02GF74
|
| posted on 19/8/09 at 07:31 AM |
|
|
driving belt and pulley alignment
I have toothed pulleys on my crossflow (crank, water pump and alternator) with toothed belt (aka Gates belt).
I notice that the pulley is off a little bit of the alternator pulley - picture shows it exaggerated.
Should I be worried?
The crank pulley has sides as shown in piccy so the belt should not fly off.
And how to fix it? I think if I shim the alternator mount out so that the rear of the pulley is a bit furtner out, the belt will want to run to the
smaller diameter circle i.e. the front.
Otherwise I need to make new alternator mount to put the alternator further forwards.
Which would be the better?
 
Rescued attachment pulley.JPG
|
|
|
|
|
MikeRJ
|
| posted on 19/8/09 at 08:53 AM |
|
|
Belts tend to move to the larger diameter if a pulley is not parallel. This is how early flat belts used on lathes, farm machinery etc. stayed on the
pulleys.
|
|
|
pewe
|
| posted on 19/8/09 at 10:12 AM |
|
|
Similar problem on mine. Local expert reckoned a 5mm run-out is acceptable but no more.
Cheers, Pewe 
|
|
|
