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PTO Configuration Test: Remote Switches (using Caterpillar ET Software)

Remote Switches

Figure 1.1 - Remote Switches (Increase/ Decrease)

1). Use CAT ET to Check the Programming of the Parameter Dedicated PTO Parameters.
→Connect CAT ET to the data link connector. Read More: How to Connecting Caterpillar ET Software to the ECM.
→Access the Dedicated PTO Parameters on CAT ET. Note the programming of the parameter PTO Configuration (Remote Switches). Read More: PTO Configurations for On-Highway Trucks (Caterpillar Engines).
Figure 1.2 - PTO Configuration (Remote Switches)

2). Check the Circuit for the PTO On/Off Switch.
→Activate the PTO operation.
→Access the CAT ET Status screens that display the following status parameters. Read More: Status Tool on Caterpillar ET Software.
  • PTO Config (Remote Switches)
  • PTO On/Off Switch
→Verify that each of the interlocks for the PTO are set. Then, while the CAT ET Status screen is being monitored, move the PTO On/Off Switch to the ON position and move the PTO On/Off Switch to the OFF position.
Figure 1.3 - PTO On/Off Switch (ON)

3). Check the Status of the Set/ Resume Input.
→View the Status parameter on CAT ET for the Remote PTO Set Switch and for the Remote PTO Resume Switch
→While the Status screen of CAT ET for the switch is being monitored, perform the following procedure in order:
-Put the Remote PTO Set/Resume Switch in the Set position. The status of the Remote PTO Set Switch changes from "OFF" to set switch "ON" when the Remote PTO Set Switch is moved to the SET position, and the Engine RPM will increase. 
Figure 1.4 - Remote PTO Set Switch (ON)
-Put the Remote PTO Set/Resume Switch in the Resume position. The Status of the Remote PTO Resume Switch changes from "OFF" to resume switch "ON" when the Remote PTO Resume Switch is moved to the RESUME position, and the Engine RPM will decrease.
Figure 1.5 - Remote PTO Resume Switch (ON)
-Also monitor the Status of the PTO Set RPM, will changes from 0 RPM to actual Engine Speed (will equal) and the PTO Kickout (Not Kicked Out).
Figure 1.6 - PTO Set RPM
-PTO Kickout value will changes to PTO Switch Turned Off when the PTO On/Off Switch is turned to the "OFF" position.
Figure 1.7 - PTO Kickout (PTO Switch Turned Off)

4). Monitor using the Real Time Graphing while simulate the PTO Configuration Test (Remote Switches). Read More: Real Time Graphing using Caterpillar ET Software.
Figure 1.8 - PTO Config (Remote Switches)

When the PTO Configuration is programmed to Remote Switches or to Remote Throttle and the PTO On/Off Switch is On, the following circuits are ignored:
• Service Brake Pedal Position Switch 1
• Service Brake Pedal Position Switch 2
• Clutch Pedal Position Switch
• Neutral Switch
• Accelerator Pedal Position Sensor
• Cruise Control Set/Resume Switch that is located in the Cab.


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