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A/C belt [message #214072]

Thu, 11 July 2013 17:58

Dennis sch

Messages: 58
Registered: July 2012
Location: United States

Karma: 1

Member

Does any one know what size the ac belt is on a 455 my ac belt shredded the other day and I didn't wright down the part # bummer

Dennis S Panama City FL 73 260

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Re: A/C belt [message #214077 is a reply to message #214072]

Thu, 11 July 2013 18:58

bwevers

Messages: 597
Registered: October 2010
Location: San Jose

Karma: 5

Senior Member

I found that the slightly shorter (61.5" x 7/16)belt works better, but
it's hard to put on.

I copied this from my notes.
I couldn't find it on Gene Fischer's web.
A/C Drive Belt
old(NAPA 25-15733); NBH 257612 (13/32” X 61.58”) ; PBH 15612 (3/8” x 61.625”)
GM (7/16"??? X62") 9433776
Gates 7619 or 7612 or 15615?
Dayco 15620 (15/32” X 62.0”)
Kragen 7612
Goodyear 15621 (should be ~ 11mm or 7/16”)

Bill Wevers GMC49ers, GMC Western States 1975 Glenbrook - Manny Powerdrive, OneTon 455 F Block, G heads San Jose

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Re: A/C belt [message #214084 is a reply to message #214072]

Thu, 11 July 2013 20:42

A Hamilto

Messages: 4508
Registered: April 2011

Karma: 39

Senior Member

Dennis sch wrote on Thu, 11 July 2013 17:58

Does any one know what size the ac belt is on a 455 my ac belt shredded the other day and I didn't wright down the part # bummer

A forum search says:

Goodyear gatorback 15574 - Alternator
Goodyear gatorback 15621 - Air Conditioner

Don't shoot the messenger if they don't work.

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Re: A/C belt [message #214094 is a reply to message #214072]

Thu, 11 July 2013 22:12

John Biwersi

Messages: 78
Registered: July 2006
Location: Maplewood,

Karma: 1

Member

I found that a Goodyear gatorback #15621 ((7/16" X61.5" ) fit the best for me on my 455 with original A6 compressor. I had no problem installing and it provided ample space such that the wire bundle that goes over the top of the compressor doesn't get pressed to the under side of the cockpit floor. This belt could be hard to find but you might get lucky with Ebay. I believe the Gatorback design provides better "gripping" such that you don't need as much belt tension which reduces the load on alternator and AC compressor bearings.

John B

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Re: [GMCnet] A/C belt [message #214105 is a reply to message #214077]

Fri, 12 July 2013 04:14

Mr ERFisher

Messages: 7117
Registered: August 2005

Karma: 2

Senior Member

> I couldn't find it on Gene Fischer's web.
> A/C Drive Belt
>

bite your tongue
http://gmcmotorhome.info/BELTS.html

go here
http://gmcmotorhome.info/list.html
hit
ctrl-f
type "belts"
and you get the link
http://gmcmotorhome.info/BELTS.html

check them with a 10mm wrench
and make it hell-for tight (and this tells you how)

http://www.gmcmhphotos.com/photos/data/5950/GMC_BELTS_WILL_NOT_LET_YOU_DOWN.pdf

gene

> old(NAPA 25-15733); NBH 257612 (13/32” X 61.58”) ; PBH 15612
> (3/8” x 61.625”)
> GM (7/16"??? X62") 9433776
> Gates 7619 or 7612 or 15615?
> Dayco 15620 (15/32” X 62.0”)
> Kragen 7612
> Goodyear 15621 (should be ~ 11mm or 7/16”)
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>

--
Gene Fisher -- 74-23,77PB/ore/ca
�Give a man a fish; you have fed him for today --- give him a URL and
-------
http://gmcmotorhome.info/
Alternator Protection Cable
http://gmcmotorhome.info/APC.html
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