[AT] Now Ralph Video -- disc brakes

Richard Fink Sr rfinksr at verizon.net
Sat Dec 29 07:42:41 PST 2012


Charlie i tried that back 30 years ago on an old case 310 with loader and 
hoe. Took rotors and mounts off a F250 and put on it  they worked can,t say 
as good or worse that original never had. Could not get the pads i needed 
for original brakes. It was a real pain two master cyl. and hook up.
would never try that again.
R Fink
White snowy PA



----- Original Message ----- 
From: "charlie hill" <charliehill at embarqmail.com>
To: "Antique tractor email discussion group" <at at lists.antique-tractor.com>
Sent: Friday, December 28, 2012 7:08 PM
Subject: Re: [AT] Now Ralph Video -- disc brakes


>I understand that Ron but those taller tractor tires aren't turning 1000 
>rpm
> and trying to stop
> a 8,000 lb x 90 ft/sec load either and they aren't stopping that load
> against asphalt.  All I want to
> do is stop one wheel turning about 4 rpm with a 2500 lb x 6 ft/sec load in
> soft dirt while allowing the
> engine hp to continue pushing the other wheel unimpeded.
>
> Don't check my math it's a guesstimate but the point is the same, while 
> the
> torque amplification
> may be a lot greater on a tractor the overall torque load that the brake 
> is
> stopping is a lot less
> and with a lot less heat than the brake rotor is designed to handle.  I've
> seen trucks on the highway
> running tires about as tall as the ones on a D-14 A-C and the D-14 isn't
> running 60 mph and doesn't
> weigh 8000 lbs.   Take the load times the speed and calculate the HP
> required to stop it, then back out
> the rpms of the wheel and I think we will find that the torque load on 
> that
> brake assembly is a lot less on the D-14
> than it would be on the truck it's designed for.  I may be wrong.  I don't
> feel much like accurately working it out right now.
>
> To my mind the critical part is fabricating and attaching a mounting 
> bracket
> for the disc caliper that is up to the task.
> I'll have to do some studying on the possible mounting locations on the
> tractor axle to figure that out.
> It really doesn't much matter.  I doubt that I'll ever do it.  It's just a
> bench engineering exercise.
>
> Charlie
>
>
>
> -----Original Message----- 
> From: rdhaskell at juno.com
> Sent: Friday, December 28, 2012 6:37 PM
> To: at at lists.antique-tractor.com
> Subject: Re: [AT] Now Ralph Video -- disc brakes
>
> Hi Charlie.  The problem is on a truck you have tires that are maybe 31"
> tall, and on a tractor you have tires 5' tall.  The mechanical advantage
> goes to the tire .  Even putting over size tires on a car diminishes the
> breaking capability, and you are talking just a few inches taller.
>
> Ron Haskell
> rdhaskell at juno.com
> Riverside, California USA
> http://picasaweb.google.com/RonHaskell
>
> On Fri, 28 Dec 2012 17:49:44 -0500 "charlie hill"
> <charliehill at embarqmail.com> writes:
>> Could be Tom but it seems to me that disc brakes from the front of a
>> 2500 or
>> 3500 series truck
>> should be able to handle a 4000 lb tractor with no problems.  I
>> guess the
>> only way to find out is to try it.
>>
>> Charlie
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