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| [GMCnet] Alternator belts [message #146721] |
Sun, 16 October 2011 18:30  |
emerystora
Messages: 4442
Registered: January 2004
Karma: 13
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On my last trip to Goshen to the GMCMI convention and then to Michigan for a couple of weeks, I threw an alternator fan belt on the way back to Santa Fe.
I had a hard time finding a replacement that was larger than 10 mm. Goodyear, Gates, and Kelly Springfield have all changed their 11 mm (7/16") belts to 10 mm without changing the part numbers.
I had success in the past buying at Autozone - however this time their 57.5" belt was labeled "15573, replaces Old 15573, 1.0 cm". This is clearly a 10 mm belt and a 10 mm open end wrench will fit over it. After stopping at 3 different Autozones I finally found one that had old stock labeled "15573, 11AV1455, 1.1 cm x 1.5 m". This is an 11 mm belt and works fine on the GMC.
One of the Autozones I stopped at had 15575 belts that say "replaces 15573". These also measured 10 mm.
So it looks like one of the last stores carrying 11 mm belts has now changed to 10 mm.
In the past I had reported that NAPA carries two llines of belts. NBH and PBH.
The NBH belts are made by Gates and are 10 mm. The 11mm belts all have the prefix PBH and have the following part numbers. They are made by a company named Cadna which is an OEM supplier to Hyundai, Kia and Mercedes Benz.
They are:
Air conditioner, 403 PBH 401-7603
Air conditioner, 455 PBH 401-7619
Alternator 403&455 PBH 401-7570
Water Pump & Power Steering 403 & 455 PBH 401-7450
Water Pump & Power Steering 403 & 455 (shorter) PBH 401-7445
HOWEVER, after getting home I went to my local NAPA to get a spare and they did not stock the PBH line. They looked it up in their catalog and it shows that it is also apparently now a 10 mm belt.
For the new owners, I want to point out that the 10 mm belts ride low in the GMC Motorhome pulleys and will slip and squeal. The 10 mm probably works fine for smaller engines but for the 403 and 455 engines used in GMC motorhomes there is just too much torque for the 10 mm belts to work properly.
Does anyone know of any supplier that would still have 11 mm belts other than old stock?
If not we may have to determine if we can get replacement pulleys in a 1/2" size that will fit our GMC Motorhomes and convert to 1/2" belts.
Emery Stora
77 Kingsley
Santa Fe, NM
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| Re: [GMCnet] Alternator belts [message #146725 is a reply to message #146721] |
Sun, 16 October 2011 18:44  |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
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Or switch to implement pullys which fit the different angle belts. Or bite the bullet and convert to a serpentine belt and be done with it.
--johnny
________________________________
From: Emery Stora <emerystora@mac.com>
To: gmclist@temp.gmcnet.org
Sent: Sunday, October 16, 2011 7:30 PM
Subject: [GMCnet] Alternator belts
On my last trip to Goshen to the GMCMI convention and then to Michigan for a couple of weeks, I threw an alternator fan belt on the way back to Santa Fe.
I had a hard time finding a replacement that was larger than 10 mm. Goodyear, Gates, and Kelly Springfield have all changed their 11 mm (7/16") belts to 10 mm without changing the part numbers.
I had success in the past buying at Autozone - however this time their 57.5" belt was labeled "15573, replaces Old 15573, 1.0 cm". This is clearly a 10 mm belt and a 10 mm open end wrench will fit over it. After stopping at 3 different Autozones I finally found one that had old stock labeled "15573, 11AV1455, 1.1 cm x 1.5 m". This is an 11 mm belt and works fine on the GMC.
One of the Autozones I stopped at had 15575 belts that say "replaces 15573". These also measured 10 mm.
So it looks like one of the last stores carrying 11 mm belts has now changed to 10 mm.
In the past I had reported that NAPA carries two llines of belts. NBH and PBH.
The NBH belts are made by Gates and are 10 mm. The 11mm belts all have the prefix PBH and have the following part numbers. They are made by a company named Cadna which is an OEM supplier to Hyundai, Kia and Mercedes Benz.
They are:
Air conditioner, 403 PBH 401-7603
Air conditioner, 455 PBH 401-7619
Alternator 403&455 PBH 401-7570
Water Pump & Power Steering 403 & 455 PBH 401-7450
Water Pump & Power Steering 403 & 455 (shorter) PBH 401-7445
HOWEVER, after getting home I went to my local NAPA to get a spare and they did not stock the PBH line. They looked it up in their catalog and it shows that it is also apparently now a 10 mm belt.
