floating sheave

the torch · Post by **the torch** » Mon Mar 23, 2015 8:38 pm

My floating sheave seems to wobble and rattle.
Is a bushing worn out or a bearing shot?
May need to replace the belt, bought the machine new in 71`
About 20 years ago I did take the, snap,ring washer, and spring off.
That was a pain to replace

charlese · Post by **charlese** » Mon Mar 23, 2015 8:44 pm

If you haven't replaced a drive belt since 1971 - It's time!!!!!

JPG · Post by **JPG** » Tue Mar 24, 2015 1:26 am

Wobble and rattle is likely caused by a worn keyway in the floating sheave.

the torch · Post by **the torch** » Tue Mar 24, 2015 12:31 pm

When I had the snap ring and spring off I did change both belts.
That is so long ago that I don`t remember the configuration on the shaft.
I also need to know the best way to compress the spring to get the washer
and snap ring back on.

beeg · Post by **beeg** » Tue Mar 24, 2015 1:05 pm

the torch wrote:I also need to know the best way to compress the spring to get the washer
and snap ring back on.

Try this method, it worked for me.

the torch · Post by **the torch** » Sat Mar 28, 2015 6:49 pm

I ordered a floating sheave, long key, spacer. and belt.
IS the long key held in place by a set screw?
I also built a board with a hole that fits over the shaft.
The snap ring WILL go through the hole but the washer and spring do not.
beeg suggested the board method, it seams to do the job. [did a small test]

JPG · Post by **JPG** » Sat Mar 28, 2015 8:58 pm

the torch wrote:I ordered a floating sheave, long key, spacer. and belt.
IS the long key held in place by a set screw?
I also built a board with a hole that fits over the shaft.
The snap ring WILL go through the hole but the washer and spring do not.
beeg suggested the board method, it seams to do the job. [did a small test]

Yes. The key extends into the keyway in the FAN sheave hub and is secured by the fan sheave set screw. Really torque it!!! Blue locktite recommended(by me).

the torch · Post by **the torch** » Mon Mar 30, 2015 8:50 pm

I can`t even get an allen wrench between the sheave and the end cap on the motor. Do I need to split the motor to get at the set screw? I checked between the splines on the sheave to see if the set screw was hiding. It`s not there.

charlese · Post by **charlese** » Mon Mar 30, 2015 9:51 pm

I don't remember a set screw at all when I took out and replaced the key. Is the set screw only on older (or Newer) models?

Mine was from 1999 if my memory is accurate.

JPG · Post by **JPG** » Mon Mar 30, 2015 10:38 pm

the torch wrote:I can`t even get an allen wrench between the sheave and the end cap on the motor. Do I need to split the motor to get at the set screw? I checked between the splines on the sheave to see if the set screw was hiding. It`s not there.

There is a hole in the bottom of the motor pan that provides access to that set screw on the hub of the fan sheave.

The fan sheave butts up against the spacer. The key extends into the keyway of the fan sheave. The setscrew secures both the key and the sheave to the motor shaft.

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