To get to the Metro Subway Shoppes, we took mass transit. However the Metro and Light Rail lines do not have a direct connection. The best that is offered are two block long walking connections at Cultural Center / State Center and Lexington Market. Here we see Maryland LINK painted LRV #5019 dropping off tour participants at the Cultural Center station.
The Reisterstown Plaza station offers a sweeping curve west of the platform where one can get entire trainsets in the frame. A similar vantage is offered for eastbound trains at Millford Mill. The Metro runs with 4 or 6 car consists.
Here we see a diagram of the yard on the Yardmaster's console. The yard is a typical storage facility and shoppe combination, however there is a stub tail track at each end with access being provided via a number of main line connections on the north side. Long story short, you aren't getting out of the yard without at least one backup move.
We begin with the replacement truck storage area, which is currently sitting empty because truck rebuilding has been outsourced and most of the spare trucks were currently off property. The area is also equipped with a pair of lifts so that workers can get more easily to under-frame elements.
Spare motors, however, were on hand. They are of the DC variety in the 120hp range. Like the trucks, overhaul of the motors has also been outsourced to the same outfit that rebuild's WMATA's motors.
One thing the Metro Subway shoppe still rebuilds in house are the thyristor chopper motor controllers. By chopping a DC current, the apparent voltage is reduced and fine grain speed control is achievable with a solid state device. Much more efficient than cam controlled resistance drives, however still note the large heat sinks.
Heavy machinery abounds like this turret lathe.
Ground level spare DC motors (info) with the inspection plates removed to show the commutators. What's not to like about a motor system that is easily repairable with domestically sourced components!