REFLECTOR: Gearbox alignment

[Alex Balic]

Wayne-
You can buy a dial indicator and a magnetic base/arm from Harbor freight
tools rather reasonably to check for run out- you might be able to re-face
the bell housing to change angular run out, but to move the center, you
would need to weld all of the holes closed and have new ones drilled- not
too fun- what would you guess the misalignment is anyway?

Alex

-----Original Message-----
From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org]On
Behalf Of Wayne
Sent: Monday, November 15, 2004 5:05 PM
To: Velocity Aircraft Owners and Builders list
Subject: Re: REFLECTOR: Gearbox alignment



----- Original Message -----
From: "Jim Sower" <canarder at frontiernet.net>
To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
Sent: Monday, November 15, 2004 12:29 PM
Subject: Re: REFLECTOR: Gearbox alignment


> <... How would you measure the axial and radial run-out  of the input
> shaft ...>
> I would try a dial indicator.

Im thinking about some kind of fixture to bolt to the crankshaft with a dial
indicator incorporated into it.
>
> <... in order to  relocate the mount and improve the alignment ...>
> I would explore the possibility that the gearbox is offset from the engine
> output shaft.  You have some sort of bell housing that mounts to the
> engine and to which the gearbox is mounted.  If the gearbox case is wrong,
> the input shaft of the gearbox will be offset from the output shaft of the
> engine.  That might cause the problem(s) you have.  I can't speculate
> further without more facts.

Exactly  I believe Marcotte's bell housing  has the input shaft hole hole
in the wrong location. The perimeter bolts and the locating pins fit well
onto the engine.
>
> How big is the hole the bushing is in?  Could it be replaced by a bearing
> race

It was a bearing before and that helped to mask the misalignmet.
... Jim S.
>
> Wayne wrote:
>


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