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Old 06-07-2011, 02:39 PM   #1
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Dash AC belt squealing

I have a 30 ft 1994 Fleetwood Flair with a 454. VIN #1GBKP37NXR3304833. I run thru A/C belts like crazy. I am wondering if I am getting the wrong size from the parts store. Once installed there is next to no additional adjustment available so once it runs for a few hours it starts to slip. Does anyone know the correct size to use on this motor? Parts stores tell me to use #15605 and Napa says #7603...both are too big and slip soon after installation. Workhorse gave me a # of 1403, but I am unable to cross that number to find out the size and I dont want to order a belt that I have probably already tried. Also, its a 94 which I believe is pre-workhourse. Any help in finding me the correct size belts would be wonderful. Thank you.

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Old 06-07-2011, 02:52 PM   #2
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A 7603 is 60.3" long
Try a 7600 that is 60" long
Or a 7595 59.7" long

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Old 06-07-2011, 03:29 PM   #3
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a/c belts scream '94 P37 454ci Fleetwood Flair

Thank you for your speedy reply.
I have previously tried an arm load of belts from NAPA without any luck. I was really hoping to find someone with the same set up and see what has worked for them. Also, there are two grooves on the a/c pulley and was wondering what size the other belt was. One belt is long and goes around all the pulleys and the other just goes between the p/s pump and a/c comp.. When we bouught the rv it only had the one long belt and it was screaming. I have gone through at least half a dozen belts of different sizes and I'm tired of replacing them. Any ideas on how to solve this issue or can you point me to someone who may have had this issue and knows what belts to use. Any help would be greatly appreciated. Thanks again for your time and advice.
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Old 06-10-2011, 06:22 PM   #4
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Most "V" belts require a re-tension after break-in. If you hit the end of the adjustment on your tensioner then you have a routing or length issue. That being said, don't overlook the internal pressures in the A/C, as too high a pressure can cause compressor lock up; possible faulty high pressure switch, or a blockage some where in the freon system. If there was one belt driving all the accessories, to begin with, groove alignment of the belts may be the problem. Is there any sideways deflection of the belt when installed ? If the P/S pump drives off the A/C comp. does the P/S work OK until the belt starts to slip. 2 grooves on the A/C may not be an indicator that the P/S is suppost to be driven from there. Is the P/S pump slide mounted for adjustment ? Is there an empty groove on the crank pully ? I don't know if looking at a 94 GM truck manual for routing would be any help, but it might be a place to start.
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