Free for Shipping: Monarch 10ee Ruthman D-500 Coolant Pump 3ph

Hi,
Removed a Rumaco D-500 coolant pump (3ph 1/10hp) from a 1962 Modular 10ee.



Pump was originally non-functional, leads had shorted due to insulation failure and impeller was frozen.

Cleaned / de-rusted, and soldered on new leads and added insulation varnish to motor windings, tested motor and runs fine on a VFD I have lying around. Bearings are shielded / sealed type and smooth.

However, in the meantime I got a replacement single-phase pump, so I don't need this one.

So, this is free to anyone who wants to pick it up (northern NJ) or who wants to pay shipping (about 15lbs?). However, caveats are:

- not sure how durable the electrical repair is? It may fail again.
- motor shaft was somewhat pitted from rust, may affect the pump seal effectiveness?
- needs new pump seal, old one was badly damaged and was pressed out. Apparently these are available, is a 1/2" type 6A. Gusher part 84084. Also possibly a US Seal P/N PS-165 (around $35).

Currently wired for 208v 3ph.

Otherwise it's off to the scrap yard.

What did you use for the single phase replacement?

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jerholz said:

What did you use for the single phase replacement?

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Click to expand...

I bought a Flair suction-type pump:

KBC,1PH 110/220V SELF-CONTAINED COOLANT PUMP,1-456-035,KBC Tools & Machinery

Haven't tried it yet, but it fits in the coolant pump area and should work.
Bolt hole circle isn't quite right for the existing mounting holes, but quite close, enlarging the mounting holes a bit was sufficient.

-Phil