For the new owners, I want to point out that the 10 mm belts ride low in the GMC Motorhome pulleys and will slip and squeal. The 10 mm probably works fine for smaller engines but for the 403 and 455 engines used in GMC motorhomes there is just too much torque for the 10 mm belts to work properly.
Does anyone know of any supplier that would still have 11 mm belts other than old stock?
If not we may have to determine if we can get replacement pulleys in a 1/2" size that will fit our GMC Motorhomes and convert to 1/2" belts.
Emery Stora
77 Kingsley
Santa Fe, NM
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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] Alternator belts [message #146727 is a reply to message #146721] |
Sun, 16 October 2011 19:16 |
Kosier
Messages: 834
Registered: February 2008
Karma: 1
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Emery,
My answer to your problem would be to go to Advance Auto Parts
and buy a Dayco belt. BUT, leave that 10mm wrench at
home and learn the correct way to measure a Dayco belt. I had to
call their engineering staff to find this out.
Because of their raw, cut sidewall construction with a fabric
outer belt, it requires a different method. They had a lot of
warranty
claims on damaged belts, probably because v-belts are only used
on older, high mileage vehicles. Warn pulleys were causing
the upper corners of the belts to get torn up. The answer is to
use a machinist's protractor set to 38 degrees. Drop the belt in
it
and measure across the top of the belt. They had to clip the top
corners of the belts to keep worn pulleys from damaging the
belts. I tried it and found that he was correct. So, I'm only
using Dayco belts, now. YMMV
Gary Kosier
----- Original Message -----
From: "Emery Stora" <emerystora@mac.com>
To: <gmclist@temp.gmcnet.org>
Sent: Sunday, October 16, 2011 7:30 PM
Subject: [GMCnet] Alternator belts
> On my last trip to Goshen to the GMCMI convention and then to
> Michigan for a couple of weeks, I threw an alternator fan belt
> on the way back to Santa Fe.
> I had a hard time finding a replacement that was larger than 10
> mm. Goodyear, Gates, and Kelly Springfield have all changed
> their 11 mm (7/16") belts to 10 mm without changing the part
> numbers.
>
> I had success in the past buying at Autozone - however this
> time their 57.5" belt was labeled "15573, replaces Old 15573,
> 1.0 cm". This is clearly a 10 mm belt and a 10 mm open end
> wrench will fit over it. After stopping at 3 different
> Autozones I finally found one that had old stock labeled
> "15573, 11AV1455, 1.1 cm x 1.5 m". This is an 11 mm belt and
> works fine on the GMC.
>
> One of the Autozones I stopped at had 15575 belts that say
> "replaces 15573". These also measured 10 mm.
>
> So it looks like one of the last stores carrying 11 mm belts
> has now changed to 10 mm.
>
> In the past I had reported that NAPA carries two llines of
> belts. NBH and PBH.
> The NBH belts are made by Gates and are 10 mm. The 11mm belts
> all have the prefix PBH and have the following part numbers.
> They are made by a company named Cadna which is an OEM supplier
> to Hyundai, Kia and Mercedes Benz.
>
> They are:
>
> Air conditioner, 403 PBH 401-7603
>
> Air conditioner, 455 PBH 401-7619
>
> Alternator 403&455 PBH 401-7570
>
> Water Pump & Power Steering 403 & 455 PBH 401-7450
>
> Water Pump & Power Steering 403 & 455 (shorter) PBH
> 401-7445
>
> HOWEVER, after getting home I went to my local NAPA to get a
> spare and they did not stock the PBH line. They looked it up
> in their catalog and it shows that it is also apparently now a
> 10 mm belt.
>
> For the new owners, I want to point out that the 10 mm belts
> ride low in the GMC Motorhome pulleys and will slip and squeal.
> The 10 mm probably works fine for smaller engines but for the
> 403 and 455 engines used in GMC motorhomes there is just too
> much torque for the 10 mm belts to work properly.
>
> Does anyone know of any supplier that would still have 11 mm
> belts other than old stock?
>
> If not we may have to determine if we can get replacement
> pulleys in a 1/2" size that will fit our GMC Motorhomes and
> convert to 1/2" belts.
>
>
>
> Emery Stora
> 77 Kingsley
> Santa Fe, NM
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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| Re: [GMCnet] Alternator belts [message #146728 is a reply to message #146727] |
Sun, 16 October 2011 19:42 |
SThornbg
Messages: 127
Registered: September 2011
Karma: 0
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Senior Member |
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Gary
Please advise what are the appropriate Dayco part numbers that you found....
I am in the market for a new alternator belt tomorrow as I blew one today on my way home from a Great Lakers rally.
Thanks for having done the legwork.
