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Myford ML7 spindle removal/replacement

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Steve White12/12/2009 21:35:00
11 forum posts
2 photos
Hi there, my trusty old Myford ML7 has developed a problem and I wonder if anybody can help me please?
After a few minutes use, the pulley starts to slip on the spindle and even though the countershaft is turning, the spindle slows to a halt during a cut.
Tony at the lathes.com site has advised me that the pulley has come loose and says that I should remove the pulley, clean it and replace it using some Loctite.
Has anybody done this? I am a bit worried that if I take everything to bits to rectify the problem, it won't go back together again without problems.
Will I have to reshim the bearings or something? How can I tell if all is well?
 
Many thanks in advance
Steve White
mgj13/12/2009 00:39:17
1017 forum posts
14 photos
No, its not difficult to take apart, or put back together. If you don't have a manual, just strip it down and lay the bits out as you took them off.
 
if you don't want to loctite the pulley together, go to Myfords and ask for the price of a new pulley.....  Just do as he says,  and degrease properly. Half the Dore Westbury mill is held together with Loctite Retainer, and mine has lasted 24 years.
 
You'll know if all is not well. Either you'll lock up the spindle and it won't turn, or it will be too loose and work will chatter. And you'll adjust it according, and then it will work.
 
You may need to knock up a peg spanner for the spindle retaining nut.. chunk of steel, tommy bar hole and 2 pins. Can't remeber.:Long time since I stripped an ML7 down to its last nut and bolt, but I refurbished one for a friend. If I can do it without a manual, so can you. Ain't rocket science.

Edited By meyrick griffith-jones on 13/12/2009 00:40:48

Steve White13/12/2009 22:45:25
11 forum posts
2 photos
Many thanks for your advice, I'll give it a go and give the whole machine a once over while I'm at it.
regards
Steve
 
 
Steve White06/01/2010 21:29:51
11 forum posts
2 photos
Just a note to say that I've completed the rebuild of the Myford spindle pulley/gear assembly and as Meyrick says, it's not difficult. I was lucky, however, in that the pulley almost dropped off with it's own weight, it was that loose! A clean and a touch of Loctite and all's well.
I was surprised at the good condition of the bearings considering the age of the lathe, must be something to do with the fact that the oilers never completely shut off...
To anyone else with the problem, I can recommend the same cure.
Steve

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