Ford 641 too much hydraulic pressure

Bobby9233 · Jul 31, 2018

I have had to rebuild the hydraulic pump 3 times. I did not realize it was a too much pressure problem until this last time. Do es anyone know why why I am having this problem. The pressure built up so much this last time it blew the O ting in the pump and I got covered in hot hydraulics oil. Any help would be appreciated

russ1 · Jul 31, 2018

Relief valve?

JMOR · Jul 31, 2018

(quoted from post at 18:42:55 07/31/18) I have had to rebuild the hydraulic pump 3 times. I did not realize it was a too much pressure problem until this last time. Do es anyone know why why I am having this problem. The pressure built up so much this last time it blew the O ting in the pump and I got covered in hot hydraulics oil. Any help would be appreciated

ow much are you calling 'too much'? What did pressure gauge indicate?

showcrop · Jul 31, 2018

Do you have the "blow pressure rating" for that O-ring?

shaun wallace · Jul 31, 2018

The only "oring" on 641 is in manifold. I have not seen the square seals used ever blow out and before when used orings they held.

Dean · Jul 31, 2018

Have you replaced the relief valve with an aftermarket one?

I've seen aftermarket relief valves that do not relieve at "any" pressure.

Dean

riveroadrat · Jul 31, 2018

Your hydraulics might need adjusting. When I changed the cam pin in mine it wouldnt let the arms all the way down and the pressure relief valve started squealing when the handle was pulled all the way up. I think it messed something up in mine as I forgot about the squeal when I was using it.

Ford 641 too much hydraulic pressure

Bobby9233

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russ1

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JMOR

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showcrop

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shaun wallace

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Dean

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riveroadrat

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