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GENERATOR/FAN BELT~
s-deez - February 10th, 2006 at 05:28 PM

hi just a quick 1

when my engine is running there is a fair bit of movement in the top part of the outer pully of generator, i have tightned the front nut & it didnt make a lot of difference,
do i need to tightn the back nut behind the fan house(what size socket?) or is there any other places to stop this loud knocking~ thanks All~

Old Dubber - February 10th, 2006 at 05:33 PM

With the engine stopped!!!!!
Can you move the pulley back & forth?
Can you put your hand around to the fan and do the same?

s-deez - February 10th, 2006 at 06:37 PM

Quote:
Originally posted by Old Dubber
With the engine stopped!!!!!
Can you move the pulley back & forth?
Can you put your hand around to the fan and do the same?


yes~
not sure about the second1~

pod - February 10th, 2006 at 07:03 PM

has it got all the spacers for tensioning the fan belt might be missing some, so the nut will tighten up but not the pulley:td:

s-deez - February 10th, 2006 at 07:22 PM

Quote:
Originally posted by pod
has it got all the spacers for tensioning the fan belt might be missing some, so the nut will tighten up but not the pulley:td:


not sure about spacers but yea the nut is really tight & there still is movement~

s-deez - February 10th, 2006 at 07:55 PM

Yes there is movement when i pull the bolt @ the back & that is the knocking that occurs when running~

dirty hands - February 11th, 2006 at 12:15 AM

i had the back fan nut come loose a lot of times
also the shroud of the motor used to move and scrape the fan

i just retightened the rear nut back up

if you got too much movement it might be a bearing worn out

as for the shims in the belt pully you just have to move them around untill you get the right tension on the belt but not too tight you can stuff up your genny if you have the belt too tight

s-deez - February 11th, 2006 at 06:55 PM

hi thanks, just wonder what size socket tightns up the rear back fan nut, i aint got any that big~

ctefeh - February 12th, 2006 at 09:46 AM

36mm. I got a spare 1/2" drive one..u2u if you want it.

You should have at least 8 shims for the gen/alt pulley, and some spares as you use these to clearance the fan to backing plate.

The washer on the fan should be a waved type. Check it isn't flat or someone else hasn't just bunged on whatever fitted.

If you have shims and both nuts are tight and it still wobbles around....I'd be taking it out to fix whatever is wrong. As dirty hands suggested, you could have knackered bearings.


Ctefeh.

s-deez - February 12th, 2006 at 10:26 AM

he ctefeh
thanks for that & thanks to all~
got me a job this arvo~

s-deez - February 13th, 2006 at 08:17 PM

he ctefeh, all
borrowed a 36mm back bolt tight,
removed pulley, have only got 2 very thin flat spacer washers, maybe the problem can i get just any type of washer that size??

thanks~

ctefeh - February 13th, 2006 at 11:27 PM

Hi,
Starting at the fan end.
There should be a bearing spacer (small collar), the fan hub, maybe some shims, the fan, the big waved washer and the 36mm nut.
The shims if used are supposed to space the fan away from the backing plate. I've seen 1.6 to 1.8mm in one manual and 2mm in another as the gap.
At the front (pulley end).
Another bearing spacer, the rear pulley half, some shims, front pulley half, more shims (8 total for a good start!), cup and nut.

Is it all there?

2 shims between the pulley halves generally makes for a tight belt, and 6 or more should go under the cup.

Don't use a washer!!! The shims are cheap and provide gradual adjustment......

Ctefeh