C-10, C-12, 3406E, C-15, C-16 and C-18 Engines - Electronic PTO Installation and Application Caterpillar

The tables that follow list the following information: Sequence of events, Action that is taken by the Operator of the PTO and Position of the controlling equipment. The positions produce the resultant engine RPM within a specific programmed limit. The following components are used in order to provide a demonstration of the interaction of different systems: Cruise Control On/Off switch, PTO On/Off switch, Set/Resume switch, Fast Idle On/Off switch and Accelerator Pedal. Most systems will require only some of the components.

Note: Before performing each test, reset the parameters to the factory defaults. This will ensure that a parameter that was used for one test is not active for another test. The parameters that are given in the tables must be programmed in order to perform the tests.

The Three Programmable Engine Limits

Table 1

Parameter Programming for the Three Programmable Engine Limits
"PTO Configuration"	Cab Switches
"PTO TEL"	2000 rpm
"PTO Cab Controls RPM Limit"	PTO TEL
"Low Idle Engine RPM"	600 rpm
"Idle RPM Limit"	900 rpm
"TEL"	2120 rpm

Illustration 1	g00721156

Table 2

The Three Programmable Engine Limits
Frame 1 Refer to Illustration 1.
Controlling Equipment	Action that was taken by the Operator of the PTO	Result	Resultant Engine RPM
The Cruise Control switch is OFF. The PTO switch is OFF. The Set/Resume switch is OFF. The Accelerator Pedal is not depressed.	Park the vehicle with the engine at idle.	The engine is at the programmed Low Idle Engine RPM.	600 rpm

Illustration 2	g00721158

Table 3

The Three Programmable Engine Limits
Frame 2 Refer to Illustration 2.
Controlling Equipment	Action that was taken by the Operator of the PTO	Result	Resultant Engine RPM
The Cruise Control switch is OFF. The PTO switch is OFF. The Set/Resume switch is OFF. The Accelerator Pedal is fully depressed.	Fully depress the accelerator pedal.	The engine is limited by the programmed TEL. The TEL in this instance is 2120 rpm.	2120 rpm

Illustration 3	g00721159

Table 4

The Three Programmable Engine Limits
Frame 3 Refer to Illustration 3.
Controlling Equipment	Action that was taken by the Operator of the PTO	Result	Resultant Engine RPM
The Cruise Control switch is ON. The PTO switch is OFF. The Set/Resume switch is in the Set position. The Accelerator Pedal is fully depressed.	Place the Cruise Control switch to the ON position. Place the Set/Resume switch to the Set position.	The engine is limited by the programmed TEL which is 2120 rpm.	2120 rpm

Illustration 4	g00721160

Table 5

The Three Programmable Engine Limits
Frame 4 Refer to Illustration 4.
Controlling Equipment	Action that was taken by the Operator of the PTO	Result	Resultant Engine RPM
The Cruise Control switch is ON. The PTO switch is OFF. The Set/Resume switch is OFF. The Accelerator Pedal is released.	Release the Accelerator Pedal. Release the Set/Resume switch from the Set position.	The engine is at the programmed idle RPM Limit which is 900 rpm.	900 rpm

Illustration 5	g00721161

Table 6

The Three Programmable Engine Limits
Frame 5 Refer to Illustration 5.
Controlling Equipment	Action that was taken by the Operator of the PTO	Result	Resultant Engine RPM
The Cruise Control switch is ON. The PTO switch is ON. The Set/Resume switch is OFF. The Accelerator Pedal is released.	Turn the PTO On/Off switch to ON.	The engine will return to Low Idle Engine RPM because a PTO rpm has not been set. The PTO On/Off switch will override the Cruise Control On/Off switch. The "PTO Vehicle Speed Limit" must be higher than the actual vehicle speed.	600 rpm

Illustration 6	g00721162

Table 7

The Three Programmable Engine Limits
Frame 6 Refer to Illustration 6.
Controlling Equipment	Action that was taken by the Operator of the PTO	Result	Resultant Engine RPM
The Cruise Control switch is ON. The PTO switch is ON. The Set/Resume switch is in the Set position. The Accelerator Pedal is fully depressed.	Place the Set/Resume switch in the Set position and fully depress the accelerator pedal.	The engine is at the PTO TEL which is 2000 rpm.	2000 rpm

Illustration 7	g00721163

Table 8

The Three Programmable Engine Limits
Frame 7 Refer to Illustration 7.
Controlling Equipment	Action that was taken by the Operator of the PTO	Result	Resultant Engine RPM
The Cruise Control switch is ON. The PTO switch is ON. The Set/Resume switch is OFF. The Accelerator Pedal is released.	Release the Set/Resume switch. Release the accelerator pedal.	The engine will remain at the PTO TEL which is 2000 rpm.	2000 rpm

Illustration 8	g00721165

Table 9

The Three Programmable Engine Limits
Frame 8 Refer to Illustration 8.
Controlling Equipment	Action that was taken by the Operator of the PTO	Result	Resultant Engine RPM
The Cruise Control switch is OFF. The PTO switch is OFF. The Set/Resume switch is OFF. The Accelerator Pedal is released.	Turn the Cruise Control On/Off switch to the OFF position. Turn the PTO On/Off switch to the OFF position.	The engine will return to the Low Idle Engine RPM which is 600 rpm.	600 rpm

Engine Operation with "PTO Engine RPM Set Speed"

The parameter for the "PTO Engine RPM Set Speed" is useful only if one or two specific engine rpm above low idle is required. Program this parameter to the same value as the "PTO TEL" if ONLY one specific engine rpm above low idle is required.

This parameter determines the amount of engine rpm when the PTO On/Off switch is turned to the ON position. The parameter for the "PTO to Set Speed" must also be programmed to YES. If the "PTO to Set Speed" is programmed to NO, then this speed can be achieved by using the RPM Increase/RPM Decrease switch.

