
GP38/SD40 Locomotive Operating Manual
4
• Dynamic brake handle in OFF position –
a. Throttle can be moved to any position.
b. Reverser handle can be moved to any position if throttle is in IDLE position.
• Dynamic brake handle moved out of OFF position -
a. Throttle cannot be moved out of IDLE position into power positions.
b. Reverser handle cannot be placed in forward or reverse position.
INDICATING LIGHTS PANEL
• WHEEL SLIP Light
Indicates slipping wheels. (Differs from prototype function.)
• PCS OPEN Light
Comes on to indicate a safety control or emergency air brake application. The pneumatic
control switch PCS functions to automatically cut power to the traction motors in the
event of a safety control or emergency air brake application.
Locomotive power is restored by resetting of the PCS switch. This occurs automatically,
provided that:
1. Control of the air brake is recovered.
2. The throttle is returned to IDLE position.
• BRAKE WARN Light
Indicates the application of any brake.
(Differs from prototype function. There it indicates excessive dynamic braking current.)
• SAND Light
Indicates the "SANDING" state
• WSD DEF Light
Currently no function
LIGHT SWITCHES
• Gauges lights switch
Turns the display illumination on/off
• Cabin light switch
Turns the cabin interior lights on/off
• Step lights switch
Turns the outside step and walkway lights on/off
Just click with the moue onto the switches. You don't need to drag the mouse.
HEADLIGHT SWITCH
Controls the headlights of the loco. Has three positions Off/Medium/Bright. The switching between
front/rear lights occurs automatically in
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