Is the bloody vacuum chamber evacuator? I'm sitting here stuck because I can't discharge the system for air brake running.
Its on the right side of each cab. Be sure to close them after venting. (In the Real one its a bit lower, the red square is the position of the DSD hold over.) Another UK Diesel, created really nice by DTG, i like the features with the brake modes, exhausters etc.
Here a guide to change from "vacuum to air" & changing ends in Multiple operation (same as with single loco, except you dont have to care about lead /trail, compressor / exhauster at only one loco.)