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Discussion Forum
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AC 190 hydraulic pump

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jerry

06-22-2002 14:37:14




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I am haveing trouble with the front seal in a triple stage hydraulic pump. The seal blew out I replaced it, and it blew out again after a few hours running. I was wondering if the pump section seals where leaking and caused this. Or maybe the bearing at the front drive or a bearing in the pump itself. Any help would be great.




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Craig MO

06-22-2002 18:25:56




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 Re: AC 190 hydraulic pump in reply to jerry, 06-22-2002 14:37:14  
You need to take pump apart and put in oring seals under wear plates. You can buy the kits for each section with all the seals and get the wear plates if they are grooved or wore.



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jerry

06-22-2002 18:40:31




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 Re: Re: AC 190 hydraulic pump in reply to Craig MO, 06-22-2002 18:25:56  
Thanks Craig, I was also wondering if the front pump seal is available as a assembled unit. When I replaced the seal I noticed the old seal when pressed in, had shaved a small ridge ahead of it when the factory pressed it in. I also noticed the old seal seemed to be a double lipped seal and the replacement was singled. I put the lip towards the pump? correct?? The manual said this seal should be replaced as an assembly does that mean the seal should come already installed to the retainer plate?Also does this seal seal the hydraulic pressure of the pump or just seperate the oil from the engine from reaching the pump?

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Craig MO

06-23-2002 18:49:51




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 Re: Re: Re: AC 190 hydraulic pump in reply to jerry, 06-22-2002 18:40:31  
The seal come as a seal not in the retainer plate. If you feel you have shaved off a little too much when installing seal use loctite or 515 sealant when reasembling. The lip goes to the inside of the pump and it does seal some pump pressure but if bushings or seals inside are wore or blown the outer seal is not designed for this. The original seal sealed engine oil from sucking into pump and also seal hyd pump.Basically the seal is used to keep oils seperated when all others are in good shape.

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