Noise from generator pulley?? Free spins on shutdown.

[nikojo]

I'm posting link to video.

HMMWV Generator Pulley Noise

On start up no noise. Generator pulley spins and generator charges batteries fine.

On shutdown it makes noise and inner part of pulley/nut free spins for a few seconds and then stops.

This can't be normal?!?! How do I fix this??

 

[Mogman]

It has a sprag clutch in it to keep the torque from the spinning alt from causing the belt to squeal when the engine suddenly stops, sounds like it needs some lubrication.
Otherwise yes that is normal for that type of pulley, not all alternators have that type of pulley.

 

[Mogman]

You also need to replace that fuel line on the fan clutch (and any others in the power steering system), fuel hose does not have the temperature/pressure rating for that job, you should be using power steering return line, saving money here is not a good idea.

 

[nikojo]

You also need to replace that fuel line on the fan clutch (and any others in the power steering system), fuel hose does not have the temperature/pressure rating for that job, you should be using power steering return line, saving money here is not a good idea.

Wow. Thanks for picking up on that. I'm going through the truck bits at a time. Didn't pick up on that and it explains a leak I noticed coming from connection at fan shroud.

Has anyone used AN connectors at these locations? Or is worm gear clamp adequate??

 

[nikojo]

Why does the pulley has what looks to be two nuts on it.........an inner one and outer one........one is painted red??

 

[Mogman]

Seems worm clamps are good enough, the hose on the inside of the fan shroud uses AN fittings (is not 3/8 hose ether)
Not sure about the nuts, consulting the TM should give an answer, others may also have the answer.

 

[papakb]

I installed hoses with AN fittings on them on all of my fan clutch lines and will never go back to hose clamped lines again. There's a very valid reason they use them on aircraft and those same reasons apply to vehicles. The reason manufacturers don't use them is for cost savings but it's cheap insurance when you think about it.

 

[nikojo]

I installed hoses with AN fittings on them on all of my fan clutch lines and will never go back to hose clamped lines again. There's a very valid reason they use them on aircraft and those same reasons apply to vehicles. The reason manufacturers don't use them is for cost savings but it's cheap insurance when you think about it.

You wouldn't happen to know the fittings you used, ie sizes?

 

[Retiredwarhorses]

You wouldn't happen to know the fittings you used, ie sizes?

look in the TM, the ECV and A2’s all used compression fittings, not sure why yours still has old m998 setup that is secured via hose clamps,

 

[nikojo]

look in the TM, the ECV and A2’s all used compression fittings, not sure why yours still has old m998 setup that is secured via hose clamps,

Good question. Mine is a bit hybrid. Chassis is 1994 but drivetrain is A2.

Will look at TM and try to cobble parts together.

 

[Retiredwarhorses]

Good question. Mine is a bit hybrid. Chassis is 1994 but drivetrain is A2.

Will look at TM and try to cobble parts together.

was it a conversion by private party?

 

[nikojo]

was it a conversion by private party?

Yes. And had I know what I know now I would have had you do it lol!

I’m happy overall right now but lots of things done poorly and have been slowly going through it. In the end paying for it again. For anyone reading this getting it done right.

 

[nikojo]

was it a conversion by private party?

Steven what are your thoughts on the noise? Just lubricate at interface?

Is it possible it’s too tight or too loose?

Don’t understand how that goes together as the TMs I’m looking at show simple single but and key.

 

[Retiredwarhorses]

Steven what are your thoughts on the noise? Just lubricate at interface?

Is it possible it’s too tight or too loose?

Don’t understand how that goes together as the TMs I’m looking at show simple single but and key.

the noise is normal and it’s working as designed

 

[Retiredwarhorses]

Yes. And had I know what I know now I would have had you do it lol!

I’m happy overall right now but lots of things done poorly and have been slowly going through it. In the end paying for it again. For anyone reading this getting it done right.

so you have a converted M998A1…that makes sense now.
You need A2 and above TM’s

 

[nikojo]

I've tried oiling/greasing the bearing/clutch but can't make it go quiet.

If everyone says this noise is normal than so be it but it makes me anxious everytime as I associate this with a bad bearing or something borken.

I was able to switch out the line and it was perfect. No more leak and much more secure.

 

[86humv]

I've tried oiling/greasing the bearing/clutch but can't make it go quiet.

If everyone says this noise is normal than so be it but it makes me anxious everytime as I associate this with a bad bearing or something borken.

I was able to switch out the line and it was perfect. No more leak and much more secure.

You were told Jan 9th that its normal.
Also...if bearing ever froze up...it would be a non-clutch pully and still work like the early non-clutch ones..