Set screw will not hold key way and pulley flies off

by Jeffery a Leighton
(North Conway NH )

the pulley on engine does not stay on the set screw will not hold key way and pulley flies off

we have a new tat-2t wheel barrel compressor

the pulley on engine that drives compressor keep coming off the set screw loosens and keyway falls out the pulley fall off

it has done this since day one when we unwrapped

now need new pulley set screw and keyway very unhappy with this what the problem with these compressors

Comments for Set screw will not hold key way and pulley flies off

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Dec 13, 2016
Set screw / key / bolt & washer
by: Doug in

There's a lot of vibration, I imagine..

I do not know what is supposed to be on there, but I'd definitely add the bolt and washer as a safety item, if nothing else.

And on the set screw - if it is coming loose, maybe a dab of locktite or similar.

You don't say if you got a manual, but there's some potentially useful info here:

note page 25.

Dec 13, 2016
by: Anonymous

By key way I mean there is a slot in the compressor shaft, and the wheel the belt runs in, that requires a piece of @ 1/4" bar stock to join the shaft to the wheel.

The wheel does have a set screw that must come loose because I did tighten it. I will do the alignment and tensioning procedure.

I agree that is the ultimate reason the wheel "chases" off the shaft. If aligned properly it should stay on there.

The other question I had is if there is supposed to be a bolt and washer on the end of the shaft? That would keep the wheel on.

Then, if not properly aligned, there would be belt wear, possible belt failure or the belt might "chase" off the wheel.

Is there supposed to be a bolt on the end of that shaft or am I missing something?

Dec 12, 2016
Set screw
by: Doug in

If you haven't already, yes contact Titan -

info is here:

They may have the dimensions of what you need, which likely is available at a local hardware store - if not the exact thing, then something close enough.

Good luck, and please let us know how get on with this...

Dec 11, 2016
Pulley flies off
by: Tom

My compressor pulley flies off. Not the engine pulley. It could ultimately be an alignment issue. I will look a that now that I know what to do. However, the engine shaft has a bolt and washer that goes into the end of the shaft that seems would keep the pulley from coming off. There is a threaded hole in the compressor shaft for a bolt also. I need that bolt and can't find a parts diagram to order from. I need that bolt and washer. I'll get a new belt and then go thru the alignment process. Do I contact the factory for those parts or is there somewhere else?

Feb 14, 2015
by: Doug in

Too late to send/take it back?

Is the motor shaft OK?

What, exactly, do you mean by "keyway"? Is there a key plus a set screw?

Sounds like you may have an alignment problem - even if the pulley gets loose, it should stay in place by tension on the belt.

Pix would be nice, too.

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