NOTE: The parameter for the "PTO Engine RPM Set Speed" can override the parameter for the "Idle/PTO Bump RPM". If the "PTO Engine RPM Set Speed" is programmed above 0 rpm, then the Set/Resume switch will function as the RPM Increase/RPM Decrease switch. This occurs when the PTO On/Off switch is ON.

"Example 1" illustrates PTO operation with two specific engine rpm above low idle. "Example 1" also illustrates the "PTO Engine RPM Set Speed". In this example, the "PTO Engine RPM Set Speed" is for applications that require engine operation at low idle, at an intermediate rpm, and at the "PTO TEL".

"Example 2" illustrates PTO operation with one specific engine rpm above low idle.

Example 1

Table 10

Example 1 of the Parameter Programming for the "PTO Engine RPM Set Speed"
"PTO Engine RPM Set Speed"	1500 rpm
"PTO TEL"	2000 rpm

Illustration 9	g00721167

Table 11

Example 1 of the "PTO Engine RPM Set Speed"
Frame 1 Refer to Illustration 9.
Controlling Equipment	Action that was taken by the Operator of the PTO	Result	Resultant Engine RPM
The PTO On/Off Switch is ON. The RPM Increase/Decrease switch is OFF.	Turn the PTO On/Off Switch to the ON position and leave the throttle at the low idle position.	The engine will remain at low idle, which is 600 rpm.	600 rpm

Illustration 10	g00721170

Table 12

Example 1 of the "PTO Engine RPM Set Speed"
Frame 2 Refer to Illustration 10.
Controlling Equipment	Action that was taken by the Operator of the PTO	Result	Resultant Engine RPM
The PTO On/Off Switch is ON. The RPM Increase/Decrease switch is set to Increase.	Turn the RPM Increase/Decrease switch to the Increase position.	There should be no change in engine rpm. The "PTO Engine RPM Set Speed" is programmed and the engine will not respond until the RPM Increase/Decrease switch is released.	600 rpm

Illustration 11	g00646885

Table 13

Example 1 of the "PTO Engine RPM Set Speed"
Frame 3 Refer to Illustration 11.
Controlling Equipment	Action that was taken by the Operator of the PTO	Result	Resultant Engine RPM
The PTO On/Off Switch is ON. The RPM Increase/Decrease switch is released.	Release the RPM Increase/Decrease switch.	The engine will ramp up to the "PTO Engine RPM Set Speed" which is 1500 rpm. This will happen only after the RPM Increase/Decrease switch is released.	1500 rpm

Illustration 12	g00646886

Table 14

Example 1 of the "PTO Engine RPM Set Speed"
Frame 4 Refer to Illustration 12.
Controlling Equipment	Action that was taken by the Operator of the PTO	Result	Resultant Engine RPM
The PTO On/Off Switch is ON. The RPM Increase/Decrease switch is set to Increase.	Turn the RPM Increase/Decrease switch to the Increase position.	There should be no change in engine rpm. The "PTO Engine RPM Set Speed" is programmed and the engine will not respond until the RPM Increase/Decrease switch is released.	1500 rpm

Illustration 13	g00721172

Table 15

Example 1 of the "PTO Engine RPM Set Speed"
Frame 5 Refer to Illustration 13.
Controlling Equipment	Action that was taken by the Operator of the PTO	Result	Resultant Engine RPM
The PTO On/Off Switch is ON. The RPM Increase/Decrease switch is released.	Release the RPM Increase/Decrease switch.	The engine will ramp up to the "PTO TEL", which is 2000 rpm. This will happen only after the RPM Increase/Decrease switch is released.	2000 rpm

Illustration 14	g00721174

Table 16

Example 1 of the "PTO Engine RPM Set Speed"
Frame 6 Refer to Illustration 14.
Controlling Equipment	Action that was taken by the Operator of the PTO	Result	Resultant Engine RPM
The PTO On/Off Switch is ON. The RPM Increase/Decrease switch is set to Decrease.	Turn the RPM Increase/Decrease switch to the Decrease position.	There should be no change in engine rpm. The "PTO Engine RPM Set Speed" is programmed and the engine will not respond until the RPM Increase/Decrease switch is released.	2000 rpm

Illustration 15	g00646889

Table 17

Example 1 of the "PTO Engine RPM Set Speed"
Frame 7 Refer to Illustration 15.
Controlling Equipment	Action that was taken by the Operator of the PTO	Result	Resultant Engine RPM
The PTO On/Off Switch is ON. The RPM Increase/Decrease switch is released.	Release the RPM Increase/Decrease switch.	The engine will ramp to the "PTO Engine RPM Set Speed", which is 1500 rpm. This will happen only after the RPM Increase/Decrease switch is released.	1500 rpm

Illustration 16	g00646890

Table 18

Example 1 of the "PTO Engine RPM Set Speed"
Frame 8 Refer to Illustration 16.
Controlling Equipment	Action that was taken by the Operator of the PTO	Result	Resultant Engine RPM
The PTO On/Off Switch is ON. The RPM Increase/Decrease switch is set to Decrease.	Turn the RPM Increase/Decrease switch to the Decrease position.	There should be no change in engine rpm. The "PTO Engine RPM Set Speed" is programmed and the engine will not respond until the RPM Increase/Decrease switch is released.	1500 rpm

Illustration 17	g00721176

Table 19

Example 1 of the "PTO Engine RPM Set Speed"
Frame 9 Refer to Illustration 17.
Controlling Equipment	Action that was taken by the Operator of the PTO	Result	Resultant Engine RPM
The PTO On/Off switch is ON. The RPM Increase/Decrease switch is released.	Release the RPM Increase/Decrease switch.	The engine will ramp to the programmed Low Idle Engine RPM, which is 600 rpm. This will happen only after the RPM Increase/Decrease switch is released.	600 rpm

