| Stock Fan belt configuration [message #230571] |
Wed, 20 November 2013 21:21  |
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Richard Andis
Messages: 261
Registered: January 2013
Location: HELL Paso, TX
Karma: 0
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Just got back from a 5 day excursion with a fellow GMCer to Big Bend National Park. Trip report and pictures soon to follow.
On the return trip we had a sudden loss of power and we ended up limping into a State Park for the night. I shut down the engine while I was checking in and when I tried to restart I got nothing, not even a click. Flipped the boost switch and she fired right up.
Upon checking the engine bay I discovered several drive belts had gone the way of the Dodo. The belt driving the AC compress was hanging behind the water pump pulley and the alternator belt was altogether missing. Apparently the loss of power was from the depleted battery that was no longer charging.
We settled in for the night and plugged in to shore power so the engine battery would recharge. Looked into my spares and I didn't have a extra alternator belt.
Gave a call to Jim K the following morning to get the part number so I could try and locate some belts locally. He was surprised that I didn't have overheating problems as the belt that drive the AC compressor also drives the water pump.
Took another look in the engine bay and confirmed that the one existing belt was driving both the steering pump AND the water pump. Is this the correct configuration? I might note that both the main pulley AND waterpump pulley has 3 drive channels. Again, is this a stock setup?
BTW,... almost got home (200 mile) on the just main battery. About 10 miles from home discovered turn signals didn't want to work so I flipped the boost switch. Got home with no further issues.
Valhalla - 1978 GMC Royale rear twin [SOLD]
Walküre - 1974 VW Thing (Toad)
[Updated on: Wed, 20 November 2013 21:24] Report message to a moderator |
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| Re: Stock Fan belt configuration [message #230573 is a reply to message #230571] |
Wed, 20 November 2013 21:36  |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
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Senior Member |
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| Richard Andis wrote on Wed, 20 November 2013 20:21 |
Just got back from a 5 day excursion with a fellow GMCer to Big Bend National Park. Trip report and pictures soon to follow.
On the return trip we had a sudden loss of power and we ended up limping into a State Park for the night. I shut down the engine while I was checking in and when I tried to restart I got nothing, not even a click. Flipped the boost switch and she fired right up.
Upon checking the engine bay I discovered several drive belts had gone the way of the Dodo. The belt driving the AC compress was hanging behind the water pump pulley and the alternator belt was altogether missing. Apparently the loss of power was from the depleted battery that was no longer charging.
We settled in for the night and plugged in to shore power so the engine battery would recharge. Looked into my spares and I didn't have a extra alternator belt.
Gave a call to Jim K the following morning to get the part number so I could try and locate some belts locally. He was surprised that I didn't have overheating problems as the belt that drive the AC compressor also drives the water pump.
Took another look in the engine bay and confirmed that the one existing belt was driving both the steering pump AND the water pump. Is this the correct configuration? I might note that both the main pulley AND waterpump pulley has 3 drive channels. Again, is this a stock setup?
BTW,... almost got home (200 mile) on the just main battery. About 10 miles from home discovered turn signals didn't want to work so I flipped the boost switch. Got home with no further issues.
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Sounds like the standard setup. That boost switch is a life saver isn't it?
Bob de Kruyff
78 Eleganza
Chandler, AZ
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| Re: Stock Fan belt configuration [message #230579 is a reply to message #230573] |
Wed, 20 November 2013 22:06 |
jim kanomata
Messages: 257
Registered: March 2007
Location: fremont,ca
Karma: 12
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Sorry, I am getting old faster than I thought.
Yes the PS belt is connected to the crank and water pump.
I spent all afternoon few years ago trying to start my Cad 540.
Finally that evening It occurred to me that I had wired the firing sequence of an Oldsmobile.
Jim Kanomata
Applied/GMC, Fremont,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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| Re: [GMCnet] Stock Fan belt configuration [message #230628 is a reply to message #230571] |
Thu, 21 November 2013 07:49 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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That's the stock setup. The three sheave pulley, I was once told, is common only to the motorhome. Perhaps someone with a Toronado also will chime in, I've not seen its belt setup.
