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released, the deadman must close the valve within 5 seconds.
This valve is
connected to the pantograph system and is hydraulically operated.
10.3.24.5.5. Emergency Shut-Off Valve (136AF-9B). Check solenoid operation, DP
control, and quick-closing feature. Verify valve closes within 10 seconds. Solenoids are
energized except during power failures or when the ESO switch is activated. The typical
setting for the differential control is approximately 7 psi.
10.3.24.5.6. Flush Valve (136AF-5A). Check solenoid operation and quick-closing feature.
Solenoid is de-energized when the system is placed in pantograph flush.