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Knowledge Base : Changing the belt on the CL3 & CL4 Lathe

I need to replace the drive belt on a CL3 lathe, is it an easy enough job and do I need any specialist tools?

Replacing the drive belt on�both the�CL3 & CL4 lathes�is a fairly straight forward procedure, no specialist tools are required you will need:
> Mallet
> Solid brass rod (drift) approx 1/2" dia.
> Set of metric allen keys

To replace the drive belt you must first remove the�phosphor bronze�bearing�this is done by removing the inner locking ring so the ring is loose on the shaft. Now remove the socket head cap screw and washer on the back end of the shaft, take out�the first grub screw in the spindle pulley and loosen the�lower grub screw, the pulley should now float freely on�the shaft. The phosphor bronze bearing can now be removed through the front of the headstock.�Using the brass rod and mallet drive the spindle from the back end of the headstock towards the front, once the spindle has been released from the back bearing this allows the drive belt to be changed. After the belt has been changed reverse the�procedure to re-assemble the headstock, but ensure that�when driving the spindle back in from the front�, the thread�protector is fitted. As the spindle is being driven in, it must�rotated by�hand at each strike of the mallet, this prevents the spindle and bearing being damaged and�'flatted'. As�the spindle�seats in the back bearing you will hear a tone change in the casting.�Once re-assembled please refer to our 'adjusting�phosphor bronze�bearing' article.��If in doubt please refer to your instruction manual which details the belt change procedure.

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