Example 2

Table 20

Example 2 of the Parameter Programming for the "PTO Engine RPM Set Speed"
"PTO to Set Speed"	NO
"PTO Engine RPM Set Speed"	1500 rpm
"PTO TEL"	1500 rpm

Illustration 18	g00721177

Table 21

Example 2 of the "PTO Engine RPM Set Speed"
Frame 1 Refer to Illustration 18.
Controlling Equipment	Action that was taken by the Operator of the PTO	Result	Resultant Engine RPM
The PTO On/Off Switch is ON. The RPM Increase/Decrease switch is OFF.	Turn the PTO On/Off Switch to the ON position.	The engine will remain at low idle, which is 600 rpm.	600 rpm

Illustration 19	g00721178

Table 22

Example 2 of the "PTO Engine RPM Set Speed"
Frame 2 Refer to Illustration 19.
Controlling Equipment	Action that was taken by the Operator of the PTO	Result	Resultant Engine RPM
The PTO On/Off Switch is ON. The RPM Increase/Decrease switch is set to Increase.	Turn the RPM Increase/Decrease switch to the Increase position.	There should be no change in engine rpm. The "PTO Engine RPM Set Speed" is programmed and the engine will not respond until the RPM Increase/Decrease switch is released.	600 rpm

Illustration 20	g00646896

Table 23

Example 2 of the "PTO Engine RPM Set Speed"
Frame 3 Refer to Illustration 20.
Controlling Equipment	Action that was taken by the Operator of the PTO	Result	Resultant Engine RPM
The PTO On/Off Switch is ON. The RPM Increase/Decrease switch is released.	Release the RPM Increase/Decrease switch.	The engine will ramp up to the "PTO Engine RPM Set Speed", which is 1500 rpm. This will happen only after the RPM Increase/Decrease switch is released.	1500 rpm

Illustration 21	g00646898

Table 24

Example 2 of the "PTO Engine RPM Set Speed"
Frame 4 Refer to Illustration 21.
Controlling Equipment	Action that was taken by the Operator of the PTO	Result	Resultant Engine RPM
The PTO On/Off Switch is ON. The RPM Increase/Decrease switch is set to Increase.	Turn the RPM Increase/Decrease switch to the Increase position.	There should be no change in engine rpm. The "PTO Engine RPM Set Speed" is programmed. The engine will not respond until the RPM Increase/Decrease switch is released.	1500 rpm

Illustration 22	g00646897

Table 25

Example 2 of the "PTO Engine RPM Set Speed"
Frame 5 Refer to Illustration 22.
Controlling Equipment	Action that was taken by the Operator of the PTO	Result	Resultant Engine RPM
The PTO On/Off Switch is ON. The RPM Increase/Decrease switch is released.	Release the RPM Increase/Decrease switch.	There should be no change in engine rpm. The "PTO TEL" is programmed to the same rpm as the "PTO Engine RPM Set Speed", which is 1500 rpm.	1500 rpm

Illustration 23	g00646899

Table 26

Example 2 of the "PTO Engine RPM Set Speed"
Frame 6 Refer to Illustration 23.
Controlling Equipment	Action that was taken by the Operator of the PTO	Result	Resultant Engine RPM
The PTO On/Off Switch is ON. The RPM Increase/Decrease switch is set to Decrease.	Turn the RPM Increase/Decrease switch to the Decrease position.	There should be no change in engine rpm. The "PTO Engine RPM Set Speed" is programmed and the engine will not respond until the RPM Increase/Decrease switch is released.	1500 rpm

Illustration 24	g00721180

Table 27

Example 2 of the "PTO Engine RPM Set Speed"
Frame 7 Refer to Illustration 24.
Controlling Equipment	Action that was taken by the Operator of the PTO	Result	Resultant Engine RPM
The PTO On/Off Switch is ON. The RPM Increase/Decrease switch is released.	Release the RPM Increase/Decrease switch.	The engine will ramp to the programmed Low Idle Engine RPM, which is 600 rpm. This will happen only after the RPM Increase/Decrease switch is released.	600 rpm

Engine Operation with "PTO to Set Speed"

The engine will accelerate to the "PTO Engine RPM Set Speed" when the "PTO to Set Speed" parameter is programmed to YES. The PTO On/Off switch must be ON. This is useful for applications that require only one specific engine rpm above low idle. Only one circuit is required.

Table 28

Parameter Programming for "PTO to Set Speed Engine Operation"
"PTO to Set Speed"	YES
"PTO Engine RPM Set Speed"	1500 rpm

Illustration 25	g00721181

Table 29

"PTO to Set Speed Engine Operation"
Frame 1 Refer to Illustration 25.
Controlling Equipment	Action that was taken by the Operator of the PTO	Result	Resultant Engine RPM
The PTO On/Off switch is OFF. The Set/Resume switch is set to OFF.	Start the engine.	The engine is at the programmed low idle of 600 rpm.	600 rpm

Illustration 26	g00646904

Table 30

"PTO to Set Speed Engine Operation"
Frame 2 Refer to Illustration 26.
Controlling Equipment	Action that was taken by the Operator of the PTO	Result	Resultant Engine RPM
The PTO On/Off Switch is ON. The Set/Resume switch is set to OFF.	Turn the PTO On/Off Switch to the ON position.	The engine will ramp to the programmed "PTO Engine RPM Set Speed".	1500 rpm

Multiple Speed PTO Operation by Using the "PTO Engine RPM Set Speed A" and "PTO Engine RPM Set Speed B"

"Input 7" and "Input 19" are provided for the connection of the dedicated switches for the multiple speed PTO operation. "Input 7" can be programmed to "PTO Engine RPM Set Speed A". "Input 19" can be programmed to "PTO Engine RPM Set Speed B". A desired engine rpm can then be programmed for each input ("PTO Engine RPM Set Speed A" and "PTO Engine RPM Set Speed B").

