On 2012-06-15, Ignoramus7592 wrote:
On 2012-06-15, Lloyd E. Sponenburgh lloydspinsidemindspring.com wrote:
I am in the middle of a top-end rebuild on my R2E4. It was making
excessive noise, and it turns out that a pulley bushing failed, galling
the motor shaft, and chipping out the key slot in the pulley.
Both the motor shaft and movable pulley half on the Vari-Speed drive
element must be replaced.
I have obtained the proper parts, and have the machine apart. In the
midst of this, I developed some "tricks" or strategies to get the motor
off without removing the head -- at least not removing it "completely".
This is the one which has the motor under the extension of the
head, instead of on top of it? Easier to get *off* with poor clearance,
but really nasty to get back in place.
One of the tricks which I remember is to take some channel and
drill it for one of the bolts which hold the halves of the housing
together (which happens to also fit a tapped hole in the end of the
motor shaft) and use the screw and channel to depress the sliding pulley
so the C-clip on the motor shaft can be removed -- to allow the sliding
half of the pulley to be removed.
Since this is (according to Hardinge) "impossible", I'm putting together
a photo-essay on how to do the whole thing without removing the head, and
FWIW, under an 8-foot ceiling. It's been tricky, but a little luck and
some ingenuity have panned out.
I'll be interested in seeing that when you have it done.
Lloyd
Lloyd, where did you get the parts?
I remember finding a place which would happily sell me things
like the pulley halves, the motor rotor with shaft (with the old one
going to them as a core charge) the bushings, and various other things.
However -- it has been perhaps fifteen years since I got them, so I'm
not sure that the company is still around. (I'm also not sure who they
were, but they had a nice exploded view of the heads.)
Good Luck,
DoN.
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