Steve Thornburg
South Bend, IN
'77 Palm Beach 455
Steve Thornburg
South Bend, IN
77 exPB 455 "Tinker Toy"
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| Re: [GMCnet] Alternator belts [message #146738 is a reply to message #146733] |
Sun, 16 October 2011 21:04 |
SThornbg
Messages: 127
Registered: September 2011
Karma: 0
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Senior Member |
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Thanks for the input Rob,
The one I just left on a Michigan highway this morning was a 15570 Dayco. It was only on for about 200 miles, was tightened to about 1/2 inch of deflection and just before letting go it screamed like a banshee........
This one may well have been my fault as I did not allow for new belt stretch and did not retighten the belt. I figured the slippage would cost me some alternator output, but did not think it would cause the belt to fail.
Steve Thornburg
South Bend, IN
'77 Palm Beach 455
Steve Thornburg
South Bend, IN
77 exPB 455 "Tinker Toy"
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| Re: [GMCnet] Alternator belts [message #146757 is a reply to message #146738] |
Sun, 16 October 2011 22:59 |
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ljdavick
Messages: 3548
Registered: March 2007
Location: Fremont, CA
Karma: -3
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Senior Member |
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Do people with double pulleys ever throw a belt? I'm sure it must happen, but I suspect it is much less frequent. The lager alternators many of us have put on these coaches require more torque, and one belt just might not be up to the task.
Larry Davick
The Mystery Machine
1976(ish) Palm Beach
Fremont, California
On Oct 16, 2011, at 7:04 PM, SThornbg wrote:
>
>
> Thanks for the input Rob,
>
> The one I just left on a Michigan highway this morning was a 15570 Dayco. It was only on for about 200 miles, was tightened to about 1/2 inch of deflection and just before letting go it screamed like a banshee........
>
> This one may well have been my fault as I did not allow for new belt stretch and did not retighten the belt. I figured the slippage would cost me some alternator output, but did not think it would cause the belt to fail.
>
> Steve Thornburg
> South Bend, IN
> '77 Palm Beach 455
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Larry Davick
A Mystery Machine
1976(ish) Palm Beach
Fremont, Ca
Howell EFI + EBL + Electronic Dizzy
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| Re: [GMCnet] Alternator belts [message #146778 is a reply to message #146757] |
Mon, 17 October 2011 04:11 |
Arthur Mansfield
Messages: 290
Registered: April 2010
Karma: 0
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Senior Member |
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I quit using Dayco belts because they stretch and I had to keep tightening them every 200 or 300 miles. I asked at my dealer and he told me they had allot of complaints about belt stretching. The Dayco belt cost me a clutch fan when the AC belt came off. I had about 300 miles since I had tighten the belts for the second or third time. SInce I quit using Dayco belts I have not had the stretching problem. I know the screamed like a banshee when using the Dayco belts and I had stopped and retightened the belts twice in less than 800 miles. It was great fun laying in a parking lot in the dark replacing the belt when I got tired of the screaming of the belts. The belt had warn until it was riding on the bottom of the pulley when I took it off or laying on top of a hot engine when one broke along side of the interstate in the dark. After the second problem I went to Autozone belts on that trip but was not happy with the belts. I then changed to Gates have not had a anymore
problems. It has been a couple thousand miles since I changed or had to retighten the belts. I was just thinking I had couple 66 Tornadoes and I changed the belts around 50,000 miles or so but have run other cars for 100,000 miles without any problems. I guess they do not make the belts the way they used to.
Yes! I do retighten the belts after they break in since they do wear in after a couple hundred miles.
I was thinking of replacing my belts but I guess I will have a problem since I do not know where to buy belts that fit anymore.
Art & Doris
On Oct 16, 2011, at 10:59 PM, Larry Davick wrote:
> Do people with double pulleys ever throw a belt? I'm sure it must happen, but I suspect it is much less frequent. The lager alternators many of us have put on these coaches require more torque, and one belt just might not be up to the task.
>
> Larry Davick
> The Mystery Machine
> 1976(ish) Palm Beach
> Fremont, California
>
>
> On Oct 16, 2011, at 7:04 PM, SThornbg wrote:
>
>>
>>
>> Thanks for the input Rob,
>>
>> The one I just left on a Michigan highway this morning was a 15570 Dayco. It was only on for about 200 miles, was tightened to about 1/2 inch of deflection and just before letting go it screamed like a banshee........
>>
>> This one may well have been my fault as I did not allow for new belt stretch and did not retighten the belt. I figured the slippage would cost me some alternator output, but did not think it would cause the belt to fail.