Perform the following functions so that the engine will proceed to the corresponding rpm that is programmed for the "PTO Engine RPM Set Speed A" or "PTO Engine RPM Set Speed B":

• Turn the PTO On/Off Switch to the ON position.

• Turn the switch for the "PTO Engine RPM Set Speed A" or the PTO Engine RPM Set Speed "B" to the ON position.

If both switches are ON, the engine will proceed to "PTO Engine RPM Set Speed A" because the "PTO Engine RPM Set Speed A" has priority over "PTO Engine RPM Set Speed B". If switch "A" is then turned OFF, the engine will proceed to the programmed "PTO Engine RPM Set Speed B". If switch "A" is then turned ON, then the engine will proceed back to the "PTO Engine RPM Set Speed A". If both switches are in the OFF position, then the engine will return to Low Idle.

Example 1

Table 31

Example 1 of the Parameter Programming for the "Multiple Speed PTO Operation" by Using the "PTO Engine RPM Set Speed A" and "PTO Engine RPM Set Speed B"
"PTO Engine RPM Set Speed A"	1500 rpm
"PTO Engine RPM Set Speed B"	1200 rpm

Illustration 27	g00721184

Table 32

Example 1 for the "Multiple Speed PTO Operation" by Using the PTO Engine RPM Set Speed "A" and PTO Engine RPM Set Speed "B"
Frame 1 Refer to Illustration 27.
Controlling Equipment	Action that was taken by the Operator of the PTO	Result	Resultant Engine RPM
The PTO On/Off Switch is OFF. The PTO Engine RPM Set Speed "A" is OFF. The PTO Engine RPM Set Speed "B" is OFF.	Start the engine.	The engine is at the programmed low idle of 600 rpm.	600 rpm

Illustration 28	g00721185

Table 33

Example 1 for the "Multiple Speed PTO Operation" by Using the PTO Engine RPM Set Speed "A" and PTO Engine RPM Set Speed "B"
Frame 2 Refer to Illustration 28.
Controlling Equipment	Action that was taken by the Operator of the PTO	Result	Resultant Engine RPM
The PTO On/Off Switch is ON. The PTO Engine RPM Set Speed "A" is OFF. The PTO Engine RPM Set Speed "B" is OFF.	Turn the PTO On/Off Switch to the ON position.	The engine is at the programmed low idle of 600 rpm.	600 rpm

Illustration 29	g00648610

Table 34

Example 1 for the "Multiple Speed PTO Operation" by Using the PTO Engine RPM Set Speed "A" and PTO Engine RPM Set Speed "B"
Frame 3 Refer to Illustration 29.
Controlling Equipment	Action that was taken by the Operator of the PTO	Result	Resultant Engine RPM
The PTO On/Off Switch is ON. The PTO Engine RPM Set Speed "A" is ON. The PTO Engine RPM Set Speed "B" is OFF.	Turn the PTO On/Off Switch to the ON position. Turn the PTO Engine RPM Set Speed "A" to the ON position.	The engine is now at the programmed PTO Engine RPM Set Speed "A".	1500 rpm

Illustration 30	g00648612

Table 35

Example 1 for the "Multiple Speed PTO Operation" by Using the PTO Engine RPM Set Speed "A" and PTO Engine RPM Set Speed "B"
Frame 4 Refer to Illustration 30.
Controlling Equipment	Action that was taken by the Operator of the PTO	Result	Resultant Engine RPM
The PTO On/Off Switch is ON. The PTO Engine RPM Set Speed "A" is ON. The PTO Engine RPM Set Speed "B" is ON.	Turn the PTO Engine RPM Set Speed "B" to the ON position.	The engine will remain at the programmed PTO Engine RPM Set Speed "A". NOTE: Set Speed "A" has priority over Set Speed "B".	1500 rpm

Illustration 31	g00648614

Table 36

Example 1 for the "Multiple Speed PTO Operation" by Using the PTO Engine RPM Set Speed "A" and PTO Engine RPM Set Speed "B"
Frame 5 Refer to Illustration 31.
Controlling Equipment	Action that was taken by the Operator of the PTO	Result	Resultant Engine RPM
The PTO On/Off Switch is ON. The PTO Engine RPM Set Speed "A" is OFF. The PTO Engine RPM Set Speed "B" is ON.	Turn the PTO Engine RPM Set Speed "A" to the OFF position.	The engine will go to the programmed PTO Engine RPM Set Speed "B".	1200 rpm

Illustration 32	g00648617

Table 37

Example 1 for the "Multiple Speed PTO Operation" by Using the PTO Engine RPM Set Speed "A" and PTO Engine RPM Set Speed "B"
Frame 6 Refer to Illustration 32.
Controlling Equipment	Action that was taken by the Operator of the PTO	Result	Resultant Engine RPM
The PTO On/Off Switch is ON. The PTO Engine RPM Set Speed "A" is ON. The PTO Engine RPM Set Speed "B" is ON.	Turn the PTO Engine RPM Set Speed "A" to the ON position.	The engine is at programmed PTO Engine RPM Set Speed "A". NOTE: Set Speed "A" has priority over Set Speed "B".	1500 rpm

Illustration 33	g00721612

Table 38

Example 1 for the "Multiple Speed PTO Operation" by Using the PTO Engine RPM Set Speed "A" and PTO Engine RPM Set Speed "B"
Frame 7 Refer to Illustration 33.
Controlling Equipment	Action that was taken by the Operator of the PTO	Result	Resultant Engine RPM
The PTO On/Off Switch is OFF. The PTO Engine RPM Set Speed "A" is ON. The PTO Engine RPM Set Speed "B" is ON.	Turn the PTO On/Off Switch to the OFF position.	The engine is at the programmed low idle of 600 rpm.	600 rpm

