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SUper H brakes.

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GordoSD

05-03-2007 08:09:45

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I wonder if I am trying too hard? My new SH Stage II had almost zero brakes. I pulled them and did all of the tricks. New chrome balls, graphite on them. Polished the ramps. Cleaned everything spotless. Sanded the discs and metal surfaces with 24 grit flap wheel.Splines cleaned and lubed with never seize. Now with pretty hard pressure, the brakes 'slow' the tractor but no way can you lock up a wheel to turn, or even 'almost lock' one up. Local told me all the plates may be worn and I need to plane the cover down. I just want to know how effective they ought to be. Should I be able to stop on a dime or is just a slow stop the best you should expect.When I did tear them down after a long road ride the discs were pretty well glazed. What have I missed? I've had them apart three times and still not happy

Gordo

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jimmyjoe in mn

05-03-2007 18:28:04

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Re: SUper H brakes. in reply to GordoSD, 05-03-2007 08:09:45

Clean the rust off of the inside of the drums and with the actuators in the drum try to turn them and you will see where the tab on the actuator hits the stop in the drum. That is your power brake. If it does not turn easy you might have to grind a little metal off. That is what I had to do. Jim

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GordoSD

05-03-2007 19:44:15

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Re: SUper H brakes. in reply to jimmyjoe in mn, 05-03-2007 18:28:04

I couldn't turn the actuators far enough to hit the tabs. I blocked the drum down on the bench, and pulled it with a comealong! Some problem in there I have to find. Thanks.

Gordo

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GordoSD

05-03-2007 13:01:34

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Re: SUper H brakes. in reply to GordoSD, 05-03-2007 08:09:45

Thanks for all the help. Fourth tear down done. I can remove one side now in 1 minute flat (power wrenchs). Stacked everything up, less than 1/8 inch clearance. Sand blasted the discs and the plates. Discs miked out at .475 inches. Bet they are .500 new. Test drove, and I actuall got to skid the tires, on gravel. But still apretty good push.But I'd say they are 80 percent efficient now. As I didn't do the plate on the tractor, (sand in splines and seal) that's acceptable. I have a feeling the discs are just too hard of a material. Probably epa safe to eat, but not worth a fiddlers ---- for braking While I had the assembly off on the bench i tried pulling the plates apart with a small hand winch. Those plates just don't seem to want to rotate very easily.

Gordo

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jimmyjoe in mn

05-03-2007 11:30:07

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Re: SUper H brakes. in reply to GordoSD, 05-03-2007 08:09:45

One other thing is to make sure that the actuators turn freely in the drums. Jim

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GordoSD

05-03-2007 17:24:19

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Re: Super H brakes. in reply to jimmyjoe in mn, 05-03-2007 11:30:07

This has me worried. I don't think the actuators are turning as freely as they should. How do you fix that?

Gordo

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jimmyjoe in mn

05-03-2007 11:05:40

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Re: SUper H brakes. in reply to GordoSD, 05-03-2007 08:09:45

One other thing is to make sure that the actuators turn freely in the drums. Jim

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superih

05-03-2007 10:41:17

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Re: SUper H brakes. in reply to GordoSD, 05-03-2007 08:09:45

I sand blast the actuators and drums to rough them up to help grab, you can also blast the brake pads themselves. When they work good you will almost have too much stopping power.

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Pat H

05-03-2007 10:27:05

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Re: SUper H brakes. in reply to GordoSD, 05-03-2007 08:09:45

sounds like new disks might be needed, they should lock up with little brake pedal pressure. I have problems on one of mine that the brake drags a little, it heats up and then locks up after about 3/4 mile of travel. just far enough from the shed and the tools to make you mad. Pat in Wis. p.s. - was wondering if your motor serial number is 33870 approximately. Thanks, Pat

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GordoSD

05-03-2007 13:06:31

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Re: Super H brakes. in reply to Pat H, 05-03-2007 10:27:05

Yeah it's somewhat close to 33870; it's 33869!
What's your tractor serial? This one was in the very last few days of production.

Gordo

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Bob M

05-03-2007 09:28:43

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Re: SUper H brakes. in reply to GordoSD, 05-03-2007 08:09:45

Gordo - Have you replaced the friction disks? If you just cleaned up the old disks but they're worn below a certain thickness the brakes won't work worth a d*mn. (I don't recall the minimum thickness dimension but the tractor vet's "stackup" test below is right on...). Planing the covers can help compensate for worn disks. But you'd be better off to simply buy new disks.

FWIW I stuck new friction disks in my SH about 6 years ago. Several hundred hours of operation later brakes will still skid the tires on a paved road with only moderate pedal pressure.

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the tractor vet

05-03-2007 08:31:19

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Re: SUper H brakes. in reply to GordoSD, 05-03-2007 08:09:45

Gordo try this , take the drum off place all the pices and parts in the drum lay a stright edge across the drum and massure the clearance between the edge and the disc if ya have more then and 1/8th of and inch then machine i said machine the edge of the drum off so everything is flat from the drum face to the mounting edge of the drum . What i Think is happening here is that you have to much clearance and have the adjusters pulled out tofar and are at the end of the ramps on the balls and this will not give the braking force . Also remove the never seeze as this will collect brake dust and cause the disc to not slide on the splines.

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ChadS

05-03-2007 08:17:42

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Re: SUper H brakes. in reply to GordoSD, 05-03-2007 08:09:45

My 53 SH does the same thing,, works good for a while till the disks glaze over and barely nothing,,, replaced everything, and still the same result you have.

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