[Mg-mmm] PB Crank Flange Removal.

[Sky Hoffman]

I've had this problem with large waste water pump impellers that are on
tapered shafts.  The fix was to use an hydraulic puller, heat the area with
a torch, and leave for the night.  The next morning the impeller had
separated from the shaft very nicely.  I suspect the shaft cooled down
faster that the impeller allowing for the separation.  Before succumbing to
this method, I'd get ahold of Phoenix and make sure you won't induce some
serious warping damage by using heat.  

Sky Hoffman
San Diego, CA. USA

-----Original Message-----
From: mg-mmm-bounces at autox.team.net [mailto:mg-mmm-bounces at autox.team.net]
On Behalf Of Clive Sherriff
Sent: Thursday, December 29, 2011 3:09 PM
To: jay at ukhistoric.com; mg-mmm at autox.team.net
Subject: Re: [Mg-mmm] PB Crank Flange Removal.

There is a bit of a problem with these flanges, in that the flange can in
effect fret weld itself to the taper.  An hydraulic puller and a damn sharp
tap (=clout!) with a 4 lb hammer might do the trick.  I've had this problem
a few times on Pheonix and other close tolerance taper shafts.  Have you
tried talking to John at Phx. about this?

Clive
Oxford UK
==================================

Clive
----- Original Message -----
From: <jay at ukhistoric.com>
To: <mg-mmm at autox.team.net>
Sent: Thursday, December 29, 2011 4:17 PM
Subject: [Mg-mmm] PB Crank Flange Removal.


> Hi all!
>
> Figured I'd finish off 2011 by stripping down the PB race motor for
> various reasons.
>
> I'm working now on removing the crank/flywheel flange.  After removing the
> flywheel, we noticed that the crank nut was loose.  The crank is a Phoenix
> crank and there are no provisions for locking the nut.  We have a
> substantial puller bolted to the flange using all bolts, yet have not been
> able to get the flange loose.
>
> What tricks can be used to break this free?  We've tried a long pipe on
> the puller wrench, a large air impact wrench(trying a bigger one over the
> weekend), and hitting the puller end with a hammer.
>
> Are the flanges available if this one needs to be cut off?  I'm concerned
> about the heat treatment of the taper due to the loose nut and vibration.
> Also concerned that the key has become lodged in the flange somehow.
>
> Thanks!
> Jason.
> GUR963 P-Lester
> PA, USA.
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