Illustration 34	g00648618

Table 39

Example 1 for the "Multiple Speed PTO Operation" by Using the PTO Engine RPM Set Speed "A" and PTO Engine RPM Set Speed "B"
Frame 8 Refer to Illustration 34.
Controlling Equipment	Action that was taken by the Operator of the PTO	Result	Resultant Engine RPM
The PTO On/Off Switch is ON. The PTO Engine RPM Set Speed "A" is ON. The PTO Engine RPM Set Speed "B" is ON.	Turn the PTO On/Off Switch to the ON position.	The engine is at programmed PTO Engine RPM Set Speed "A". NOTE: Set Speed "A" has priority over Set Speed "B".	1500 rpm

Example 2

The switches for the "PTO Engine RPM Set Speed A" or "PTO Engine RPM Set Speed B" can also be used in conjunction with other features that control engine speed during PTO operation. Set Speed "A" and Set Speed "B" have priority over all of the other features that are used to adjust engine rpm. Table 40 describes the interaction between the parameter for the PTO to Set Speed and the parameter for the PTO Engine RPM Set Speed. The parameter for the PTO to Set Speed is programmed to YES.

Note: The feature for the "PTO Engine RPM Set Speed" is not available for the "Remote Throttle PTO Configuration". The "PTO Engine RPM Set Speed A" and the "PTO Engine RPM Set Speed B" are available for all three PTO configurations.

Table 40

Example 2 for the Parameter Programming for the "Multiple Speed PTO Operation" by Using the "PTO Engine RPM Set Speed A" and "PTO Engine RPM Set Speed B"
"PTO to Set Speed"	Yes
"PTO Engine RPM Set Speed"	1000 rpm
PTO Engine RPM Set Speed "A"	1500 rpm
PTO Engine RPM Set Speed "B"	1200 rpm

Illustration 35	g00721613

Table 41

Example 2 for the "Multiple Speed PTO Operation" by Using the "PTO Engine RPM Set Speed A" and "PTO Engine RPM Set Speed B"
Frame 1 Refer to Illustration 35.
Controlling Equipment	Action that was taken by the Operator of the PTO	Result	Resultant Engine RPM
The PTO On/Off Switch is OFF. The "PTO Engine RPM Set Speed A" is OFF. The "PTO Engine RPM Set Speed B" is OFF.	Start the Engine.	The engine is at the programmed low idle of 600 rpm.	600 rpm

Illustration 36	g00648654

Table 42

Example 2 for the "Multiple Speed PTO Operation" by Using the "PTO Engine RPM Set Speed A" and "PTO Engine RPM Set Speed B"
Frame 2 Refer to Illustration 36.
Controlling Equipment	Action that was taken by the Operator of the PTO	Result	Resultant Engine RPM
The PTO On/Off Switch is ON. The "PTO Engine RPM Set Speed A" is OFF. The "PTO Engine RPM Set Speed B" is OFF.	Turn the PTO On/Off Switch to the ON position.	The engine is at the programmed PTO Engine RPM Set Speed of 1000 rpm.	1000 rpm

Illustration 37	g00648656

Table 43

Example 2 for the "Multiple Speed PTO Operation" by Using the "PTO Engine RPM Set Speed A" and "PTO Engine RPM Set Speed B"
Frame 3 Refer to Illustration 37.
Controlling Equipment	Action that was taken by the Operator of the PTO	Result	Resultant Engine RPM
The PTO On/Off Switch is ON. The "PTO Engine RPM Set Speed A" is ON. The "PTO Engine RPM Set Speed B" is OFF.	Turn the "PTO Engine RPM Set Speed A" to the ON position.	The engine is now at the programmed PTO Engine RPM Set Speed "A". NOTE: Set Speed "A" has priority over Set Speed "B". Set Speed "A" also has priority over the PTO to Set Speed.	1500 rpm

Illustration 38	g00648657

Table 44

Example 2 for the "Multiple Speed PTO Operation" by Using the "PTO Engine RPM Set Speed A" and "PTO Engine RPM Set Speed B"
Frame 4 Refer to Illustration 38.
Controlling Equipment	Action that was taken by the Operator of the PTO	Result	Resultant Engine RPM
The PTO On/Off Switch is ON. The "PTO Engine RPM Set Speed A" is ON. The "PTO Engine RPM Set Speed B" is ON.	Turn the "PTO Engine RPM Set Speed B" to the ON position.	The engine will remain at the programmed PTO Engine RPM Set Speed "A". NOTE: Set Speed "A" has priority over Set Speed "B". Set Speed "A" also has priority over the PTO to Set Speed.	1500 rpm

Illustration 39	g00648658

Table 45

Example 2 for the "Multiple Speed PTO Operation" by Using the "PTO Engine RPM Set Speed A" and "PTO Engine RPM Set Speed B"
Frame 5 Refer to Illustration 39.
Controlling Equipment	Action that was taken by the Operator of the PTO	Result	Resultant Engine RPM
The PTO On/Off Switch is ON. The "PTO Engine RPM Set Speed A" is OFF. The "PTO Engine RPM Set Speed B" is ON.	Turn the "PTO Engine RPM Set Speed A" to the OFF position.	The engine will go to the programmed PTO Engine RPM Set Speed "B". NOTE: Set Speed "B" has priority over the PTO to Set Speed.	1200 rpm

