UTS Hydraulic Pump

Chris Whitford · Jan 30, 2011

What is the correct pump for my 1949 UTS

It has one right now that makes good pressure, but doesn't match up with the 3 bolt flange that bolts to the back. The o-ring doesn't cover the pressure port well and I have a massive leak.

does anyone have part numbers for a Eaton/Charlynn or other brand that will bolt on and fit?

Thanks!

Alan K · Jan 30, 2011

I remember a parts man telling my dad years ago..If you have a round pump it is an Eaton brand, what they came with, and if it is kind of square it was a replacement Webster pump. I dont believe the flange and tube were the same between those pumps either. I have a parts book, Ill see if I can find some info....

Chris Whitford · Jan 30, 2011

Thanks for the help Alan! Any info you can find is much appreciated!

yonson · Feb 2, 2011

This info from "Uni-Matic" Power Repair Catalog R-1069G dated 11/55: Three different Eaton pumps were used, basically same design but different lengths depending on length of rotor assy. U & G models (1 1/2" long rotor assy., Eaton #ER1923), R & Z (1", Eaton #1903), smaller tractors (Avery)(1/2" long, Eaton #ER10361). You may not find these numbers on pump, the one on my ZA has none. The center housing containing the rotor, less end caps, for my 1" pump is 1 15/32" long so I assume pump for U would be 1/2" longer. And yes, the pump is basically round.

Chris Whitford · Feb 3, 2011

Thanks Yonson. I found a Minneapolis tag on my pump (it looks like its a Webster).

What's confusing is the pump seems like the right one, but the oil ports on the back don't quite line up with the factory Moline flange.

UTS Hydraulic Pump

Chris Whitford

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