The Ford Barn

RockHillWill · 01-22-2013, 06:24 PM

Where are you gentlemen buying springs to rebuild the standard clutch assemblies? I might have access to one of my friends intake / exhaust valve spring raters and I would be interested in knowing if anyone has a rate / height spring pressure for me to go by in determining if existing springs are reuseable.

RockHillWill · 01-22-2013, 09:34 PM

Hello Ed, that is good information. I will save it and try to look for a local supplier.

I did not think to look in the service bulletins, etc. Any info there???

RockHillWill · 01-23-2013, 06:57 AM

Thank you Ed. I had remembered seeing that, but could not remember where it was.

Thnaks for taking the time to share that.

Kurt in NJ · 01-23-2013, 09:01 AM

For V8 there are little shop manuals on sections--engine, driveline ----the driveline one has pressure plate and disc rebuilding specs, the A type of pp was used till 34 or so and is in there.

Marco Tahtaras · 01-23-2013, 02:41 PM

Unless the low mileage cars I've driven have tired springs, rebuilders are using stiffer springs than Ford used. Personally I'd like to see one or both of the drawings for A-7572 "Clutch Pressure Spring" and work from there.

RockHillWill · 01-23-2013, 10:59 PM

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Thanks Marco, I too would prefere to see that spring drawing(s). Do you have either of them or were you 'wishing" to see them?

Marco Tahtaras · 01-24-2013, 10:47 AM

Quote:

Originally Posted by RockHillWill

Thanks Marco, I too would prefere to see that spring drawing(s). Do you have either of them or were you 'wishing" to see them?

If I had either of the two drawings I would have provided you with the specs!

35topdown · 01-24-2013, 11:16 AM

We built Model A clutches for years. Been in business since the 1936. A lot of guys liked to take springs out of the pressure plates. They were too strong originally. Contact Brake & Clutch Supply, Waco, TX 254-752-4397 for parts or rebuilding.

Bruce Lancaster · 01-24-2013, 11:23 AM

The basic Model A type pressure plate was used through 1934 and rebuild is covered in the 1932-47 book "Repair manual--transmissions, clutches, overdrives, and power take-offs, 1932-47"
I believe this is reprinted and available at V8 repro parts places. There are test specs for the springs, and there are B springs which would be same as A, I believe, and BB and one other V8 truck set which are stiffer than that. Quite possibly the springs now used are one of the 2 truck sts..weakest usable B spec is 110 pounds, greatest truck spec is 140 to show the range.

Marco Tahtaras · 01-24-2013, 04:05 PM

Quote:

Originally Posted by Bruce Lancaster

The basic Model A type pressure plate was used through 1934 and rebuild is covered in the 1932-47 book "Repair manual--transmissions, clutches, overdrives, and power take-offs, 1932-47"
I believe this is reprinted and available at V8 repro parts places. There are test specs for the springs, and there are B springs which would be same as A, I believe, and BB and one other V8 truck set which are stiffer than that. Quite possibly the springs now used are one of the 2 truck sts..weakest usable B spec is 110 pounds, greatest truck spec is 140 to show the range.

My bulletins only go to 1941 so I don't have that. Do they give specific values or a go, no-go range? Obviously the value would be given at a specific compressed dimension to be of any value.

As a side note, I would still prefer to know the specs used when the cars were in production. They may have retained the same specs in later years but I would prefer to know the details without assumptions.

d.j. moordigian · 01-24-2013, 04:13 PM

Quote:

Originally Posted by Marco Tahtaras

Obviously the value would be given at a specific compressed dimension to be of any value.

Exactly, plus the "rate" of the spring.

Bruce Lancaster · 01-24-2013, 04:48 PM

This is a separate small book, not a bulletin. Specs are a bit odd... for the spring relevant here, the one for the B-7563 pressure plate, spec is given as spring load 110-120 pound-feet. I am not sure how they mean for that to be applied...I would expect to see a length of compression in there, but this seems just a rate. These are test specs for used springs, too, but I would suspect that high number is likely production value.
"test the spring load of each clutch pressure spring with a tension scale", with no further explanation and no illustration of process or tension scale for this or for the later Long plates.

