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Farmall & IHC Tractors Discussion Forum
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1206 brakes

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BODE

05-15-2005 04:57:00




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I HAVE A 1206 FARMALL AND WHEN I STEP ON THE BRAKES THE PEDDALS GO ALL THE WAY DOWN THEN AFTER 15 TO 30 SECONDS THEY START TO WORK. WORK GREAT THEN UNTILL I NEED THEM AGAIN. CAN ANY BODY HELP.




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the tractor vet

05-15-2005 07:27:12




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 Re: 1206 brakes in reply to BODE, 05-15-2005 04:57:00  
Well the first place to start looking is in the brake . If the adjusters are working and nothing is wore out or broken then the next place to look is in the MCV as that is where the hdy. oil comes from . And since it is a 1206 and it ain't no spring chicken then it could be a week pump , low pressure stuck or sticky valve leaking gskts seeping o/ring week springs . Also try to bleed the brakes by opening the bleedeson at a time and hold that brake pedal down till fluid comes out then close the bleeder while the pedal is down and fluid is still running. Get a IT manual and read up on it .

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BODE

05-15-2005 08:17:49




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 Re: 1206 brakes in reply to the tractor vet, 05-15-2005 07:27:12  
TRACTOR VET
HAVE THE MANUAL AND OPERATORS MANUAL. BOTH ARE VERY VAGUE ABOUE THE HYDS. SAYS THERES A CHECK VALVE FOR THE BRAKES BUT NEITHER ONE SHOWS IT AT ALL. I ASSUME IT IS ON THE MPV BUT DONT KNOW WHERE TO START. HAD BOTH SIDES OFF AND THE PADS ARE VERY GOOD YET. ONE ADJUSTER WAS BENT SO I REPLACED IT.
PERHAPS YOU COULD SUGGEST A MANUAL THAT WILL SHOW ME THE MPV AND ASSOCIATED CIRCUTS AND PARTS.

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the tractor vet

05-15-2005 13:49:09




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 Re: 1206 brakes in reply to BODE, 05-15-2005 08:17:49  
There is a check valve in the fitting on the line that goes into the brake control valve but all that does is hold oil in the valve when the engine is off and will littel or no effect while running . Unless ya got a service manual or and I T manual it is hard to understand and it would take up a lot of band wideth for me to walk ya thru everything . First ya need a pressure gauges that will read 600 lbs. a liquide filled prefered a JIC fitting to go into the bottom plug of the MCV and hook up to the gauge . then ya need atleast 200+ lbs on the MCV i like 265-285 , i use (2) gauges but then ya need the special test tool for the dump valve but you can get and idea of what you have with one. I would bet that your problem is in the MCV on the flow devider from a weak spring or sticky valve. It is not common that the brake vavle is the problem . Sometimes this is caused by the adjusters getting stuck on one side and you have to force the brake to stop only on half or you could have a brake seal leaking or a piston O/Ring seeping and allowen oil on the brake this will also give about the same resualts . Like i said before i need a lear jet to run around and fix all the had problems for you guys cause i can fix them just about as fast as i type.

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