Tracy, I can't see how can I check that? The transmission is no longer around. I'll consult with a machinist.
One idea is to measure distances on the engine and than see if they match the bellhousing?
Buly
On Jan 20, 2006, at 1:10 PM, Tracy Crook wrote: Buly, You may be correct about the .027" error causing the problem and I hope that is true. But, The key phrase here is "centered as the original transmission gear box". Is the transmission bolt circle concentric with the crankshaft? Is the transmission input shaft concentric with the bolt circle? They might be (I have not checked) but there is no rule saying they have to be. For example, the RX-7 starter looks as if the pinion is concentric with the starter pilot and pilot hole that it mounts in. It is not. Tracy ----- Original Message ----- Sent: Tuesday, January 17, 2006 11:49 PM Subject: [FlyRotary] Re: Coil & Alt cooling, Buly's input shaft
Tracy,
I picked up the resurfaced assembly today, and the machinist told me
that one end to the other of the gear box contact surface was .027 off.
I removed the original automatic transmission gear box from the
bellhousing and replaced it with my new mounting plate. So everything
was centered as the original transmission gear box. All the mounting
bolt holes were match drilled. With the extra long shaft, .027 will
give quite difference at both ends of the shaft.
I don't see anything else to check?
Buly
> Input shaft
>
> Buly, got your input shaft today and checked it out. The thrust
> bearing rollers & races look a little stressed but the roller cage
> has been completely trashed. I do not think the .005" out of
> flatness on your bellhousing would explain this and the odd wear
> pattern on the plate. The marks and discoloration (heat) on the
> bearing and shaft look as if there is misalignment between the E-
> shaft and the gear drive. When you built the plate & bellhousing
> adapter for the drive, how did you verify concentricity? This is
> much harder to do than verifying the parallelism of the bellhousing
> and plate but is absolutely vital. There is no question that the
> drive would have soon failed if you had continued to run it. Glad
> this showed up before flight.
>
> Tracy (Happy to hear that Dave L. is safe! Good flying. )
> <coil-alt coolingA.jpg>
> --
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