WITH gearbox, those repairing a 10EE with an outright missing motor - or VFD-borked - 10EE being put back "right" .... are still few and far between.
WITHOUT gearbox? I've bought three motors, helped ship another, traded one away - but all this transpiring over a period of nearly ten years.
I had a gearbox from a part-out. Round-dial-era, keyed-shaft type. So one of my "large-frame" 3 HP was bought "naked" .. for about $200.
And a splined-shaft WiaD era "small frame" 3 HP with NO gearbox was sent-away to another PM'er who had a gearbox but a fried motor.
Time it takes to move these puppies is largely about the GEARBOX! Then shipping cost or go-fetch practicality.
The "large frame" 3 HP Reliance otherwise seems to last near-as-dammit "forever", so - what with "optimists" doing VFD downgrades - there just might be more of them at-large than empty-bellied 10EE to house them?
Mayhap I should add an elevator to this 3-level-split for me Old OLD age?
'Coz it IS an elevator motor! Looong-years proven .... before ever it crawled into the belly of a 10EE...
The "MG" units need but a 5 to 7.5 HP RPC and away they go. We have even had one "optimist" or two who have run them off 5 HP static (alleged) converters. At least three have had their OEM AC input motor re-connected to the Steelman-Hass single-phase solution and do not even need a phase converter.
MG or any OTHER 10EE with any of the OEM DC motors can shed EVERYTHING BUT the final-drive motor - EVERY OTHER bit of wire, relays, contactors, rheostats, braking resistors - no exceptions - is no longer a proper fit and can be shed outright ... to run off a (Eurotherm) Parker 4Q 514-C-16 DC Drive from single-phase 240 VAC - drawing but 15 A to 20 A at the wall.
Putting a solid-state drive in place is near-zero mechanical or machining work, no motor, gearbox, nor mount alteration - and less that ten percent the total count of wires and terminations as OEM. No relays. No contactors. No resistors. NADA!
NEW low-voltage controls can be put anywhere - same as a VFD's controls can be.
But there are plenty of ways to run an MG-era 10EE in a single-phase environment. WiaD and Modular are ALREADY single-phase, of course.