Adjusting Bed Clamping; Changing Belt And Bearings; Trouble Shooting; Environmental Protection - Jet 4224B Mode D'emploi

Inspect the proper function of the dust collection daily.
Defective safety devices must be replaced immediately.
Repair and maintenance work on the electrical system may
only be carried out by a qualified electrician.
(Warning: Wait five minutes for DC-bus capacitors
discharge before accessing the AC drive unit!)

8.1 Adjusting bed clamping

If adjustment is needed, remove the stop bolt on end of bed
(A, Fig 36).
Slide the headstock, tailstock or toolrest to the edge of the
bed and slightly turn the hex nut (B; Fig 42).
Test the clamping function and repeat if necessary.

8.2 Changing belt and bearings

Changing belt and bearings can be a difficult task.
By chance, remove headstock and take into a repair
station for servicing.
Disconnect the machine from the power source.
Open the door and remove the belt from the lower pulley.
Loosen two set screws (A, Fig 43) and unscrew the hand
wheel.
Fig 42
Fig 43
Loosen and remove the clamping nut (B) and lock washer (C).
Use a wood dowel, or aluminium stock to knock spindle
towards the tailstock. (Use a material that is softer than the
spindle so you do not mushroom end of spindle).
Go only far enough to remove the belt from spindle.
To reassemble reverse the procedure.
When reinstalling clamping nut, thread it on to the spindle until
its snug. Then back off slightly and tighten the lock washer.
Note:
To remove the pulley for bearing replacement it is needed to
loosen the 2 set screws (E, Fig 44).
Make sure the pulleys are oriented properly after reassembly
for straight belt running.

9. Trouble shooting

Motor doesn't start
*No electricity-
check mains and fuse.
*Defective switch, motor or cord-
consult an electrician.
*Overload detected on AC-drive unit-
wait and restart machine; chose low speed range belt setting
(0-910 rpm) for better torque.
Machine vibrates excessively
*Stand on uneven floor-
adjust stand for even support.
*Workpiece is not properly centred
*The speed is too high

10. Environmental protection

Fig 44