[AT] Now Ralph Video -- disc brakes

[Dave Rotigel]

I sure hope you properly dried your M off and reshined the tires before you turned the lights in the shed off Dean!
	Dave
BEAUTIFUL M!

On Dec 29, 2012, at 10:35 AM, Dean Vinson wrote:
> 
> By the way, all last winter I waited for an opportunity to photograph my
> Super M in the snow, but never got one.  Today was the day.  (The snow is
> even deep enough that I needed to use the disc brakes to steer the tractor.
> :)
> 
> http://www.vinsonfarm.net/photos/happy_new_year.jpg
> 
> Happy New Year, everyone!
> 
> Dean Vinson
> Dayton, Ohio
> 
> 
> -----Original Message-----
> From: at-bounces at lists.antique-tractor.com
> [mailto:at-bounces at lists.antique-tractor.com] On Behalf Of Grant Brians
> Sent: Saturday, December 29, 2012 7:29 AM
> To: Antique tractor email discussion group
> Subject: Re: [AT] Now Ralph Video -- disc brakes
> 
> I have both Disc and Drum Brake installations on my Oliver 77s. Oliver
> changed from Drum to Disc in about 1952 and because it was a bolt in swap,
> many owners chose to swap. When properly adjusted the Disc Brakes don't fade
> and are the same actuating force. I can't see any additional braking power
> though. Having operated them for quite a few years I find that at top speed
> (depending on the gearing and wheel size it is 10-13mph) they will stop
> fast, but it is very tricky to apply force evenly both because of the two
> sides and the connection mechanism. Both setups are phenomenally easy to
> perform SHARP turns with - my tricycles can literally lock the appropriate
> wheel and spin a 180 degree turn such that depending on conditions the
> tractor either has not moved the placement of the braked wheel or it has
> only shifted over 2-3 inches. A 360 degree turn returns the tractor to the
> same wheel placement.
>     The system on the Olivers sounds similar to the IH system of disc
> brakes, but I have never seen wear on the steel surfaces, only the multiple
> discs used on each side. At this moment (4AM) I cannot remember how many
> lined and unlined plates are on each side, but I vaguely remember that it
> may be 6 per side. The Oliver system is a 100% mechanically operated one.
>     Having described the Oliver 66, 77 and 88 setup and performance, I also
> have an AC model C and I believe that to convert it to disc brakes would be
> nearly impossible and think it would be harder to use. But as I cannot see a
> way to do so without immense modifications to the tractor, perhaps I am
> wrong.
>     Also, I have one of my Studebakers that have disc brakes (the first
> production US model to do so). It uses the UK designed and produced Girling
> system that requires a power brake booster to operate as it requires much
> more force than the drum brakes. This is the same brakes that Jaguar used in
> the 1950s and  1960s. My opinion is that again they have less fade by far,
> but they do not give any benefits for normal operation. The rotors do last
> MUCH longer than the newer systems in cars that use the non-asbestos pads
> and the discs are of much better quality too, but the pads last a shorter
> time.
>     I hope this is informative.
>           Grant Brians
>           Hollister,California vegetable, nuts and fruit farmer - it is WET
> here and that is hampering our current production!
> 
> 
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