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Old 01-05-2019, 05:04 AM
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Question Proportion Valve question.

When I check/push the reset on the prop valve there is a bit of fluid that leaks out. Is this normal?
Movement on the reset button is only about 1/16".

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Old 01-05-2019, 08:00 AM
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Originally Posted by Bob37pont View Post
When I check/push the reset on the prop valve there is a bit of fluid that leaks out. Is this normal?
Movement on the reset button is only about 1/16".
No. The o-ring that seals that button is apparently bad.
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Old 01-05-2019, 01:14 PM
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Thanks Joe.
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Old 01-06-2019, 01:37 PM
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And additionally...

Shouldn't the push on contact post between the two inlets go to ground (electrically) when the brakes are pressurized?
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Old 01-06-2019, 01:39 PM
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Shouldn't the push on contact post between the two inlets go to ground (electrically) when the brakes are pressurized?
No. It's a differential pressure switch. It only makes contact if you loose pressure on one side of the brake system and the internal piston is forced all the way to one side.

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Old 01-06-2019, 01:42 PM
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Originally Posted by joe_padavano View Post
No. It's a differential pressure switch. It only makes contact if you loose pressure on one side of the brake system and the internal piston is forced all the way to one side.

Oh, so it would be a brake failure indicator. Got, thanks again Joe.
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