Propshaft bolts

Dave> The flange appears to be held on by a Dave> huge castellated nut. Can I remove this to release the Dave> flange or is that going to give me all sorts of other Dave> problems such as broken seals etc?

I believe you'll get a deluge of oil out of the gearbox when you remove it. I'd leave them where they are unless the threads are completely mullered. The important thing is to replace the nuts with new nylock ones.

Does the shaft need to be balanced or not when replaced ??

John H

Any new shaft should be balanced when you receive it. The same would apply to any shaft repaired/rebuilt by one of the specialists.

If you have made up a shaft from pieces and/or the balance weights have become rusted/torn off rebalancing would be advised.

Balance changes resulting from replacing the UJ spiders are usually insignificant

If you have dismantled an existing/new shaft which is otherwise OK be sure to align the marks (usually arrows) on the sliding portion to keep the phasing (angle of the end yokes in relation to each other) as intended and the balance undisturbed.

"Dougal" wrote...........

Balance changes *can* be quite significant when changing UJ spiders if you get the yokes 180 degrees out, mark them, and make sure they go back in the same place.

Martin

Point well made - the outer flanges need to keep their relationship to the rest of the shaft, too. The spiders themselves are not an issue.

Many thanks for the advice, I'll leave the castellated nut exactly where it is in that case. I'll do the job tomorrow if it's not too wet to lie underneath. It tipped down this afternoon.

Regards,

Dave.