REFLECTOR: Gearbox alignment
Jim Sower
canarder at frontiernet.net
Tue Nov 16 01:07:07 CST 2004
<...you would need to weld all of the holes closed and have new ones
drilled ...>
Unless the gearbox can tolerate some tilting. If that is the case, you
can center the PSRU on the bell housing face (tilted 10'-20'), align it
right and drill new holes.
Try and keep it simple ... Jim S.
Alex Balic wrote:
>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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