Humvee Generator Pulley

[Hummer Guy]

Has anyone ever taken the pulley off the 200Amp generator? I try to use a breaker bar and a big crescent wrench to take it off but this thing is literally just frozen. Has anyone else ever taken this pulley off?

What I was trying, was putting my breaker bar in the back and then try to use my crescent on the front to loosen it

 

[Mogman]

I have always used an impact wrench, I have never messed with the clutch type though

 

[Hummer Guy]

I have always used an impact wrench, I have never messed with the clutch type though

That's what I was thinking

 

[Maxjeep1]

That's what I was thinking

It has the procedure in the TM. I was trying to get mine off also. I was able to get the one nut off but I couldn’t get the smaller one off. It shows to clamp the pulley in a vise and I didn’t want to remove the beast. My pulley was not the issue and I’m glad I didn’t remove it.

 

[Retiredwarhorses]

Why are you removing it? And which pulley are you referring too? There are 2

 

[Hummer Guy]

Why are you removing it? And which pulley are you referring too? There are 2

This not my generator but its similar, its the 8 groove pulley. My generator wasn't making any power and was making a really loud sound as if something inside is broken. I bought a new generator but it didn't come with any pulley so I'm trying to take the pulley off the old one and install it on my new generator

 

[nikojo]

This not my generator but its similar, its the 8 groove pulley. My generator wasn't making any power and was making a really loud sound as if something inside is broken. I bought a new generator but it didn't come with any pulley so I'm trying to take the pulley off the old one and install it on my new generator

Why not use a pulley puller??

 

[Hummer Guy]

Why not use a pulley puller??

Don't have one at the moment, but I decided to just buy another pulley since I found one for $33

 

[86humv]

Don't have one at the moment, but I decided to just buy another pulley since I found one for $33

I almost guaranty the $33 one is not the one you need, unless the guy selling it does not know what he has.

 

[86humv]

I looked up the $33 pully...Its for an early surp 100 amp alternator......belt won't line up.
600634 is what you need...look it up at macmotors...$$$$$

 

[Hummer Guy]

I looked up the $33 pully...Its for an early surp 100 amp alternator......belt won't line up.
600634 is what you need...look it up at macmotors...$$$$$

Okay, thank you, I will look it up

This is the one I bought https://www.ebay.com/itm/271609044907

 

[Retiredwarhorses]

That pulley is wrong, you must use the clutch pulley on 200 and 400’s with late style serpentine setup.

 

[Hummer Guy]

That pulley is wrong, you must use the clutch pulley on 200 and 400’s with late style serpentine setup.

Yea, I see now, I found one of the pulleys for $226, I think I'm better off just getting an air impact and taking the old one off of mines or bringing it to a shop to have them take it off

 

[Retiredwarhorses]

The nut comes off with an impact driver, the pulley will either come right off or will get destroyed trying, ive done about 100 of them, most common in the pulley will separate from the bearing, leaving just the bearing still stuck on the gen shaft, if the clutch action is seized, just buy a new clutch pulley

 

[rossbart]

I have an M1123 with s# below 196900. It has the dual voltage 200 amp Niehoff alternator. But, does not have the overrun clutch pulley. So, it chirps the serpentine belt when you kill the truck. And, just discovered I have one of the mounting bracket bolts broken off in the head (#13 on diagram). Don’t know if that stress contributed
My question: does anyone know if I can upgrade the fixed pulley I have for an overrun clutched pulley? Part number If so, would it be the one I’m seeing listed for the M1114s? Be a good time to upgrade while I may have the alternator off.
Thanks for any help yall can give.

 

[Retiredwarhorses]

I have an M1123 with s# below 196900. It has the dual voltage 200 amp Niehoff alternator. But, does not have the overrun clutch pulley. So, it chirps the serpentine belt when you kill the truck. And, just discovered I have one of the mounting bracket bolts broken off in the head (#13 on diagram). Don’t know if that stress contributed
My question: does anyone know if I can upgrade the fixed pulley I have for an overrun clutched pulley? Part number If so, would it be the one I’m seeing listed for the M1114s? Be a good time to upgrade while I may have the alternator off.
Thanks for any help yall can give.

No, you have what’s known as a “pre-litens” pulley system,You would need to convert the entire system to “Litens” serp system as all the new trucks are.
This includes PS pump, reservoir, hoses, mounts etc…

 

[Coug]

For the sheared off mounting stud on the head, I had that issue and ended up changing to the newer style rear support bracket.

Sheared generator bracket bolts.

When I first got the truck(m1123, 200 amp generator) the stud on the exhaust that holds the rear generator bracket was sheared, and a couple of the front bolts were loose. It started making noise again, so I checked, and the exhaust stud is sheared again, and at least one of the front bracket...

steelsoldiers.com

 

[rossbart]

No, you have what’s known as a “pre-litens” pulley system,You would need to convert the entire system to “Litens” serp system as all the new trucks are.
This includes PS pump, reservoir, hoses, mounts etc…

Thank you so much for the info. Sounds like I’m stuck with the fixed pulley I guess.
I did see where Coug directed me to another thread and suggested upgrading the rear support to the later version which is, apparently, heavier duty and bolts direct to the block as opposed to exhaust stud. (#4 in diagram). I have ordered that and will plan to make that upgrade.
Is there anything else that can, or should be, done to cope with the fixed pulley situation in my application?
Thanks for y’all’s help…