JET Turret Mill JTM-4VS

Warning: Disconnect electrical power to the machine before performing any maintenance.

Operate spindle at its highest speed.

Disconnect electrical power. Remove junction box cover and disconnect wiring. Tag wires to identify leads for reinstallation.

Remove vent covers on both sides of head to provide access to the vari-speed belt and pulleys.

Remove the lower cover plate under the motor pulley (at the rear of the cover) by removing three cap screws.

Remove the four screws that attach the motor.

Connect a lifting sling to support and lift the motor during removal. Ease the motor up and forward on the housing.

Tilt the motor slightly toward the rear to slacken the vari-speed belt. Remove the vari-speed belt from the motor pulley.

Remove the belt; lift the motor clear of the housing.

Disconnect electrical power to the machine before performing any maintenance.

2. Remove vari-speed belt and upper housing.

3. Remove screws from lower housing cover.

4. Loosen the setscrew securing the brake pivot finger stud in the lower housing cover.

5. Move the pivot finger stud inward enough to remove the snap ring.

6. Pull the pivot finger stud out of the lower housing cover and the brake pivot fingers.

7. Before removing, note the orientation of the brake pivot fingers for correct positioning for re-assembly. Remove the pivot fingers.

If replacing the brake components only, skip Steps 8 and 9 and go to Step 10.

1) Knee leadscrew grease nipple:

Mobilith AW2, or equivalent - Service once each week.

Mobilith AW1, or equivalent - Service weekly when operating in back gear mode.

Machine vacuumed and brushed from chips and debris

Knee and table lead screws operated through full range of movement for lubricant distribution

Light machine oil applied to work table and other exposed metal surfaces

Vent panels removed to check pulleys and belts for unusual wear or grooving

Sign off on the turret mill maintenance

Warning: Disconnect electrical power to the machine before performing any maintenance.

New vari-speed belt installed on the driven hub

Sign off on the vari-speed belt replacement