2-29. MULTIPLE-UNIT OPERATION (cont)
In multiple-unit operation, all connected locomotives are controlled from one cab. The controlling
locomotive is handled in the same manner as operating a single unit.
Make the following checks:
Set independent brake valve (6) to
RELEASE. Make a 10-psi (69 kPa)
valve (7). Ensure brakes on both
units set. Set automatic brake
valve to RELEASE. Ensure brakes
independent brake valve to FULL
Set throttle (4) to position 3. Ensure
both units increase in power. Set
throttle to IDLE.
Push sand control (11). Ensure
both units deliver sand to the rails.
Release handbrake (10) and operate as
Changing operating cab.
In the cab which has been controlling, set controls as follows:
Set throttle (4) to IDLE.
Set cutoff pilot valve (9) to OUT position.