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belts slip [message #369220]

Wed, 23 March 2022 11:53

jhbridges

Messages: 8412
Registered: May 2011
Location: Braselton ga

Karma: -74

Senior Member

The belts on my toad slip and squeal. They're plenty tight. I notice however, there's rust in the pulleys. Any way to get it our, or is replacement in order? Which will be a PIA cos one is the vibration dampener.

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: belts slip [message #369221 is a reply to message #369220]

Wed, 23 March 2022 12:09

Matt Colie

Messages: 8547
Registered: March 2007
Location: S.E. Michigan

Karma: 7

Senior Member

Johnny,

If belts get old, they also get hard and won't grab the sheave as well.

If there is much corrosion, I have cleaned that with scotch-brite on a stick. The stick is so if it gets stuck in the running sheave, it wasn't your fingers.....

Matt

Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit

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[GMCnet] Re: belts slip [message #369222 is a reply to message #369220]

Wed, 23 March 2022 12:14

stu@97381.com, Emery

Messages: 232
Registered: June 2020

Karma: 2

Senior Member

Ken
It’s usually wood rosin.

Emery Stora

> On Mar 23, 2022, at 11:10 AM, Kenneth Henderson wrote:
>
> Johnny,
>
> You do know there's spray-on "belt dressing" (apparently some sort of
> non-drying glue) available at the parts stores? I've found that it does
> work, at least for a while.
>
> Ken H.
>
>> On Wed, Mar 23, 2022 at 12:53 PM Johnny Bridges via Gmclist > gmclist@list.gmcnet.org> wrote:
>>
>> The belts on my toad slip and squeal. They're plenty tight. I notice
>> however, there's rust in the pulleys. Any way to get it our, or is
>> replacement
>> in order? Which will be a PIA cos one is the vibration dampener.
>>
>> --
>> 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
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
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[GMCnet] Re: belts slip [message #369223 is a reply to message #369220]

Wed, 23 March 2022 12:09

jhbridges

Messages: 8412
Registered: May 2011
Location: Braselton ga

Karma: -74

Senior Member

Johnny,

You do know there's spray-on "belt dressing" (apparently some sort of
non-drying glue) available at the parts stores? I've found that it does
work, at least for a while.

Ken H.

On Wed, Mar 23, 2022 at 12:53 PM Johnny Bridges via Gmclist <
gmclist@list.gmcnet.org> wrote:

> The belts on my toad slip and squeal. They're plenty tight. I notice
> however, there's rust in the pulleys. Any way to get it our, or is
> replacement
> in order? Which will be a PIA cos one is the vibration dampener.
>
> --
> 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
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
>
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:

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: belts slip [message #369225 is a reply to message #369220]

Wed, 23 March 2022 12:54

jhbridges

Messages: 8412
Registered: May 2011
Location: Braselton ga

Karma: -74

Senior Member

Thanks Ken. I got some of that around here someplace, I'll find it and give it a try.
I believe the real problem is, the alternator is a replacement with a double sheave pulley, only one of which has a belt. If I belt the other one, there won't be sufficient wrap on the power steering pump to spin it. I suspect the replaceme4nt alternator is a higher amppere one than originally fitted and a single belt isn't sufficient to spin it under load.

--johnny

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] Re: belts slip [message #369226 is a reply to message #369223]

Wed, 23 March 2022 12:57

Matt Colie

Messages: 8547
Registered: March 2007
Location: S.E. Michigan

Karma: 7

Senior Member

jhbridges wrote on Wed, 23 March 2022 13:09

Johnny,

You do know there's spray-on "belt dressing" (apparently some sort of non-drying glue) available at the parts stores? I've found that it does work, at least for a while.

Ken H.

Then Emery added
Ken

It’s usually wood rosin.

Emery Stora

Johnny,

The spray on belt dressing works, but it is a temporary fix.
I used to use a lot on Chaumière before I put the double belt on the alternator.
It is worth a try. It could get you along until you really feel like changing the belts out.

Matt

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[GMCnet] Re: belts slip [message #369227 is a reply to message #369222]

Wed, 23 March 2022 12:32

James Hupy

Messages: 6806
Registered: May 2010

Karma: -62

Senior Member

More often than not, if the belt is riding in the bottom of the sheave,
that means one of two things. Sides of the belts are worn out. Or, the
usual culprit is that the sheaves ( pulleys) are worn out. I have taken
them off, and threw them in my glass bead cabinet and roughed up the sides
of the sheaves. Replaced the belts, and belt squeal went away until the
sheaves polished back up. No substitute for replacing sheaves with unworn
ones, though.
Jim Hupy
Salem, Oregon

