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NAA With Davis Loader

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Author  [Modern View]

07-24-2017 10:26:13

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I have a well used NAA with a Davis loader and separate front pump. I changed the fluid in the loader system due to it being contaminated with water. While it was easy, and for sure needed done...I can't seem to get all of the air from the system. The loader moved pretty quickly before, and the bucket cylinder seems to be the same, but the lift arms are really slow, and the pump whines really bad when its lifting. Any ideas to get the air out? Any advise is appreciated.

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08-09-2017 17:05:32

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 Re: NAA With Davis Loader in reply to crewdog506, 07-24-2017 10:26:13  
So I was able to get it fixed. Turns out, the gasket on top of the filter canister was leaking. I made a new rubber gasket, replaced it, fired it up and it's good now. I'd say the way the system pulls fluid from the resevoir, it needed sealed to create a vacuum to pull the fluid. Since it was not sealed, it was sucking air at the filter, instead of fluid from the resevoir. Oh, and the filter and oil looked okay...I'll probably run it a little longer and do another filter/oil change.

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Sean in PA

07-24-2017 12:26:30

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 Re: NAA With Davis Loader in reply to crewdog506, 07-24-2017 10:26:13  
Cycling all of the cylinder from fully retracted to fully extended and back several times should purge any air in the system.

Sounds like there may be some gunk that got into the lift cylinder part of the circuit and is partially clogging it. Most likely in the section of the control valve that controls the lift cylinders.

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07-24-2017 11:41:05

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 Re: NAA With Davis Loader in reply to crewdog506, 07-24-2017 10:26:13  
Yeah, there is a filter canister. I changed the filter, and changed the screen assembly with a spare I had...because it has some holes in the screen.

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07-25-2017 07:39:42

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 Re: NAA With Davis Loader in reply to crewdog506, 07-24-2017 11:41:05  
i'd pull that filter/screen and check again. water emulsified oil can get pretty thick.

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07-24-2017 11:30:08

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 Re: NAA With Davis Loader in reply to crewdog506, 07-24-2017 10:26:13  
Is there a canister with a filter in it at the front pump? Did you change the filter?

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