04-28-2019, 07:31 PM
Out with the old.....
And in with the new.
We spent a shortened work session today removing the old governor from the "B", crating it up as a core return, then installing the new one in it's place. When you look at the picture of the old one you will see a set of gauges near the top. Those are used in adjusting the injectors, it's an old way of doing a tune up on the 567 block that no one ever does any more.
The governor on a diesel locomotive is the brain of the engine control and MU system. It takes the throttle input from the engineer and sets the engines rpm to the correct notch. This is done by a group of wires (5 total ) that connect through the MU system so that all units in the consist react the same. Also on early EMD's the engineer can shutdown all units in MU from the throttle by moving it past the idle notch in the opposite direction from run 1 to 8. In case of a loss of throttle input, the governor will automatically drop the prime mover down to the idle rpm. Another feature unique to EMDs that's handled by the governor is the load regulator. It's a hydraulically controlled rheostat that weakens the field windings of the traction motors when starting from a dead stop. This gives a soft start effect to the train control, reducing the chance of a jolt and breaking the train in two. This feature can be cut out with a small modification for switching jobs when instant full power is needed.
Starting next week some track work will start on the tracks that lead into the restoration shop. All of the switches and most of the rail/ties will be replaced. This will make operations interesting as this project will take most of the summer.
And in with the new.
We spent a shortened work session today removing the old governor from the "B", crating it up as a core return, then installing the new one in it's place. When you look at the picture of the old one you will see a set of gauges near the top. Those are used in adjusting the injectors, it's an old way of doing a tune up on the 567 block that no one ever does any more.
The governor on a diesel locomotive is the brain of the engine control and MU system. It takes the throttle input from the engineer and sets the engines rpm to the correct notch. This is done by a group of wires (5 total ) that connect through the MU system so that all units in the consist react the same. Also on early EMD's the engineer can shutdown all units in MU from the throttle by moving it past the idle notch in the opposite direction from run 1 to 8. In case of a loss of throttle input, the governor will automatically drop the prime mover down to the idle rpm. Another feature unique to EMDs that's handled by the governor is the load regulator. It's a hydraulically controlled rheostat that weakens the field windings of the traction motors when starting from a dead stop. This gives a soft start effect to the train control, reducing the chance of a jolt and breaking the train in two. This feature can be cut out with a small modification for switching jobs when instant full power is needed.
Starting next week some track work will start on the tracks that lead into the restoration shop. All of the switches and most of the rail/ties will be replaced. This will make operations interesting as this project will take most of the summer.
My other car is a locomotive, ARHS restoration crew