SD70M operator's guide

This is a short guide to operate the SD70M locomotive in the RunOnRails train simulator.

Engine start procedure for lead unit

1. CONTROL AND FUEL PUMP switch in the control stand is in the ON (up) position.
2. GENERATOR FIELD in the control stand is in the OFF (down) position.
3. ENGINE RUN in the control stand is in the OFF (down) position.
4. ISOLATION SWITCH in the back panel in START position.
5. Press START SWITCH in the back panel, wait until diesel engine starts up.
6. Place the ISOLATION SWITCH in the back panel to the RUN position.
7. Place the GENERATOR FIELD switch in the control stand to the ON (up) position.
8. Place the ENGINE RUN switch in the control stand to the ON (up) position.
9. Configure the BRAKE PIPE CUTOFF in the command board to the FREIGHT or PASSENGERS position as required.
10. Move the DYNAMIC BRAKE switch in the control stand to the ON (up) position.
11. Move the DYNAMIC BRAKE switch in the back panel to the CUT IN position.

Engine start procedure for trailing units

1. CONTROL AND FUEL PUMP switch in the control stand is in the OFF (down) position.
2. GENERATOR FIELD in the control stand is in the OFF (down) position.
3. ENGINE RUN in the control stand is in the OFF (down) position.
4. ISOLATION SWITCH in the back panel in START position.
5. Press START SWITCH in the back panel, wait until diesel engine starts up.
6. Place the ISOLATION SWITCH in the back panel to the RUN position.
7. Move the DYNAMIC BRAKE switch in the control stand to the ON (up) position.
8. Move the DYNAMIC BRAKE switch in the back panel to the CUT IN position.
9. Move the INDEPENDENT BRAKE lever to RELEASE position.

Check the command board:

• THROTTLE lever is in IDLE position.
• REVERSER handle is in NEUTRAL position.
• BRAKE PIPE CUTOFF is in the TRAILING (TRL) position.
• AUTOMATIC BRAKE is in the HOLD OFF (HO) position.

Engine stop procedure for all units

1. Press EFCOS/ENGINE STOP in the back panel.
2. Place the ISOLATION SWITCH in the back panel to the STOP position.
3. Place all switches in the control stand to the OFF (down) position.
4. Move THROTTLE lever to IDLE.
5. Move REVERSER handle to NEUTRAL.
6. Move the INDEPENDENT BRAKE lever to FULL position.
7. Move AUTOMATIC BRAKE lever to HOLD OFF (HO) position.
8. Move the BRAKE PIPE CUTOFF in the command board to TRAILING (TRL) position.

Start the train

• Move the REVERSER handle forward or reverse, as required.
• Move the AUTOMATIC BRAKES lever to RELEASE (REL) position.
• Move the INDEPENDENT BRAKE lever to RELEASE (REL) position.
• Open the THROTTLE one notch at a time, keeping the speed at a minimum until all slack has been removed. Reduce throttle if acceleration is excessive.
• Continue opening throttle progressively until the required speed is reached.

With the REVERSER handle centered, mechanical interlocking prevents movement of the THROTTLE and DYNAMIC BRAKE handle.

Automatic brakes

This locomotive is equipped with the 26-L Westinghouse automatic air brakes. This is a standard braking equipment.

Stop the train with automatic brake application

• Move the THROTTLE lever to IDLE position.
• Slowly regulate AUTOMATIC BRAKE lever between MINIMUM REDUCTION (MIN) and FULL SERVICE (FS) positions, while looking at the EQUALIZING RESERVOIR pressure indicator to know the pressure reduction you are requesting. Remember that a reduction in brake pipe pressure increases the braking.
• Look at BRAKE PIPE pressure indicator to know the current brake pipe pressure on the locomotive.
• Look at BRAKE PIPE pressure indicator on the END OF TRAIN receiver to know the current brake pipe pressure on the last car. The longer the train, the longer it takes to equalize pressure across the train.
• The BRAKE CYLINDER indicator gives information about the pressure that is currently being exerted on the wheels. Note that this indicator only displays the locomotive BC, you have no information about the pressure being exerted on other cars.

Automatic brake release

• Move the AUTOMATIC BRAKE lever to RELEASE (REL) position. This will restore the pressure to the brake pipe across the train.
• An increase of the brake pipe pressure quickly releases the brakes. Look at the END OF TRAIN receiver to know when the BP pressure increases on the last car, and therefore its brakes are released.
• When automatic brakes are released, auxiliary reservoirs in all train vehicles begin to fill to full pressure. This takes time. You can know when all the auxiliary reservoirs are full, by looking at the AFM indicator, that shows the air entering to the brake pipe from the locomotive main reservoir. When this indicator is zero, all the auxiliary reservoirs are full and the brake pipe pressure is restored.
• Note that if AFM is not zero, you have not enough pressure on auxiliary reservoirs to perform a full brake application.

Emergency brake

To apply emergency brake, move the AUTOMATIC BRAKE lever to EMERGENCY position (full forward).

To recover from an emergency application:

1. Move THROTTLE lever to IDLE position.
2. Move REVERSER handle to NEUTRAL.
3. Move AUTOMATIC BRAKE lever to SUPPRESSION (SUP) position.
4. Wait for at least 1 minute.
5. Move AUTOMATIC BRAKE lever to RELEASE.