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John Deere Tractors Discussion Forum
Show Parts for Model:

72 4000 brakes

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FFF

02-04-2013 10:37:45
96.32.44.46



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I have a 72 4000 bought recently. I posted once that the brakes seem grabby. Having used it some now I realize the brakes are more all or nothing than just grabby. Sometimes when you start the tractor the pedals are rock hard for a while then loosen up. There is really very little middle ground, the brakes are off or locked up. Then once you take your foot off the pedal they seem to hang up for a moment until they let go. I changed the filter cleaned the screen and the oil. All where clean. Any more ideas. Thanks

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FFF

02-04-2013 13:33:05
24.177.86.55



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 Re: 72 4000 brakes in reply to FFF, 02-04-2013 10:37:45  
There is no kicking when you push on the pedals. I saw kicking under the troubleshooting section in the service manual. I will try bleeding the brakes before I remove the valve assembly.



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Tech 7

02-04-2013 12:37:44
206.47.90.66



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 Re: 72 4000 brakes in reply to FFF, 02-04-2013 10:37:45  
I have seen grabby brakes caused by the valve...will the pedals "kick" when you apply? This makes me lean toward the valve being the issue. Not a bad job to install a kit.



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Tim S

02-04-2013 10:54:06
75.60.192.141



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 Re: 72 4000 brakes in reply to FFF, 02-04-2013 10:37:45  
There could be a problem with the actuating valves or the equalizers..If the brake lining was down to the metal it would still not act like that,,I would start with the valve.If it has or has had bad boots there could be some rust holding the upper pistons from working smooth ...



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