Installation and Programming That Is Based on The Questionnaire Response
| Question | Response |
| The operator of the PTO needs to control the engine rpm. Determine the location on the vehicle. Determine if the operator of the PTO needs to continually vary the engine rpm. Determine if a foot accelerator is necessary. Determine if a hand accelerator is necessary. This determines the programming of the "PTO configuration". |
If the operator of the PTO will be operating the PTO from the cab, then program the "PTO configuration" to "cab switches". If the operator of the PTO will be outside of the cab, then program the "PTO configuration" to either "remote switches" or to "remote throttle". If the operator of the PTO will be continually varying the engine rpm by using a foot accelerator or a hand accelerator, then program the "PTO configuration" to "remote throttle". Otherwise, program the "PTO configuration" to "remote switches". If operation of the PTO in the cab or out side of the cab is required, then the following components are used for the control of the PTO in the cab: The Cruise Control On/Off switch, the Cruise Control Set/Resume switch, the Cab Accelerator Pedal, or the Fast Idle switch are needed. The remote "PTO configuration" should be used for outside cab control. The "PTO configuration" should be programmed to either "remote switches" or "remote throttle". |
| Determine the maximum vehicle speed for the PTO operation. Determine if the PTO operation requires the use of the clutch and the service brakes without changing the engine rpm. This determines the programming of the "PTO Vehicle Speed Limit". This also determines if an additional switch is necessary in order to prevent the movement of the brake pedal and the movement of the clutch from returning the engine rpm to programmed low idle rpm. |
Program the "PTO Vehicle Speed Limit" to the value that is needed. If the PTO is driven by the transmission and a high vehicle speed results, then this parameter can be set to avoid a disconnection of the vehicle speed circuit. Refer to the appropriate diagrams for the application if the operation requires feathering out the service brakes or the clutch in order to adjust the vehicle speed. A set engine rpm is also maintained at the same time. Refer to the PTO Service Manual, "Cab Switches with Torque Limiting and Ignore Brake/Clutch Switch" for more information if the "PTO configuration" is programmed to "cab switches". If the "transmission style" is programmed to "Automatic Option 3" and "Automatic Option 4", and a neutral switch is used, then necessary measures must be taken in order to prevent the neutral switch from disengaging the PTO operation when the transmission is in gear. |
| Determine the torque value that is maximum for the equipment when the circuit for the PTO is ON. This determines the programming of the "torque limit". |
Program the parameter for the "Torque Limit" to this value. NOTE: The programmed torque limit is an estimate. To determine actual torque output, test the engine on a dynamometer. |
| Determine if a torque limit is also required for the temporary protection of equipment. This is determined for the instance when the PTO On/Off Circuit is in the OFF position. This determines if a Torque Limit switch is necessary. |
Refer to the appropriate schematic for the application if the torque limit is required. This may be required for the instance when the PTO is OFF. Refer to the PTO Service Manual, "Cab Switches with Torque Limiting and Ignore Brake/Clutch Switch" if the "PTO configuration" is programmed to "cab switches". If the "PTO configuration" is programmed to "Remote Switches", then refer to PTO Service Manual, "Remote Switches with Torque Limiting and Ignore Brake/Clutch Switch". |
| Determine if one or more fixed engine rpm above low idle is required. Determine the first engine rpm. Determine the second engine rpm. This determines the programming of the "PTO Engine RPM Set Speed" and the "PTO TEL" parameters for a dedicated PTO. Determine that the engine rpm needs to accelerate to the first engine rpm at the instant when the PTO On/Off switch is turned ON. This determines the programming of the PTO in relation to the Set Speed parameter for a dedicated PTO. This also determines if a second switch is required for control of the engine rpm. |
If only one rpm above low idle is required, program the "PTO TEL" and "PTO Engine RPM Set Speed" to the same rpm. If two rpm are desired, then program the "PTO Engine RPM Set Speed" to the first rpm value. Program the "PTO TEL" to the second rpm. Program the "PTO to Set Speed" to YES if the engine should accelerate to the first engine rpm point. This occurs when the PTO On/Off switch is turned ON. NOTE: The "PTO Engine RPM Set Speed A" and the "PTO Engine RPM Set Speed B" is another option. Refer to PTO Service Manual, "Multiple Speed PTO Operation" for more information. |
