Re: Got the 300u going, but...

Posted by JayWalt on February 12, 2007 at 14:22:37 from (70.226.20.153):

In Reply to: Re: Got the 300u going, but... posted by Unreserved dick on February 12, 2007 at 13:32:36:

A BIG TTHANKS!!!

I thought i was going crazy when I was recalling that the pump is a demand only system controlled by the safety reg. The reg has 2 "valve chambers" and as you stated one is most likely a regulator valve, and the other loads and unloads the pump.
With everyone talking about open center valves, I was getting a little bewildered at what that 3rd port did. The system is calming down and only cycled 2x today. I bled the main lift cylinders by removing them and using the hydraulics to extend them, then with the hose end in the air, and the valve set to dump, pushed the rods back in. I did this 3 times on each arm. No more bouncy loads.

Lets hope that all it was was air in the system. I recall way back when someone wanting to plumb remote valves into the res and someone mentioning theyd have to tape the holes for fittings instead of the oring seal. Well guess what, they are already tapped!! The valve ports are as well. They have a pring or pipe thread design. I dont know what one would do with the 3rd hole in that res cover if they used remote valves.

By chance do you have a "shametic" of sorts for this system so I can better understand it.

The pump still is noisy, which is is expected since theres not much to fix that if the obvious has been address and its still there. It is something I will have to live with until she goes. Ideally, if i was more confortable with the rest of the tractors condition I would spring for a new one.

Maybe you know, but this sound is not as much of a whining as a , well i cant explain it, its not a whining or grinding sound. Besides pump where what could cause this? It is worse with a good load on it. I have a few ideas on what might be the problem besides pump wear.
1. input gear/cam gear wear?
2. oring seals bad in the pump.
I'm not sure if either of this could cause a noisy pump, buit if they could, I'd like to investigate those before I go buying a new pump. I'm not sure what is required for pump removal, I'm sure it involves those nice little gasket things, haha. It's not a major concern, just wanted to get your ideas on it. I will see about borrowing my friends voice recorder to get a few files of sound for you guys to hear so I can get your input. What I'm asking is all pump noise caused from pump wear?
As for the filter, It's rated 25GPM and is a 25micron filter, much better then the brass screen. I could get a 10micron to put on there, but seems it woulkd clogg up faster and restrict flow more easily.
Thanks

Replies:

• Re: Got the 300u going, but... Unreserved dick 14:36:26 02/12/07 (0)

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