On Wed, Mar 23, 2022, 10:14 AM Emery Stora via Gmclist <
gmclist@list.gmcnet.org> wrote:

> Ken
> It’s usually wood rosin.
>
> Emery Stora
>
>> On Mar 23, 2022, at 11:10 AM, Kenneth Henderson
> wrote:
>>
>> Johnny,
>>
>> You do know there's spray-on "belt dressing" (apparently some sort of
>> non-drying glue) available at the parts stores? I've found that it does
>> work, at least for a while.
>>
>> Ken H.
>>
>>> On Wed, Mar 23, 2022 at 12:53 PM Johnny Bridges via Gmclist >> gmclist@list.gmcnet.org> wrote:
>>>
>>> The belts on my toad slip and squeal. They're plenty tight. I notice
>>> however, there's rust in the pulleys. Any way to get it our, or is
>>> replacement
>>> in order? Which will be a PIA cos one is the vibration dampener.
>>>
>>> --
>>> 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
>>> _______________________________________________
>>> GMCnet mailing list
>>> Unsubscribe or Change List Options:
>>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
>
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Re: [GMCnet] Re: belts slip [message #369235 is a reply to message #369227]

Wed, 23 March 2022 18:36

Larry

Messages: 2875
Registered: January 2004
Location: Menomonie, WI

Karma: 10

Senior Member

James Hupy wrote on Wed, 23 March 2022 12:32

More often than not, if the belt is riding in the bottom of the sheave,
that means one of two things. Sides of the belts are worn out. Or, the
usual culprit is that the sheaves ( pulleys) are worn out. I have taken
them off, and threw them in my glass bead cabinet and roughed up the sides
of the sheaves. Replaced the belts, and belt squeal went away until the
sheaves polished back up. No substitute for replacing sheaves with unworn
ones, though.
Jim Hupy
Salem, Oregon

Or maybe you just have the wrong belt? To narrow?

Larry

78 Royale w/500 Caddy
Menomonie, WI.

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[GMCnet] Re: belts slip [message #369237 is a reply to message #369235]

Wed, 23 March 2022 23:26

powwerjon

Messages: 849
Registered: March 2013

Karma: -2

Senior Member

If you can slip a 10MM open end wrench over the belt then you have the
"NEWER" style belts that have been reduced in width. They will not work as
well as the old 1/2" wide belts. I have found a number of NAPA belts that
are still the correct width. For alternator belts I use a A56 belt and in
about 3 weeks I will be home and access to my parts book that have belt
numbers that will work. Again these new metric belts ride too low in the
pulley sheave and have very little contact to transmit the needed power.

Regards,

J.R. Wright
GMC Great Laker
GMCGL Tech Editor
GMC Eastern States
GMCMHI
TZE Zone Restorations
78 Buskirk Custom 29.5' Stretch
75 Avion (Under going Frame up Restoration)

On Wed, Mar 23, 2022 at 4:36 PM Larry wrote:

> James Hupy wrote on Wed, 23 March 2022 12:32
>> More often than not, if the belt is riding in the bottom of the sheave,
>> that means one of two things. Sides of the belts are worn out. Or, the
>> usual culprit is that the sheaves ( pulleys) are worn out. I have taken
>> them off, and threw them in my glass bead cabinet and roughed up the
> sides
>> of the sheaves. Replaced the belts, and belt squeal went away until the
>> sheaves polished back up. No substitute for replacing sheaves with unworn
>> ones, though.
>> Jim Hupy
>> Salem, Oregon
>
> Or maybe you just have the wrong belt? To narrow?
> --
> Larry
> 78 Royale w/500 Caddy
> Menomonie, WI.
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
>
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Re: belts slip [message #369250 is a reply to message #369220]

Fri, 25 March 2022 07:54

jhbridges

Messages: 8412
Registered: May 2011
Location: Braselton ga

Karma: -74

Senior Member

They're the correct belts, and ride slightly proud in the sheaves. I suspect JimH is correct, rep[lacing the dampener pulley looks to e a colossal PIA. Sigh. As far as I can tell, this engine (300 6) was discontinued before the advent of single multi-rib belts.

--johnny

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: belts slip [message #369258 is a reply to message #369250]

Fri, 25 March 2022 10:43

Matt Colie

Messages: 8547
Registered: March 2007
Location: S.E. Michigan

Karma: 7

Senior Member

jhbridges wrote on Fri, 25 March 2022 08:54

They're the correct belts, and ride slightly proud in the sheaves. I suspect JimH is correct, rep[lacing the dampener pulley looks to e a colossal PIA. Sigh. As far as I can tell, this engine (300 6) was discontinued before the advent of single multi-rib belts.

--johnny

You are correct, I had two of the last of the 300-6s and they were still V-belt.
Matt

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