Illustration 40	g00648659

Table 46

Example 2 for the "Multiple Speed PTO Operation" by Using the "PTO Engine RPM Set Speed A" and "PTO Engine RPM Set Speed B"
Frame 6 Refer to Illustration 40.
Controlling Equipment	Action that was taken by the Operator of the PTO	Result	Resultant Engine RPM
The PTO On/Off Switch is ON. The "PTO Engine RPM Set Speed A" is OFF. The "PTO Engine RPM Set Speed B" is OFF.	Turn the "PTO Engine RPM Set Speed B" to the OFF position.	The engine is at programmed PTO Engine RPM Set Speed.	1000 rpm

Illustration 41	g00721614

Table 47

Example 2 for the "Multiple Speed PTO Operation" by Using the "PTO Engine RPM Set Speed A" and "PTO Engine RPM Set Speed B"
Frame 7 Refer to Illustration 41.
Controlling Equipment	Action that was taken by the Operator of the PTO	Result	Resultant Engine RPM
The PTO On/Off Switch is OFF. The "PTO Engine RPM Set Speed A" is OFF. The "PTO Engine RPM Set Speed B" is OFF.	Turn the PTO On/Off Switch to the OFF position.	The engine is at the programmed low idle of 600 rpm.	600 rpm

Illustration 42	g00648661

Table 48

Example 2 for the "Multiple Speed PTO Operation" by Using the "PTO Engine RPM Set Speed A" and "PTO Engine RPM Set Speed B"
Frame 8 Refer to Illustration 42.
Controlling Equipment	Action that was taken by the Operator of the PTO	Result	Resultant Engine RPM
The PTO On/Off Switch is ON. The "PTO Engine RPM Set Speed A" is OFF. The "PTO Engine RPM Set Speed B" is ON.	Turn the PTO On/Off Switch to the ON position. Turn the "PTO Engine RPM Set Speed B" to the ON position.	The engine is at programmed "PTO Engine RPM Set Speed B".	1200 rpm

Programmable "Torque Limit"

Programming the parameter for the "Torque Limit" provides an engine torque limit for PTO operation or other special situations. This feature should only be used for temporary protection of equipment. The programmable range for this parameter is 270 to 3400 N·m (200 to 2500 lb ft). The range is in 1 N·m (1 lb ft) increments. Programming the "Torque Limit" above the rated torque of the engine will not provide additional torque. The engine will operate using the normal torque curve whenever the normal torque is less than the programmed value of the "Torque Limit".

The tables demonstrate the Torque Limit for the PTO. The tables also demonstrate the "Torque Limit" when the PTO is OFF. The "Torque Limit" operates when the PTO On/Off switch is ON. When the PTO On/Off switch is OFF and the Torque Limit Switch is ON, the "Torque Limit" will operate. Refer to C-10, C-12, 3406E, C-15, and C-16 Truck Engine Electronic PTO Installation and Applications Manual, "Cab Switches with Torque Limiting and Ignore Brake/Clutch Switch" for more information if the configuration for the PTO is programmed to Cab Switches. Refer to C-10, C-12, 3406E, C-15, and C-16 Truck Engine Electronic PTO Installation and Applications Manual, "Remote Switches with Torque Limiting and Ignore Brake/Clutch Switch" for more information if the configuration for the PTO is programmed to Remote Switches. The Torque Limit switch should be part of the system that requires the torque limit. Program the "Torque Limit" to the torque that is rated for the device that is protected by the "Torque Limit".

NOTE: The programmed torque level is an estimate. To achieve precise torque limiting, a chassis dynamometer may be required.

Illustration 43	g00621329
(1) Engine Speed (RPM) (2) Torque (3) Normal Engine Torque Curve (4) Programmed Torque Limit

Illustration 44	g00621335
(1) Engine Speed (RPM) (2) Torque (4) Programmed Torque Limit

Operation of the "Torque Limit" With PTO On/Off Switch

Table 49

Parameter Programming
"PTO Configuration"	Cab Switches, Remote Switches, or Remote Throttle
"Torque Limit"	The value should be below rated torque of the engine.

Illustration 45	g00721947

Table 50

Operation of the "Torque Limit" With PTO On/Off Switch
Frame 1 Refer to Illustration 45.
Controlling Equipment	Action that was taken by the Operator of the PTO	Result
The Torque Limit switch is OFF. The PTO On/Off switch is OFF.	Start the engine.	The normal engine torque is used. Refer to Illustration 43.

Illustration 46	g00721950

Table 51

Operation of the "Torque Limit" With PTO On/Off Switch
Frame 2 Refer to Illustration 46.
Controlling Equipment	Action that was taken by the Operator of the PTO	Result
The Torque Limit switch is OFF. The PTO On/Off switch is ON.	Turn the PTO On/Off switch to the ON position.	The normal engine torque is used. Refer to Illustration 43.

Illustration 47	g00721951

Table 52

Operation of the "Torque Limit" With PTO On/Off Switch
Frame 3 Refer to Illustration 47.
Controlling Equipment	Action that was taken by the Operator of the PTO	Result
The Torque Limit switch is ON. The PTO On/Off switch is ON.	Turn the Torque Limit switch to the ON position. Turn the PTO On/Off switch to the ON position.	The "Torque Limit" that has been programmed is activated. This will reduce the torque that is available. Refer to Illustration 44.

Illustration 48	g00721952

Table 53

Operation of the "Torque Limit" With PTO On/Off Switch
Frame 4 Refer to Illustration 48.
Controlling Equipment	Action that was taken by the Operator of the PTO	Result
The Torque Limit switch is ON. The PTO On/Off switch is OFF.	Turn the Torque Limit switch to the ON position. Turn the PTO On/Off switch to the OFF position.	The "Torque Limit" that has been programmed is activated. This will reduce the torque that is available. Refer to Illustration 44.

