Jet J-3130, Operating Instructions And Parts Manual

Page: 13 / 28

13
Figure 13: Adjusting back-up bearings
Adjusting the arm stop adjustment bolt
Refer to Figure 1 .
1. Lower the arm to its fully lowered position. The
saw blade should be level and the cutting edge of
the blade should be in the relief slot,
below the level
surface of the saw base. If this is not the case,
adjust the arm height as follows:
2. Loosen the leveling bolt lock nut.
3. Adjust the leveling bolt until it supports the arm
and blade correctly as described above -- level and
below the top of the saw base.
4. Tighten the leveling bolt lock nut.
Adjusting motor switch actuator
This task should be performed whenever the arm
stop adjustment is corrected or whenever the saw
is turning off incorrectly.
Refer to
Figure 1 .
1. Raise the arm until the switch actuator is not in
contact with the switch.
2. Turn the switch ON.
3. Open the hydraulic control valve so the arm
moves slowly downward.
4. The motor switch should shut off just as the arm
contacts its horizontal stop bolt and the blade is
fully below the blade relief in the saw base. If the
motor shuts off too soon, or not at all, adjust the
switch actuator by bending it, as required, to correct
the fault condition.
Replacing a back up bearing
1. Remove the blade according to instructions 1
through 5 in
Changing blades .
2. Remove the guide bearing assembly from the
Figure 12: Checking blade tracking
Replacing guide bearings
1. Remove the blade according to instructions 1
through 5 in
Changing blades, page 11
2. Remove the snap ring which holds the bearing to
the shaft.
3. Press off the bearing.
4. Press on the new bearing and secure it with the
snap ring.
5. Reinstall the blade according to instructions 6
through 10 in
Changing blades .
6. Adjust the bearing spacing according to instruc-
tions in
Adjusting guide bearing s.
Adjusting back-up bearings
Refer to Figure 13 .
1. Disconnect the saw from its electrical power
source.
2. Loosen the guide bearing seat retaining bolt.
3. Slide the bearing seat as necessary until the
back-up bearing just touches the back edge of the
saw blade.
4. Tighten the guide bearing seat retaining bolt.
5. Restore electrical power to the saw.