Myford Mk 1 S7

[brickyParticipant @bricky]

Hello all

I own two Myfords a Mk1 S7 and a large bore S7 plus. Whilst making a fittment for the large bore I had to use the 60 year old lathe.I haven't used it for a long time and the clutch started to slip.Has anybody taken the Mk1 clutch to pieces and can it be repaired and if so how and what are the pitfalls during dismantling.I hope someone can help because the bed was reground 10 years ago and is very accurate lathe still .

Frank

[brickyParticipant @bricky]

[davebParticipant @daveb17630]

One thing to watch out for, the clutch shoes may contain asbestos, use sensible precautions when handling them, do not blow dust out. I believe the original shoes were made for moped brakes, check with classic motorbike parts suppliers if they need relining.

[RobboParticipant @robbo]

Daveb, the Super 7 clutch doesn't have linings, that's the ML7 clutch. The Super 7 Mk1 is inside the pulley cone and is an expanding horseshoe type.

Frank, there have been a lot of previous threads on the Super 7 Mk1 clutch. Have a look for those. Will come back to this but have to take dog to vets just now.

[RobboParticipant @robbo]

Frank,

Had a look at previous threads, couldn't find the info I was looking for, so started from scratch. Here are a page from a Mk 1 manual re clutch adjustment, and a parts drawing annotated by me. These will probably help you. If the clutch has just started to slip it probably just needs adjustment.

I am sure the current owners of the Myford name won't mind these being here, as AFAIK they are not in any publication currently sold by them.

 

As usual the site system has buggered my placement of the pics and left the text between them but I am sure you can work round that.

Edited By Robbo on 11/05/2017 21:24:23

[Brian OldfordParticipant @brianoldford70365]

Recent acquisition of a PCF S7 means the Mk1 I have been using up until recently is up for disposal, When I first got the Mk1 the clutch was slipping very badly. Fortunately the clutch ring was OK however the "brake-drum" in which it works was very badly worn. I repaired it on a friends lathe by boring it out and, using loctite, fixing an insert in made from a piece of continuously cast iron. After reassembly and readjustment it has continued to serve me well as I'm sure it will the next owner.

[brickyParticipant @bricky]

Robbo,thank you for the trouble that you have taken to find this information ,I will clear the area around the lathe as I am sure to drop something as I dismantle the clutch and see if I can repair it.The diagrams are very helpful. I have a spair pully that houses the clutch that came with the lathe 30 years ago Brian ,and when I have got it dismantled I will use it.Thanks again for your responses.

Frank

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