Chapter 4
STOPPING PROCEDURE FOR
WDG4/WDP4 DIESEL ENGINE
4.1 Engine Stopping System
The normal way to shutdown a Diesel Engine is to cause the Engine
Governor to bring the fuel injector to the NO FUEL position. There are
several ways to cause the Governor to bring the fuel injectors to NO FUEL
position including operating the following switches:
1. EFCO/STOP: The Emergency Fuel Cutoff & Engine Stop push
Button switch mounted on the high voltage cabinet Engine control
panel in the cab.
2. EFCO 2: The emergency fuel cutoff push Button switch mounted on
the left side of the locomotive just above the fuel tank filler.
3. EFCO 3: The emergency fuel cutoff push button switch mounted on
the right side of the Locomotive just above the fuel tank filler.
4. MU ENG.STOP: The multiple Engine Stop/Run switch mounted on
the control console#2 pressing the STOP portion of this switch stops
all Engines in the consists. This is the result of the pickup of SDR
relay, when SDR is picked up, Governor DV solenoid energizes and
Fuel Rack comes to No Fuel position.
5. The Governor also brings the fuel injectors to the NO FUEL position,
if any of the following conditions is occurred:
Ÿ
Engine lube oil pressure is too low.
Ÿ
Engine lube oil is too Hot.
Ÿ
Engine coolant water pressure is too low.
Ÿ
Engine crank case pressure is too high.