power steering pump

(quoted from post at 15:58:42 02/03/21) Hi, my name is Jim, I own a 1955 850.
I bought the power steering and front axle off a salvage tractor. I took the advice of Ultradog Mn and procured these:
Column.
L&R adius rods.
L&R drag links.
Pump.
Waterneck with ear for belt adjuster.
Turnbuckle belt adjuster.
2 hyd cylinders.
2 hyd lines from pump to column.
4 hyd lines from column to cylinders.
Pully Crankshaft

While viewing product documentation at the CNH site I have been referring to model 2030 because the front axle and power steering are accurate regarding what I purchased.
The PO said the power steering was working the last he used the tractor. The pump was off the tractor when I bought it and it had no pulley on the shaft but rolled over smoothly.


When I disassembled the power steering pump. I found water in the pump.

I do not notice any pitting, but there is black coloring on the casting faces, shaft, rotor, oval insert and roller vanes. I am tempted to clean off the corrosion before reassembly.
For reference the cover is marked EATON

Here is what I see



Have you disassembled your steering pump?
Do you have any experience dealing with internal corrosion on the power steering pump?
How did you resolve the condition?

Thank you in advance for any help you can give me.

Regards,
Jim

<img src="https://www.yesterdaystractors.com/cvphotos/cvphoto74058.jpg">

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<img src="https://www.yesterdaystractors.com/cvphotos/cvphoto74062.jpg">

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