National Flooring Equipment 4230, Service Manual, Page: 15 / 40

7. Raise cylinder to raise machine off of blocks. Remove blocks and lower machine.
8. Repeat on other side if necessary.
CHANGE CASTER
Keep clean and free of debris; ensure it can move freely.
1. Before replacing caster, try adding grease to zerk fitting to see if this helps caster move more freely.
2. To remove caster, machine will need to be raised. Push the cylinder lift lever forward to lower and adjust the angle of the cutting head to
jack up the machine. Block up machine with wooden block. Remove four bolts, pull caster off and clean/replace as needed.
3. Replace caster.
4. Pull caster toward rear of machine; replace and tighten the four bolts.
5. Lower the machine.
REPLACE SEAT
1. Disconnect machine from power.
2. Follow Remove Front and Rear Hoods procedure to remove hoods.
3. Remove four nuts securing seat rails.
4. Replace seat; replace and tighten nuts.
CLEAN WHEEL MOTOR BUILD-UP
1. Inspect the wheel motor and wheel motor hub for debris build-up (best accessed from back of machine). Remove any strands of carpet
and use compressed air (not high pressure) to clean out dust or glue build-up. If any build-up cannot be removed this way, complete the
following steps to remove the wheel hub.
2. Raise the front of the machine up by lowering the front cutting head down all the way, or by using 2 ton jack. Place blocks under the fork
lift cup.
3. Slowly raise the cutting head until the machine is resting on the blocks and the wheel on the side that is blocked up is raised off the ground.
4. Remove the cotter pin and loosen the center wheel hub nut.
5. To loosen the wheel from the wheel motor shaft you might need to hit the steel rim from the inside with a rubber mallet.
6. Remove the wheel and remove the build up off of the wheel motor shaft.
7. Re-mount the wheel hub, making sure that the keyway matches on the motor shaft. Tighten down the wheel hub nut to press fit in the
wheel hub.
8. Re-insert the cotter pin.
9. Lower the cutting head to raise the machine back off the blocks.
10. Repeat the process for the opposite side if needed.
Maintenance
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