Use an open end wrench on the hex flats under-
neath the guide seat to adjust the eccentric shaft so
the bearing holds the blade vertically against its
opposing bearing. Overtightening the blade be-
tween the bearings will only shorten bearing life.
Adjust the bearings so the blade is just held firmly
in a vertical position.
3. While holding the shaft from turning, tighten the
lock nut on the upper side of the bearing seat.
Adjusting blade guides
Refer to Figure 1 .
Both the left and right blade guides should be
positioned as close as possible to the left and right
edges of any work piece being cut. This provides
support to the blade so it can make a straight cut.
1. Loosen the blade guide knobs.
2. Slide the blade guides to the correct spacing.
3. Tighten the lock knobs securely.