200 Amp Alternator nut keeps falling off?

[Pstyckiewicz]

I keep having this reoccurring problem of my alternator pulley nut falling off. Not sure if anyone has the same problem. I put it on tight this time with some lock tight. See if it works

 

[FlameRed]

No, has not fell off yet. But I always use a impact gun for nuts on a shaft that rotates.

 

[TOBASH]

Red or blue loctite???

 

[Pstyckiewicz]

I put red on there.

 

[Pstyckiewicz]

Not sure if there is any kind of lock washer or something that I’m missing. I only put on the large flange bolt on.

 

[FlameRed]

Not sure if there is any kind of lock washer or something that I’m missing. I only put on the large flange bolt on.

 

[Pstyckiewicz]

Than you for the picture. It is not the Vbelt style pulley. It has the belt style. And the nut is a large flange type.

 

[MarkM]

Is there room for a second nut and jam the two nuts together?

Mark

 

[Pstyckiewicz]

That is a good idea! I think there is. I will be looking into this idea.

 

[Mogman]

Are you sure the key is not missing or sheared off?

 

[Pstyckiewicz]

I will have to take a look. I could see how that would cause the nut to loosen up.

 

[Awol]

Time to bust out the welder. That sob won't come off ever again.

 

[87cr250r]

If you go with the jam but you need to install a thing nut first and then a thicker nut. Two nuts of the same width offer no additional locking.

The only effective lock washer is the wedge lock style.

Adding spacers to increase grip length helps.

Are you using a torque wrench?

 

[Pstyckiewicz]

No torque wrench. Just tightening it down as hard as I can.

 

[Mogman]

Pictures would help.

 

[Pstyckiewicz]

I’ll take some pictures when I get out of work.

 

[Pstyckiewicz]

The nut is still tight. I did notice that the nut/alternator spin freely in one direction. When I try to spin in the other it does not.

Not sure if that is how it is supposed to work?

 

[Pstyckiewicz]

Also belt does not move when turning.

 

[Mogman]

The nut is still tight. I did notice that the nut/alternator spin freely in one direction. When I try to spin in the other it does not.

Not sure if that is how it is supposed to work?

Yes that is how it works

 

[Pstyckiewicz]

Thank you!