| Determine if the control for the engine rpm is required from both the cab and outside of the cab. Determine the points for operating speed if control for the engine rpm is required in both locations. |
This requires the use of parameters for a Dedicated PTO that is operated outside of the cab. The accelerator position sensor that is in the cab, the Cruise Control On/Off Switch, and the Cruise Control Set/Resume Switch are also needed for operation from the cab. Program the "Idle RPM Limit" for the use of the Cruise Control Switches. Program the Dedicated PTO parameters for operation outside the cab. |
| Determine the engine rpm that is maximum for the PTO in operating conditions. Determine if the accelerator pedal should have limited rpm. This determines the programming of the "Top PTO Engine RPM Limit" and the "PTO Cab Controls RPM Limit". |
Program the "Top PTO Engine RPM Limit" to this rpm. The answer to this question will determine whether the "PTO Cab Controls RPM Limit" should be programmed to "Low Idle", "TEL", or "PTO TEL" if the "PTO Configuration" is programmed to the "Cab Switches". NOTE: The accelerator pedal is ignored in the PTO. |
| Determine the necessary time in order for the engine to accelerate and decelerate to the engine rpm set points and from the engine rpm set points. NOTE: Acceleration rates and deceleration rates are measured in rpm/sec. This determines the programming of the "Idle/PTO Ramp Rate" that is measured in rpm/sec. |
This parameter may be programmed after demonstrating some different settings to the customer. |
Programming the Parameters
Programming the parameters requires an Electronic Service Tool. Customer Passwords are required to change the current settings for the programmable parameters if the customer passwords have been set. Availability of some of the parameters depends on the programming of other parameters. Program the Parameter for the "PTO Configuration" before attempting to program any of the "Dedicated PTO" parameters. Failure to program the Parameter for the "PTO Configuration" first will cause the remaining "Dedicated PTO" parameters to display "Unavailable" on the Electronic Service Tool Configuration Screen.
Programming Provisions
The following parameters or the operation of the following parameters are affected by other parameters.
"PTO Configuration" - The Parameter for the PTO Configuration must be programmed first in order to meet the requirements for the PTO Parameters that are Dedicated. No other parameter can be programmed first in order to allow programming of other Dedicated PTO Parameters.
"PTO TEL" - The "PTO TEL" should be programmed above the programmed Low Idle.
"PTO Engine RPM Set Speed" - The PTO Engine RPM Set Speed disables the "Idle/PTO Bump RPM" for the PTO operation.
"PTO Engine RPM Set Speed A" - "Input 7" must be programmed to "PTO Engine RPM Set Speed A" and a dedicated switch must be installed in order for the engine to operate at the desired speed for this parameter.
"PTO Engine RPM Set Speed B" - "Input 19" must be programmed to "PTO Engine RPM Set Speed B" and a dedicated switch must be installed in order for the engine to operate at the desired speed for this parameter.
"PTO to Set Speed" - The "PTO to Set Speed" requires the "PTO Engine RPM Set Speed" to be programmed to an engine rpm above low idle. The "PTO Configuration" must be programmed to "Cab Switches" or to "Remote Switches".
"PTO Cab Controls RPM Limit" - The "PTO Cab Controls RPM Limit" is used only if the "PTO Configuration" is programmed to "Cab Switches". The cab accelerator position sensor is always limited to low idle when the PTO On/Off circuit is ON and the "PTO Configuration" has been programmed to "Remote Switches" or "Remote Throttle".
"Torque Limit" - The "Torque Limit" can be programmed to values above the Rated Torque of the engine. However, the Rated Torque of the engine is the maximum torque of the engine.
"Cruise/Idle/PTO Switch Configuration" - The Set/Resume switch operates as an RPM Increase/RPM Decrease switch when the PTO On/Off switch is ON and the parameter for the "PTO Engine RPM Set Speed" is programmed. Placing the switch in the Set position will signal the ECM to increase the engine rpm. Placing the switch in the Resume position will signal the ECM to decrease the engine rpm.
"PTO Vehicle Speed Limit" - The park brake switch and the interlocks for the neutral switch are required in the circuit for the PTO On/Off Switch if the parameter for the "PTO Vehicle Speed Limit" is used in order to avoid the disconnection of the vehicle speed circuit. The requirement is because of the fact that the PTO is driven by the transmission in this instance.
"PTO Shutdown Time" - The timer will become active when the PTO is switched ON. The timer cannot be overridden if the "PTO Shutdown Time" has been programmed properly. The engine will shut down regardless of the load when the elapsed time equals the programmed value .