Challenger 35, Challenger 45 and Challenger 55 Agricultural Tractors Electronic Systems Caterpillar

Description

In this mode, certain functions of the three-point hitch can be viewed and the three-point hitch can be calibrated. This mode allows the technician to:

• Evaluate the performance while operating in the field. See "Procedure To View The Three-Point Hitch Status".

• Recalibrate the three-point hitch if any components (including the CCM) have been repaired/replaced, or if a F024 fault has occurred. See "Procedure To Calibrate Three-Point Hitch".

See the Mode 11 chart for a description of the "H1" through "H6" functions. Functions "H1" through "H4" allow the technician to evaluate the performance of the three-point hitch while the machine is in operation. Function "H5" and "H6" are part of the three-point hitch calibration procedure.

Procedure To View The Three-Point Hitch Status

Illustration 1	g00567681
Display shows that "860" is the value of function H1. (1) Readout (2) Digit Set key (3) Digit Select key (4) "Setup/Select" key (5) "Start/Stop/Reset" key (6) "Exit/Mode" key (19) Readout

This procedure is only for the viewing of the three-point hitch functions (H1 to H6). For calibration, see "Procedure To Calibrate Three-Point Hitch".

Note: Mode 11 can be entered with or without the engine running. If it is desired to operate the machine while viewing the functions, start the engine prior to entering Mode 11.

1. Enter the three-point hitch status and calibration mode (Mode 11):

   1. Turn the key start switch from OFF to ON.

   2. Press and hold the "Setup/Select" key (4) for three seconds.

   3. Press the digit set key (2) until the readout (1) shows "_ _ 1 1".

   4. Press and hold the "Setup/Select" key (4) for three seconds in order to enter Mode 11.

2. After entering mode 11, information is immediately shown on the readout (19) and the readout (1). Readout (19) shows the function identifier ("H1" to "H6"). Readout (1) shows the current value of the function. To view the different functions ("H1" to "H6"), repeatedly press "Setup/Select" key (4). This causes the EMC to cycle through the functions. The sequence is listed in Table 1.

3. Select the desired function identifier ("H1" to "H6"). Repeatedly press "Setup/Select" key (4) until the desired function identifier is showing on the readout (19). The present value of the function is showing on the readout (1).

4. Operate the machine while you are viewing the value of the selected function. Use the information gathered to evaluate the performance.

5. To return the EMC to service mode selection, press "Exit/Mode" key (6) one time. To return the EMC to normal operation, press "Exit/Mode" key (6) two times.

Procedure To Calibrate Three-Point Hitch

The following procedure must be performed in order to clear an active F024 fault code. All F024 fault codes must be cleared in order for the three-point hitch to properly calibrate.

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Illustration 2	g00508442

1. Turn draft/position control knob (2) all the way in the counterclockwise direction to the position only detent.

2. Turn height limit control (3) all the way in the clockwise direction to the maximum height position.

3. Make sure that three-point hitch raise/lower switch (4) is in the LOWER position.

4. Engage the parking brake.

5. Start the engine. Run the engine at low idle speed.

6. Move the three-point hitch control lever (1) all the way forward.

7. Check the three-point hitch lift cylinders for exposed chrome. If chrome is visible, use the external position control switch in order to lower the hitch until the cylinders are fully retracted. This step is required in order to ensure that the full travel range of the hitch is being utilized.

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Illustration 3	g00337133

8. Press the setup/select switch (5). Hold the setup/select switch on the Machine Performance Panel for three seconds until you hear a beep. The Machine Performance Panel will display "_ _ _ 1". This indicates that the Electronic Monitoring Center is in Mode 1. There are 12 modes.

9. Press digit set switch (6) twice. "_ _ 1 1" is displayed on the Machine Performance Panel. In order to enter Mode 11, hold setup/select switch (5) until you hear a beep. The hitch disabled symbol and "H1" are displayed. Also, a value for the raise solenoid is displayed. The value will be displayed in milliamperes. The value should be in the range of 900 to 1500 milliamperes.