"PTO Cab Controls RPM Limit"

The "PTO Cab Controls RPM Limit" is active when the "PTO Configuration" is programmed to Cab Switches. The accelerator in the cab is always limited to low idle when the PTO Configuration is programmed to Remote Switches. The accelerator position sensor that is in the cab is limited to the value of the "PTO Cab Controls RPM Limit" only when the PTO On/Off circuit is in the ON position. This is useful for applications with equipment that may be damaged by engine overspeed. This parameter has three programmable choices. The following items are the three programmable choices: Low Idle, TEL and PTO TEL.

• If the "PTO Cab Controls RPM Limit" is programmed to Low Idle, then the engine will not exceed the programmed Low Idle when the accelerator pedal is depressed. The PTO On/Off circuit must also be in the ON position. The accelerator pedal is ignored.

• If "PTO Cab Controls RPM Limit" is programmed to the "TEL", then depressing the accelerator pedal will allow the engine to achieve the programmed "TEL".

• If "PTO Cab Controls RPM Limit" is programmed to the "PTO TEL", then depressing the accelerator pedal will allow the engine to reach the programmed "PTO TEL". The PTO On/Off circuit must also be in the ON position.

The next three tables describe each of the three options that are for this parameter.

"PTO Cab Controls RPM Limit" That is Programmed to Low Idle

Table 54

Parameter Programming for "PTO Cab Controls RPM Limit" That is Programmed to Low Idle
"PTO Configuration"	Cab Switches
"PTO TEL"	2000 rpm
"PTO Cab Throttle Limit"	Low Idle
"TEL"	2120 rpm

Illustration 49	g00721615

Table 55

"PTO Cab Controls RPM Limit" That is Programmed to Low Idle
Frame 1 Refer to Illustration 49.
Controlling Equipment	Action that was taken by the Operator of the PTO	Result	Resultant Engine RPM
The PTO On/Off Switch is OFF. The Accelerator Pedal is fully depressed.	Fully depress the Accelerator Pedal.	The engine will not exceed the programmed "TEL" of 2120 rpm.	2120 rpm

Illustration 50	g00721617

Table 56

"PTO Cab Controls RPM Limit" That is Programmed to Low Idle
Frame 2 Refer to Illustration 50.
Controlling Equipment	Action that was taken by the Operator of the PTO	Result	Resultant Engine RPM
The PTO On/Off switch is ON. The Accelerator Pedal is fully depressed.	Turn the PTO On/Off Switch to the ON position.	The engine will return to the Low Idle Engine RPM of 600.	600 rpm

"Cab Throttle RPM Limit" That is Programmed to The "TEL"

Table 57

Parameter Programming for "Cab Throttle RPM Limit" That is Programmed to The "TEL"
"PTO Configuration"	Cab Switches
"PTO TEL"	2000 rpm
"PTO Cab Throttle Limit"	TEL
"TEL"	2120 rpm

Illustration 51	g00721629

Table 58

"Cab Throttle RPM Limit" That is Programmed to The "TEL"
Frame 1 Refer to Illustration 51.
Controlling Equipment	Action that was taken by the Operator of the PTO	Result	Resultant Engine RPM
The PTO On/Off Switch is OFF. The Accelerator Pedal is fully depressed.	Fully depress the Accelerator Pedal.	The engine will not exceed the programmed "TEL" of 2120 rpm.	2120 rpm

Illustration 52	g00721630

Table 59

"Cab Throttle RPM Limit" That is Programmed to The "TEL"
Frame 2 Refer to Illustration 52.
Controlling Equipment	Action that was taken by the Operator of the PTO	Result	Resultant Engine RPM
The PTO On/Off Switch is ON. The Accelerator Pedal is fully depressed.	Turn the PTO On/Off Switch to the ON position.	The engine will remain at the "TEL" of 2120 rpm.	2120 rpm

"Cab Throttle RPM Limit" That is Programmed to The "PTO TEL"

Table 60

Parameter Programming for "Cab Throttle RPM Limit" That is Programmed to The "PTO TEL"
"PTO Configuration"	Cab Switches
"PTO TEL"	2000 rpm
"PTO Cab Throttle Limit"	PTO TEL
"TEL"	2120 rpm

Illustration 53	g00721631

Table 61

"Cab Throttle RPM Limit" That is Programmed to The "PTO TEL"
Frame 1 Refer to Illustration 53.
Controlling Equipment	Action that was taken by the Operator of the PTO	Result	Resultant Engine RPM
The PTO On/Off switch is OFF. The Accelerator Pedal is fully depressed.	Fully depress the Accelerator Pedal.	The engine will accelerate to the programmed "TEL" of 2120 rpm.	2120 rpm

Illustration 54	g00721632

Table 62

"Cab Throttle RPM Limit" That is Programmed to The "PTO TEL"
Frame 2 Refer to Illustration 54.
Controlling Equipment	Action that was taken by the Operator of the PTO	Result	Resultant Engine RPM
The PTO On/Off Switch is ON. The Accelerator Pedal is fully depressed.	Turn the PTO On/Off Switch to the ON position.	The engine will decelerate to the "PTO TEL" of 2000 rpm.	2000 rpm

"Idle/PTO RPM Ramp Rate"

The "Idle/PTO RPM Ramp Rate" determines the rate of acceleration and deceleration of the engine when the engine rpm is changing. This happens because of the actuation of the following items: Set/Resume switch, "Idle/PTO Bump RPM", "PTO to Set Speed" and parameters for the "PTO Engine RPM Set Speed". The "Idle/PTO RPM Ramp Rate" is not applicable to the acceleration and the deceleration of the engine due to an accelerator position sensor.

The parameter is programmed in one rpm per second increments from 5 to 1000 rpm per second. This parameter should be programmed in order to match the application. Some applications have a reduced cycle time that is critical. This will provide reduced cycle times for those applications. Programming excessive ramp rates may stress the driven equipment.

