Sleeve gear bushes replacement

[BSA500]

Got the box apart and guess what the bushes are the long and short type. Also the play was awful but on measuring the shaft was 0.812 and the worn bush 0.816 only 4 thou . Still it does need doing so we will see how it is afterwards.

[BSA500]

Done. The first measurements were wrong the shaft was .809 and the old bush 0.816. New one is in, and a vast improvement some vibration still but no snatching from the primary chain.

[BSA500]

Tempting fate here all seems fine (whispering now )the box does not leak shhh

[muskrat]

Did you put any oil in?

[BSA500]

Cheeky sod. Yes I did 80/90 but I have used 140 before now.

[BSA500]

Update-replaced the primary chain as its well past its sell by date and noisy. Guess what yep the play is back in the clutch large amount of up and down play. WTF!! is going on here. Any other suggestions? the gearbox sprocket does not move so I am ruling out the main bearing.Surely the bushes cannot have worn out in one month can they???. God I wish I had some beer, and on top of it all work is being a pain in the a**e as well. I have got my health (still want a beer).
Andy

[muskrat]

 It must be in the clutch bearing. What type of clutch? Most will wobble a bit even when new.
Cheers

[BSA500]

Its the four spring type with the roller bearings. Its not a wobble as such more an vertical up and down and quite a lot could it still be the bearings?

[muskrat]

Could be if the rollers are the wrong size or the bearing surfaces (ID of chainwheel or center adapter) are worn. Is the center adapter a good fit on the taper?
Cheers

[BSA500]

The rollers are about twenty plus tears old so they may need replacing  . What I will do is strip it down and check for play in the bearing and shaft and hope its the clutch as it the far easlier to fix.

[Topdad]

Andy, just a thought ,has you have changed the p/chain you didn't adjust it to  tight ? easy to do and I beleive that'll kill the bearings double quick although I hope its just the cluth rollers, best wishes BobH

[Triton Thrasher]

Andy, just a thought ,has you have changed the p/chain you didn't adjust it to  tight ? easy to do and I beleive that'll kill the bearings double quick although I hope its just the cluth rollers, best wishes BobH

It can become too tight when the rear chain pulls the gearbox back.

[BSA500]

Nope both the primary and rear chains are the correct tension.

[BSA500]

Shows how often I do this stripped down the primary side and back together in 1 hour 10 mins. This was clutch off and the inner primary. Conclusion the bushes are toast in under a month. Were they made from cream cheese??. Got them from Draganfly and as I have said before I seem to have problems with late delivery,wrong parts and missing items. I did drill in oil holes and the shaft was wobble free when I put it together. I shall have to do it again but I will try C&D Autos this time. Any other ideas/pointers/free beers

[Triton Thrasher]

I'm told it's easier to make wearing parts from free machining brass than from phosphor bronze, aluminium bronze or oilite, but it doesn't last well.