--johnny
From: Richard Andis <randis2@elp.rr.com>
To: gmclist@temp.gmcnet.org
Sent: Wednesday, November 20, 2013 10:21 PM
Subject: [GMCnet] Stock Fan belt configuration
Just got back from a 5 day excursion with a fellow GMCer to Big Bend National Park. Trip report and pictures soon to follow.
On the return trip we had a sudden loss of power and we ended up limping into a State Park for the night. I shut down the engine while I was checking in and when I tried to restart I got nothing, not even a click. Flipped the boost switch and she fired right up.
Upon checking the engine bay I discovered several drive belts had gone the way of the Dodo. The belt driving the AC compress was hanging behind the water pump pulley and the alternator belt was altogether missing. Apparently the loss of power was from the depleted battery that was no longer charging.
We settled in for the night and plugged in to shore power so the engine battery would recharge. Looked into my spares and I didn't have a extra alternator belt.
Gave a call to Jim K the following morning to get the part number so I could try and locate some belts locally. He was surprised that I didn't have overheating problems as the belt that drive the AC compressor also drives the water pump.
Took another look in the engine bay and confirmed that the one existing belt was driving both the steering pump AND the water pump. Is this the correct configuration? I might note that both the main pulley AND waterpump pulley has 3 drive channels. Again, is this a stock setup?
--
"Vahalla" - 1978 GMC Royale (Rear Twin)
"Walküre" - 1974 VW Thing
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Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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| Re: [GMCnet] Stock Fan belt configuration [message #230664 is a reply to message #230571] |
Thu, 21 November 2013 11:02 |
scott cowden
Messages: 170
Registered: February 2004
Karma: 0
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Senior Member |
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To answer your question, stock config is that all three belts pass over the crank pulley and water pump.
I have a bit of an odd idea for you.
I've never gotten a lot of longevity from the stock automotive belt for the alternator.
In 2005, I installed an equipment belt on my alternator and it lasted until last year, when it started to go south -7 years and 30k miles after install. at the time, I was on the road and got an automotive belt.
That belt lasted less than a year.
I went to the local tractor repair place [farm tractors, that is] and got another belt. they call them 'implement' belts.
Implement belts will handle 20+ hp and are used for heavy duty mowers and such. They have a more robust cross section. I bought a 57 inch belt but couldn't quite get it to fit as it sits a bit more proud in the pulley's and had to go back and get a 58 inch. It snugged up well at about the half way point in the alternator adjustor travel.
As a comparison, automotive V belts are generally rated for between 5 and 10 HP loads.
Drove the coach about 1,500 miles in the past month with the heavier belt without so much as a peep.
So, my suggestion
Stock auto belt from the GMCMI book : 15/32" wide belt, 57 inches long, part 15-5770
Farm Implement belt that works great: 1/2" wide belt, 58 inches long.
JWID
Good luck
Scott Cowden
> To: gmclist@temp.gmcnet.org
> From: randis2@elp.rr.com
> Date: Wed, 20 Nov 2013 21:21:26 -0600
> Subject: [GMCnet] Stock Fan belt configuration
>
>
>
>
> Just got back from a 5 day excursion with a fellow GMCer to Big Bend National Park. Trip report and pictures soon to follow.
>
> On the return trip we had a sudden loss of power and we ended up limping into a State Park for the night. I shut down the engine while I was checking in and when I tried to restart I got nothing, not even a click. Flipped the boost switch and she fired right up.
>
> Upon checking the engine bay I discovered several drive belts had gone the way of the Dodo. The belt driving the AC compress was hanging behind the water pump pulley and the alternator belt was altogether missing. Apparently the loss of power was from the depleted battery that was no longer charging.
>
> We settled in for the night and plugged in to shore power so the engine battery would recharge. Looked into my spares and I didn't have a extra alternator belt.
>
> Gave a call to Jim K the following morning to get the part number so I could try and locate some belts locally. He was surprised that I didn't have overheating problems as the belt that drive the AC compressor also drives the water pump.
>
> Took another look in the engine bay and confirmed that the one existing belt was driving both the steering pump AND the water pump. Is this the correct configuration? I might note that both the main pulley AND waterpump pulley has 3 drive channels. Again, is this a stock setup?
>
>
> --
> "Vahalla" - 1978 GMC Royale (Rear Twin)
> "Walküre" - 1974 VW Thing
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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