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gostate
Regular
Joined: 11 Sep 2010
Posts: 34
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 Posted: Fri Dec 07, 2012 5:51 am Post subject: 4020 brakes |
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Console 4020. Left brake works fine. Push right brake both wheels lock up. What should I look at?
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Tx Jim
Tractor Guru
Joined: 14 Feb 1999
Posts: 13167
Location: Coyote Flats,Tx
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| Posted: Fri Dec 07, 2012 6:30 am Post subject: Re: 4020 brakes |
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Equalizing valve malfunctioning in the brake valve housing.
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WTW
Long Time User
Joined: 12 Jun 2000
Posts: 1114
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| Posted: Fri Dec 07, 2012 8:23 am Post subject: Re: 4020 brakes |
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Each brake valve actuating piston has a mechanical pin that independently open its equalizing valve. The pin controlled by the left actuating piston is stuck in its bore holding that valve open. This valve should be closed when using right brake by itself. Result in both brakes being applied when right brake is only activated. These control pins are located in the top section of the brake valve in an angled bore between the actuating piston. They are about an inch long and 3/16” in diameter.
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DONMYEIL
Long Time User
Joined: 14 Oct 2004
Posts: 849
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| Posted: Fri Dec 07, 2012 12:34 pm Post subject: Re: 4020 brakes |
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Rubber boots are cracked letting in dirt and moisture causing the plungers to stick.
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