need to know how to adjust sc252 pulley PLEASE HELP

[Ckc189]

My sc252 pulley that hooks to the belt coming from the engine is sliding out and scraping against the outer casing on the covering plate. The pulley that is sliding has a purple arrow on it in the picture and is sliding in the direction of the arrow. My problem is that I do not know how to get this pulley back in maybe a half inch or so, so that it will not rub.

Thanks very much for any help! Me and my partner are new at this and are trying to fix it ourselves to save some money.

 

[OLD MAN GRINDER]

If the pulley is sliding, could be a broken key between pulley and shaft,,,,if the shaft and pulley are sliding then
the set screws on your bearings to shaft are not tight....

Bob.....

 

[Ckc189]

I can not get neither the pulley nor shaft and pulley to move in...I have tried everything I know of. And I don't know how it is sliding out, all I know is it was not rubbing initailly and now it is rubbing

 

[stumper63]

Take tension off belt by loosening four engine mount bolts and backing off the tension bolt. Remove sheave (pulley) by removing the two bolts. Then insert those two bolts into the empty threaded holes at 90 deg to where they came out of. Tighten til snug, then tighten each one approx 1/2 turn at a time and the sheave will magically slide off the hub. Check to make sure key is not sheared and re-install by putting the bolts back where they came from, align the sheave on the shaft where you want it, then tighten each bolt about 1/2 turn at a time until you reach about 110 "inch" pounds, not "ft. lbs or you'll strip them out for sure. Tighten belt and you're done.
Stumper63

 

[CalTreeEquip]

It may be that when the shaft slipped it got grooved by the set screws and is now jammed. It may be so bad that you have to cut the bearing off the make it right. I usually replace the jack shaft along with the bearings.

 

[CalTreeEquip]

Take tension off belt by loosening four engine mount bolts and backing off the tension bolt. Remove sheave (pulley) by removing the two bolts. Then insert those two bolts into the empty threaded holes at 90 deg to where they came out of. Tighten til snug, then tighten each one approx 1/2 turn at a time and the sheave will magically slide off the hub. Check to make sure key is not sheared and re-install by putting the bolts back where they came from, align the sheave on the shaft where you want it, then tighten each bolt about 1/2 turn at a time until you reach about 110 "inch" pounds, not "ft. lbs or you'll strip them out for sure. Tighten belt and you're done.
Stumper63

I would just like to add, make sure the bolts you use a grade 8, otherwise they will break. I have found units with grade 5 or 3 bolts in them.

 

[2treeornot2tree]

I would just like to add, make sure the bolts you use a grade 8, otherwise they will break. I have found units with grade 5 or 3 bolts in them.

And I would like to add to make sure you run a tap in any of the threads that are rusty. I don't know how many bolts I broke off before they were tight on equipment because of rust in the threads

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[Ckc189]

Ok I finally got eveything loose after breaking two grade 8 bolts in the process....Now I think I figured out what happened, the set screw somehow vibrated out and so the pulley was only being held on by it actually scrubbing against the casing.

Is there a standard size set screw or how do I figure out what size fits in it?

 

[2treeornot2tree]

Take it to the hardware store with you and find the one that fits or just buy a couple different sizes that are close. They are cheap. Or call the manufacturer and ask them

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[CalTreeEquip]

Check you manual, parts break down. They sometimes give the bolt sizes.