   Note: Once Mode 11 is entered you must complete the calibration in order for the three-point hitch to operate properly.

10. Press the setup/select switch (5) once in order to advance to "H2". A value for the lower solenoid is displayed. The value will be displayed in milliamperes. The value should be in the range of 900 to 1500 milliamperes.

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Illustration 4	g00337134

11. There are two methods for the initial step of calibrating the three-point hitch. Either 11.a or 11.b may be followed.

    Note: Check the three-point hitch lift cylinders for exposed chrome. The three-point hitch must be fully lowered. If the three-point hitch is not lowered, the following conditions occur because the memory is cleared.

    • The upper limits and lower limits for the quadrant lever and rockshaft potentiometers are cleared

    • The TPM identifies the current quadrant lever and rockshaft positions as zero.

    • When step 11.a is followed, the H1 and H2 calibration values are reset to 900 milliamps which may be too low to lower the hitch with the three-point hitch control lever.

    1. Press the setup/select switch until the Machine Performance Panel displays "H5". Be sure to release the setup/select switch after the "H5" is displayed. "H5" is the non-volatile memory reset. Press the setup/select switch (5). Hold the setup/select switch on the Machine Performance Panel for three seconds until you hear a beep. The Machine Performance Panel momentarily displays "H6" and "2". The Machine Performance Panel momentarily flashes "EE". This indicates that the current calibration values have been cleared. The Machine Performance Panel will display "H5".

    2. Press the setup/select switch until the Machine Performance Panel displays "H5". Do not release the setup/select switch after the "H5" is displayed. Continue to hold the setup/select switch for three seconds until you hear a beep. This indicates that all calibration values have been cleared. "H5" is the non-volatile memory reset.

Note: Step 13 and Step 14 establish the limits of the following components: three-point hitch position sensor and lever position sensor for the three-point hitch control lever.

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Illustration 5	g00508486

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Illustration 6	g00545451

12. Press the setup/select switch once until "H6" is displayed.

13. Move three-point hitch control lever (1) all the way in the rearward direction in order to capture the three-point hitch. The three-point hitch will raise all the way. The upper limit is now established.

    Note: Since the limits have been cleared, the hitch will not slow down as the three-point hitch cylinders approach the maximum extension. The force from the bottoming out of the cylinders can be felt in the cab. The "H6" value should be "0". This indicates that the system is ready for calibration of the solenoid valves.

14. Move the three-point hitch control lever (1) all the way forward. The three-point hitch will lower all the way. Exit Mode 11 by pressing the "Exit/Mode" switch once. Wait for at least 30 seconds. The three-point hitch must be fully lowered before performing the next step. The lower limit is now established.

    Note: Use Step 15 through Step 16 in order to establish the value of the raise threshold and lower threshold of the actuator solenoids.

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Illustration 7	g00545451

15. Raise the three-point hitch to a value of "75 +/- 15%".

    Note: The three-point hitch must be raised in a continuous motion. The calibration procedure begins once the motion has ceased.

16. The three-point hitch cycles up and down until three complete cycles are verified. While the hitch is cycling, enter Mode 11 by pressing the setup/select switch for three seconds until you hear a beep. Then press the setup/select switch again until "H6" is displayed. The "H6" value should be 0.

    Note: The three-point hitch control lever should not be moved until the cycles are complete. Otherwise, the calibration procedure may be corrupted.

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Illustration 8	g00337137

17. After the three-point hitch completes the three cycles, the Machine Performance Panel displays "H6" and "9".

18. Press the "E/M" switch twice in order to exit Mode 11.

19. In order to verify that the three-point hitch is calibrated, push the three-point hitch control lever all the way forward. Make sure that the three-point hitch lift cylinders retract all the way. Pull the three-point hitch control lever rearward. Make sure that the three-point hitch raises completely.

20. If Step 19 is not verified, you must calibrate the three-point hitch again. Stop the engine. Wait for 10 seconds. Repeat Step 1 through Step 19.

21. In order to save the calibration, turn the engine start switch key to the OFF position. Wait at least 10 seconds before you start the engine. This will save the calibration values.