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Joined: Apr 2008
Posts: 27
T
Apprentice
Apprentice
T Offline
Joined: Apr 2008
Posts: 27
I am having difficulty keeping the belt tight on the generator. I have a regular 1/2 inch bolt about an 1 and 1/4 inches long that goes throught the arm attached at the water pump and screws into the hole on the generator. I have tigheted it down as hard as I can. Also the mounting bolts to the generator are as tight as I can get but it keeps slipping and the truck overheats.
Is there a special bolt that goes through the arm and into the generator? Should there be a washer or something between the two?
Thanks

Joined: May 2006
Posts: 8,351
L
'Bolter
'Bolter
L Offline
Joined: May 2006
Posts: 8,351
Try a star type lock washer http://www.fastenal.com/web/products/detail.ex?sku=1133741
This type will bite into the rm and help lock it down better


Bill Burmeister
Joined: May 2005
Posts: 8,878
G
.
.
G Offline
Joined: May 2005
Posts: 8,878
Be sure your belt pulleys are in good shape, if they are worn into some shape other than a clean "V", then the belt is likely to slip.
At one time I had a bad generator pulley on my truck, worked fine other then the belt slipping....

Grigg


•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
---All pictures---
"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-
Joined: Oct 2001
Posts: 3,458
4
Extreme Gabster
Extreme Gabster
4 Offline
Joined: Oct 2001
Posts: 3,458
Also make sure your pulleys aren't out of round- if they keep tightening and loosening the belt the bolt will slip and then the bearings will fry. You shouldn't need very much tension.


Paint & Body Shop moderator
A lone amateur built the Ark. A large group of professionals built the Titanic.
Joined: Oct 2006
Posts: 4,983
B
Master Gabster
Master Gabster
B Offline
Joined: Oct 2006
Posts: 4,983
Try using some "Locktite".


~Jim
Joined: May 2005
Posts: 8,878
G
.
.
G Offline
Joined: May 2005
Posts: 8,878
I think there is more going on than just the belt tensioner arm or bolt loosening and slipping.

I have never had a problem keeping that tight on any of my engines/vehicles, and I never over tighten them, they stay put with normal efforts.

An example of how easy it is if the rest of the system is in decent shape:
Friend of mine had a model A ford car, I commented that his fan belt was loose, when I poked it the whole generator moved, not tight at all... He said , "It's OK, the weight of the generator keeps the belt tight enough" And it did, it was summer time and he drove the car all over the place, including over the mountain between my place and his, and even going slow off road on the 4 wheeler trails. It never overheated and the battery stayed charged.

I'm not saying you should leave the generator/belt slack, only that this is a simple thing, and that part of the system is likely not the real problem. Something else must be going on to complicate and confuse things.

Grigg


•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
---All pictures---
"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-

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