"Idle/PTO Bump RPM"

The "Idle/PTO Bump RPM" can be programmed to change the engine rpm when the Set/Resume switch is toggled. This parameter determines the change in rpm when the Set/Resume switch is toggled. If the PTO Engine RPM Set Speed is programmed to one rpm or above, then the parameter is overridden.

Note: The "Idle/PTO Bump RPM" can not be used with the "Fast Idle" operation. The Fast Idle RPM is not set or changed with the Cruise Control Set/Resume switch.

Table 63

Parameter Programming for "Idle/PTO Bump RPM"
"PTO to Set Speed"	NO
"PTO Engine RPM Set Speed"	0 rpm
"Cruise/Idle/PTO Switch Configuration"	Set/Accelerate
"Idle/PTO Bump RPM"	400 rpm
"PTO TEL"	1800 rpm

Illustration 55	g00721633

Table 64

"Idle/PTO Bump RPM"
Frame 1 Refer to Illustration 55.
Controlling Equipment	Action that was taken by the Operator of the PTO	Result	Resultant Engine RPM
The PTO On/Off Switch is OFF. The Set/Resume Switch is OFF.	Start the engine.	The engine will remain at the low idle of 600 rpm.	600 rpm

Illustration 56	g00721635

Table 65

"Idle/PTO Bump RPM"
Frame 2 Refer to Illustration 56.
Controlling Equipment	Action that was taken by the Operator of the PTO	Result	Resultant Engine RPM
The PTO On/Off Switch is ON. The Set/Resume Switch is OFF.	Turn the PTO On/Off Switch to the ON position.	The engine will remain at the low idle of 600 rpm because the "PTO to Set Speed" is programmed to NO.	600 rpm

Illustration 57	g00721638

Table 66

"Idle/PTO Bump RPM"
Frame 3 Refer to Illustration 57.
Controlling Equipment	Action that was taken by the Operator of the PTO	Result	Resultant Engine RPM
The PTO On/Off switch is ON. The Set/Resume Switch is in the SET position.	Quickly toggle the Set/Resume Switch to the SET position and then release.	The engine will accelerate 400 rpm. This is the "Idle/PTO Bump RPM" value. The engine rpm is now 1000.	1000 rpm

Illustration 58	g00721639

Table 67

"Idle/PTO Bump RPM"
Frame 4 Refer to Illustration 58.
Controlling Equipment	Action that was taken by the Operator of the PTO	Result	Resultant Engine RPM
The PTO On/Off switch is ON. The Set/Resume Switch is in the SET position.	Quickly toggle the Set/Resume Switch to the SET position and then release.	The engine will accelerate 400 rpm. This is the "Idle/PTO Bump RPM" value. The engine rpm is now 1400.	1400 rpm

Illustration 59	g00743956

Table 68

"Idle/PTO Bump RPM"
Frame 5 Refer to Illustration 59.
Controlling Equipment	Action that was taken by the Operator of the PTO	Result	Resultant Engine RPM
The PTO On/Off switch is ON. The Set/Resume Switch is in the SET position.	Quickly toggle the Set/Resume Switch to the SET position and then release.	The engine will accelerate 400 rpm. This is the "Idle/PTO Bump RPM" value. The engine rpm is now 1800, which is the PTO TEL.	1800 rpm

"PTO Vehicle Speed Limit"

The parameter for the "PTO Vehicle Speed Limit" is used to disable a "PTO Set Speed" when the vehicle speed exceeds the programmed limit. The PTO On/Off switch operates the "PTO Vehicle Speed Limit". The programmable range is 2 to 204 km/h (1 to 127 mph) in increments of one. By programming the parameter to one, the PTO Set RPM will be disabled while the vehicle is moving. The following item will cause disengagement of an active set rpm: exceeding the "PTO Vehicle Speed Limit".

Note: A PTO that is driven by the transmission will produce a vehicle speed signal. Program the parameter for the "PTO Vehicle Speed Limit" to the maximum value of 204 km/h (127 mph) instead of disconnecting the vehicle speed circuit during the operation of the PTO. This will ensure that the "PTO Set Speed" will not be disabled due to vehicle speed.

Note: In some instances, a false vehicle signal can be produced during the operation of the PTO due to the movement of the drive train. If the parameter for the "PTO Vehicle Speed Limit" is programmed to a very low value, then the operation of the PTO will abort when the false vehicle speed exceeds the programmed limit. It may be necessary to isolate the source of the false speed signal. The "PTO Vehicle Speed Limit" can also be programmed to a higher value.

"Cruise/Idle/PTO Switch Configuration"

This parameter will determine the ACCEL and DECEL function of both the Cruise Control On/Off switch and the PTO On/Off switch. The switch can be used for the Set/Resume switch or the switch can be held in position for a constant acceleration. The default positions follow: The Set position is the ACCEL position and the Resume position is the DECEL position. This can be changed by using the Caterpillar Electronic Service Tool.

Note: The Set Switch serves as the RPM Increase position and the Resume Switch serves as the RPM Decrease position under the following conditions: The PTO On/Off Switch is in the ON position. and The PTO Engine RPM Set Speed is programmed to one rpm or more. This is regardless of the programmed setting for the "Cruise/Idle/PTO Switch" configuration.

"Engine Monitoring"

An engine monitoring function is available for the C-10, C-12, 3406E, C-15, and C-16 Truck engines. The parameter can be programmed to Off, Warning, Derate or Shutdown. Refer to the engine Operation and Maintenance Manual for additional information regarding this feature.

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If Engine Monitoring is programmed to "Derate" or "Shutdown", and one of the monitored conditions is exceeded, then the engine will derate or shutdown. This should be considered especially if derating or shutting the engine down during PTO operation. This could present a problem for the vehicle or possible injury to the operator.