Myford S7 clutch pulley shaft fitting

Myford S7 clutch pulley shaft fitting

This topic has 3 replies, 2 voices, and was last updated 26 September 2023 at 13:08 by Nick Passmore.

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26 September 2023 at 11:57 #661555
Nick Passmore
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@nickpassmore75850
Could anyone familiar with the Myford S7 help with a sanity check?

I would like to move the motor-drive belt-guard backplate a few millimetres further away from the countershaft mount (to suit a new 3-phase motor, the shaft of which is slightly short).

Have I understood correctly that the whole cone pulley and clutch assembly can be withdrawn without dismantling the clutch if I remove the grub screw from the cone pulley and the circlip next to that pulley? I could then introduce a couple of spacer washers behind the backplate.
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26 September 2023 at 11:57 #29392
Nick Passmore
Participant
@nickpassmore75850
Moving the motor-drive belt-guard backplate
26 September 2023 at 12:54 #661563
Norman Billingham
Participant
@normanbillingham91454
Yes. If you loosen the drive pulley grub screw, you can slide the pulley towards the tailstock, That gives enough clearance on the L to get a strong pair of bent circlip pliers in and release the circlip from its groove. The whole clutch/countershaft assembly will then slide out. Be careful not to lose the woodruff key, or the ball bearing in the RH end – both have a habit of vanishing into the depths of the machine – I'v never found my woodruff key – it was easier to buy a new one!

It's best not to dismantle the clutch unit – it has a powerful spring it it which can come out sharply and is difficult to compress back into place.
26 September 2023 at 13:08 #661565
Nick Passmore
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@nickpassmore75850
Many thanks Norman. Will pay close attention to small parts liable to escape!

Nick
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