01-22-2013, 06:24 PM	#1
RockHillWill Senior Member Join Date: May 2010 Location: Rock Hill, S.C. Posts: 985	Clutch rebuild info needed Where are you gentlemen buying springs to rebuild the standard clutch assemblies? I might have access to one of my friends intake / exhaust valve spring raters and I would be interested in knowing if anyone has a rate / height spring pressure for me to go by in determining if existing springs are reuseable. __________________ Uncle Bud says "too soon old, too late smart!"

01-22-2013, 09:34 PM	#2
RockHillWill Senior Member Join Date: May 2010 Location: Rock Hill, S.C. Posts: 985	Re: Clutch rebuild info needed Hello Ed, that is good information. I will save it and try to look for a local supplier. I did not think to look in the service bulletins, etc. Any info there??? __________________ Uncle Bud says "too soon old, too late smart!"

01-23-2013, 06:57 AM	#3
RockHillWill Senior Member Join Date: May 2010 Location: Rock Hill, S.C. Posts: 985	Re: Clutch rebuild info needed Thank you Ed. I had remembered seeing that, but could not remember where it was. Thnaks for taking the time to share that. __________________ Uncle Bud says "too soon old, too late smart!"

01-23-2013, 09:01 AM	#4
Kurt in NJ Senior Member Join Date: May 2010 Location: on the Littlefield Posts: 6,556	Re: Clutch rebuild info needed For V8 there are little shop manuals on sections--engine, driveline ----the driveline one has pressure plate and disc rebuilding specs, the A type of pp was used till 34 or so and is in there.

01-23-2013, 02:41 PM	#5
Marco Tahtaras Senior Member Join Date: May 2010 Posts: 3,099	Re: Clutch rebuild info needed Unless the low mileage cars I've driven have tired springs, rebuilders are using stiffer springs than Ford used. Personally I'd like to see one or both of the drawings for A-7572 "Clutch Pressure Spring" and work from there. __________________ http://www.abarnyard.com/

01-23-2013, 10:59 PM	#6
RockHillWill Senior Member Join Date: May 2010 Location: Rock Hill, S.C. Posts: 985	Re: Clutch rebuild info needed Sponsored Links (Register now to hide all advertisements) Thanks Marco, I too would prefere to see that spring drawing(s). Do you have either of them or were you 'wishing" to see them? __________________ Uncle Bud says "too soon old, too late smart!"

01-24-2013, 11:16 AM	#8
35topdown Member Join Date: May 2011 Location: Texas Posts: 40	Re: Clutch rebuild info needed We built Model A clutches for years. Been in business since the 1936. A lot of guys liked to take springs out of the pressure plates. They were too strong originally. Contact Brake & Clutch Supply, Waco, TX 254-752-4397 for parts or rebuilding.

01-24-2013, 11:23 AM	#9
Bruce Lancaster Member Emeritus Join Date: May 2010 Location: Madison, NJ Posts: 5,230	Re: Clutch rebuild info needed The basic Model A type pressure plate was used through 1934 and rebuild is covered in the 1932-47 book "Repair manual--transmissions, clutches, overdrives, and power take-offs, 1932-47" I believe this is reprinted and available at V8 repro parts places. There are test specs for the springs, and there are B springs which would be same as A, I believe, and BB and one other V8 truck set which are stiffer than that. Quite possibly the springs now used are one of the 2 truck sts..weakest usable B spec is 110 pounds, greatest truck spec is 140 to show the range.

01-24-2013, 04:48 PM	#12
Bruce Lancaster Member Emeritus Join Date: May 2010 Location: Madison, NJ Posts: 5,230	Re: Clutch rebuild info needed This is a separate small book, not a bulletin. Specs are a bit odd... for the spring relevant here, the one for the B-7563 pressure plate, spec is given as spring load 110-120 pound-feet. I am not sure how they mean for that to be applied...I would expect to see a length of compression in there, but this seems just a rate. These are test specs for used springs, too, but I would suspect that high number is likely production value. "test the spring load of each clutch pressure spring with a tension scale", with no further explanation and no illustration of process or tension scale for this or for the later Long plates.