320C Excavator Caterpillar

Illustration 1	g00682219

Engine Speed - Turn the engine speed dial in order to control the engine speed (engine rpm). Select the desired position from the ten available positions. The selected position of the engine speed dial is indicated on the electronic monitor panel.

Illustration 2	g00684599

Decrease - Turn the engine speed dial counterclockwise in order to decrease the engine speed (engine rpm).

Increase - Turn the engine speed dial clockwise in order to increase the engine speed (engine rpm).

Backup Method for Controlling Engine Speed

If the control system does not work due to a malfunction and the engine speed cannot be adjusted by the engine speed dial, the following method will allow you to adjust the engine speed temporarily. Make repairs as soon as possible.

Check the message display for any error messages. If the error message "ECM ERROR" is displayed, there is a problem in the electronic controller. See Operation and Maintenance Manual, "Backup Controls".

If the engine speed cannot be adjusted by the engine speed dial and the indicator for the electronic controller does not come on, see Operation and Maintenance Manual, "Backup Controls".

If you cannot adjust the engine speed, the motor for the governor is probably malfunctioning. Use the following backup method to adjust the engine speed.

Note: Even if you cannot control the engine speed, you can turn the engine on and off with the engine start switch.

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Illustration 3	g00101564

1. Stop the engine after you place the machine in the servicing position, as shown.

2. Open the engine hood.

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Illustration 4	g00682220

3. To increase the engine speed, loosen locknut (1) of the decelerator cable completely to the end of the threads. Use a 14 mm spanner.

4. Loosen locknut (2) of the accelerator cable completely to the end of the threads. Use a 14 mm spanner.

5. Tighten adjusting nut (4) clockwise so that lever (3) contacts the stopper. The engine will run at maximum speed at this setting.

6. Secure the lever at the maximum speed position by tightening locknut (2) and adjusting nut (4) .

   Note: The engine speed will rapidly reach high idle or a similar speed when you start the engine.

   To decrease the engine speed, repeat the procedure above, but turn adjusting nut (4) counterclockwise in order to set the lever at a lower speed position.

7. Close the engine hood.