JD 420 with 90 loader hyd pump

General help and support for your Lindeman through 2010 John Deere crawler
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mc_mike
430 crawler
430 crawler
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Joined: Mon Nov 28, 2005 11:00 am
Location: Green Springs, Ohio

JD 420 with 90 loader hyd pump

Post by mc_mike » Mon Nov 28, 2005 7:29 pm

Does anyone know the specs & part number for the hyd. pump for a 420c with the 90 loader. Mine seems a little weak? I can't make the number out on the tag of the pump. I think it has been replaced. How much pressure should it be putting out? Any idea where I could get a rebuilt pump or a reasonable subsitute pump. Right now I can't lift more than a ton, and I can't pick the rear of the crawler off the ground. Please help.

Thanks,
Mike
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Lavoy
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Post by Lavoy » Mon Nov 28, 2005 9:25 pm

It is a Hydreco pump if it is original. About 15GPM at 1000 PSI I believe.
If you have counterweights, it should not be able to pick the back end of the crawler off the ground. If you can, you are grossly over pressure.
Lavoy
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