Speedi sleeves work very well. Have used them in the past with good results. Try your local bearing supplier. They do cost a bit though. The last one I purchased was for a Dexta rear axle and cost NZD80 (25-30 ponds).
Jerry Coles wrote:Do my eyes deceive me or is that a crack adjacent to the keyway?
Jerry,
Good observation - Yes it is a hairline crack
I hadn't noticed it. Shows the value of the internet & digital cameras!
The crack is about 3/4" long and penetrates through to the keyway slot.
Does it matter? There should not be a huge load on the pulley, when in use. However, I can feel the crack with my finger, so it is likely to wear the seal quicker. Perhaps another reason for a Speedi-Sleeve?
Have you managed to find another pulley for your spare engine?
There is a lot of side load from the belt tension so you may find it has occured due to these stresses and may result in a catastrophic failure later.
Probably best to get it ground out and welded up IMHO.
It may also have been caused by a bad fitting when it was put on the crankshaft - look at the woodruff key.
I'm currently rebuilding a short engine from Agriline and that crankshaft has a long key rather than a woodruff key.
Had to buy some key steel at the exhorbitant cost of £1.00 for 12" so if you want some let me know.
regards
Jerry
Jerry Coles
Camerton, Bath, UK
West Highland White Terriers, Dexta's, E27N's and DUKW's
I'm wondering if the 'spanner' I bolted to the pulley to undo the pulley nut puts an undue load on the keyway, which is clearly a weak point of the pulley. Maybe locking the crankshaft another way, such as putting the tractor in gear would be kinder on the pulley when doing up the nut?