>>
>> Steve Thornburg
>> South Bend, IN
>> '77 Palm Beach 455
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| Re: [GMCnet] Alternator belts [message #146787 is a reply to message #146757] |
Mon, 17 October 2011 08:11 |
Mr ERFisher
Messages: 7117
Registered: August 2005
Karma: 2
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Senior Member |
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The lager alternators many of us have put on these coaches require more
torque, and one belt just might not be up to the task.
-------------------
It doesn't matter, it requires the same work to drive a 80 amp (OEM) as it
does to drive a 100, 200, --800 amp alternator at the same current drain.
Since you cannot force current into a battery, ( they will only take what
they want ) or you have some other load ( like electric fans - another
waste of power and money ;>), the load on the belt will be the same.
If you are living large (300 pounds of batteries) you might have a high
start-up load on the alternator with drained batteries (real bad for the
batteries).
But in reality, if you take out 10 amps for 5 hours (50 watt-hours) , you
will not be able to put back 50 amps for 1hour, the batteries will not
accept that.
should ask JerryW what his alternator load is in "living Large".
http://goo.gl/IZTPY
jwit
gene
>
> Larry Davick
> The Mystery Machine
> 1976(ish) Palm Beach
> Fremont, California
>
>
> On Oct 16, 2011, at 7:04 PM, SThornbg wrote:
>
> >
> >
> > Thanks for the input Rob,
> >
> > The one I just left on a Michigan highway this morning was a 15570 Dayco.
> It was only on for about 200 miles, was tightened to about 1/2 inch of
> deflection and just before letting go it screamed like a banshee........
> >
> > This one may well have been my fault as I did not allow for new belt
> stretch and did not retighten the belt. I figured the slippage would cost
> me some alternator output, but did not think it would cause the belt to
> fail.
> >
> > Steve Thornburg
> > South Bend, IN
> > '77 Palm Beach 455
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
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>
--
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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| Re: [GMCnet] Alternator belts [message #146860 is a reply to message #146832] |
Mon, 17 October 2011 20:02 |
Don A
Messages: 895
Registered: October 2008
Location: Dallas, TX
Karma: 0
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Senior Member |
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Larry, anyone have a source for gatorbacks? Thaat was what I tried to find on the road. Goodyear tire store told me he would havee to order, he gets his parts from Carquest.
| larry.whisler wrote on Mon, 17 October 2011 15:57 |
See if you can find Goodyear Gatorback belts. they are the wider width and work very well.
larry whisler
|
Don Adams Dallas, TX
'76 26' Glenbrook, '90 Sidekick
rebuilt by R Archer, powered by J Bounds, Koba
[IMG]http://www.gmcmhphotos.com/photos/data/6109/G2.jpg[/IMG]
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| Re: [GMCnet] Alternator belts [message #146882 is a reply to message #146860] |
Mon, 17 October 2011 22:40 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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Don,
The Good Year tire is a separate co from the Goodyear rubber and hose.
Goodyear hose people also make the cheap airbags that I have sitting
here as they denied warranty on.
I no longer purchase any hose, belts or air bags from those cheap outfit.
On Mon, Oct 17, 2011 at 6:02 PM, Don Adams <dj.adams@att.net> wrote:
>
>
>
> Larry, Â anyone have a source for gatorbacks? Â Thaat was what I tried to find on the road. Â Goodyear tire store told me he would havee to order, Â he gets his parts from Carquest.
>
>
>
> larry.whisler wrote on Mon, 17 October 2011 15:57
>> See if you can find Goodyear Gatorback belts. Â they are the wider width and work very well.
>> larry whisler
>
>
> --
> Don
> Dallas, TX
> 1976 26' Glenbrook />
> rebuilt by Arch
> powered by J Bounds, Koba
>
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--
Jim Kanomata
Applied/GMC, Fremont,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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www.appliedgmc.com
1-800-752-7502
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| Re: [GMCnet] Alternator belts [message #146962 is a reply to message #146721] |
Tue, 18 October 2011 18:52 |
Jim Galbavy
Messages: 1443
Registered: August 2007
Karma: 7
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Senior Member |
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Emery,
The shop that helped me out went thru 8 belts and combinations.
The NAPA 10mm A/C 9620, Alt 9570 and PS 9451 would not fit. The STD A/C 7540 didn't fit (too long). Ended up using NAPA A/C- XL 25 7603, PS- XL 25 7450 AND ALT- XL 25 7570. Drove them 2 hrs until I stopped for the night. Will see what tomorrow brings.
jim galbavy
73 x-CL ANNIE
Lake Mary, Fl
[Updated on: Wed, 19 October 2011 06:34] Report message to a moderator |
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