345C Excavator Tool Control System Caterpillar

This calibration procedure is used in order to record the calibration data from the proportional solenoid valve for the negative flow control. This calibration should be done at the following times: replacement of the NFC solenoid valve, replacement of the ECM, flash new software and adjustments to the horsepower controls on the pump.

Before this procedure is performed, ensure that the following requirements are met:

• Verify that the engine speed is properly calibrated. If necessary, see Testing and Adjusting, "Calibration" for the Machine Electronic Control System.

• Verify that the pilot pressure is set to the proper specification that is found in Testing and Adjusting, "Relief Valve (Pilot) - Test and Adjust" for the machine.

• Verify that the main relief valve is set to the proper specification that is found in Testing and Adjusting, "Relief Valve (Main) - Test and Adjust" for the machine.

• Verify that the power shift pressure is properly calibrated. If necessary, see Testing and Adjusting, "Calibration" for the Machine Electronic Control System.

There are two methods for calibrating the proportional solenoid valve for negative flow control. One method uses a flow meter and a pressure gauge. This method is more accurate. The other method uses only a pressure gauge. This method is less accurate. Both methods are described below.

Note: The less accurate method which uses only a pressure gauge is used only when a flow meter is not available.

Illustration 1	g01243522
Right pedal for the work tool

The device for activation of the work tool is the right pedal.

Calibration with a Pressure Gauge and a Flow Meter

Note: When additional safety is needed on machines that are equipped with a swing brake solenoid, disconnect the swing brake solenoid so that the swing brake remains engaged.

1. Position the machine on level ground and stop the engine.

2. Release the pressure in the hydraulic system. Refer to Testing and Adjusting, "Hydraulic System Pressure - Release" for the machine.

3. Install a 400 L (80 US gal) flow meter in the hydraulic line to the tool.

   Note: Table 1 lists the parts which appear in Illustration 2.

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   Table 1

   TOOL CHART FOR FLOW TEST
   Item Number	Part Number	Part Description		Quantity
   10	4C-9910	Flow Meter		1
   11	6K-6307	O-ring seal		2
   12	8C-9026	Adapter		2
   13	7M-8485	O-ring seal		8
   14	4C-6482	Nipple		4
   	9U-5086	Optional Dust Cap		4
   15	4C-6481	Coupler		4
   	9U-5084	Optional Dust Plug		4
   16	4C-8767	Coupling		4
   17	5P-1010	Sleeve		4
   18	5P-0201	XT-5 Hose 3.5 m (12 ft)		2
   19	8T-4194	Bolt		4
   20	8T-4223	Hard Washer		2
   21	1P-5767	Half Flange		4
   22	9U-7440	Adapter		2
   23	1P-3704	Rectangular Seal		2
   28	6V-4143	Coupler		2
   29	6V-3014	Hose		1
   30	6V-3989	Nipple		1
   31	8T-0861	Pressure Gauge		1

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   Illustration 2	g01223669
   (24) Port on supply line for work tool (25) Port on return line for work tool (26) Pump pressure tap (27) Pump pressure tap (35) Main pump

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   Illustration 3	g01134699
   (10) Flow meter (32) Test hose from the supply line for work tool (33) Test hose to the return line for the work tool (34) Load valve for flow meter (40) Flow meter inlet (41) Outlet of the flow meter (42) Pressure gauge for the flow meter

   1. Connect one end of the test hose (32) to the supply line for the work tool (24) . Connect the other end of the test hose (32) to the inlet port on the flow meter (40) . Refer to Illustration 3.

   2. Connect one end of the second test hose (33) to the return line for the work tool. Connect the other end of the test hose (33) to the outlet port on the flow meter. Refer to Illustration 3.

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Illustration 4	g01133692
Pump Compartment (26) Pressure tap (idler pump pressure) (27) Pressure tap (drive pump pressure) (37) Pressure tap (power shift pressure)

4. Install a 40000 kPa (5800 psi) pressure gauge (31) on pressure tap (27) .

5. Place the backup switch in the AUTO position.

6. Start the engine.

7. Move the engine speed dial to position 10.

8. Increase the oil temperature to 50 °C (122 °F).

Two Pump Calibration

Use Illustration 5 in order to navigate the monitor.

Illustration 5	g01197980
(1) Up key (2) Right key (3) Home key (4) Main menu (5) Left key (6) Down key (7) Cancel key (8) OK key

1. Be sure to select a work tool that provides one pump flow. Refer to Testing and Adjusting, "Work Tool - Select" for the Tool Control System.

2. In order to access the "CALIBRATION" menu, you must first enter the "SERVICE" mode on the monitor.

3. Use the following procedure to access the "SERVICE" screen on the monitor.

   1. From the default screen, press the main menu key (4) .

   2. From the "MAIN MENU" screen, use the right key (2) to scroll through the menu options.

   3. When the "SERVICE" option is highlighted, press the OK key (8) .

   4. When "PASSWORD" screen appears, use the right key (2) and the left key (5) in order to scroll through the characters. When the desired character is highlighted, press the OK key (8) . Enter the password for service FFF2 in order to continue to the "SERVICE" screen.

   5. After the password has been entered the "SERVICE" screen should appear. Refer to Illustration 6.

      Note: For more detailed steps with entering passwords or entering the service mode, refer to Troubleshooting, "Using Service Mode" for the Tool Control System.

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Illustration 6	g01199794
Typical example of the "SERVICE" menu for the monitor

4. From the "SERVICE" menu, use the up key (1) or the down key (6) in order to move the highlighted line.

5. When the "CALIBRATIONS" menu option is highlighted, press the OK key (8) .

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Illustration 7	g01223994
Typical example of the "CALIBRATIONS" screen

6. After the OK key is pressed the "CALIBRATIONS" screen will appear. From the "CALIBRATIONS" menu, highlight "FLOW LIMIT VALVE".

7. When the "FLOW LIMIT VALVE" option is highlighted, press the OK key (8) .

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Illustration 8	g01133910

8. After the OK key is pressed the "FLOW LIMIT VALVE" menu will appear. From this menu, the following options are available:
   • "FLOW LIMIT PRES"

   • "2PUMP FLOW LIMIT"

   • "1PUMP FLOW LIMIT"

9. From the "FLOW LIMIT VALVE" menu, highlight the "2PUMP FLOW LIMIT" option. When "2PUMP FLOW LIMIT" option is highlighted, press the OK key (8) .

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Illustration 9	g01200825
"CALIBRATION TITLE" screen (L) Lower limit (U) Upper limit (C) Current value (S) "STEP No:"

10. After the OK key is pressed, the "CALIBRATION TITLE" screen will appear. Refer to Illustration 9. The "CALIBRATION TITLE" screen allows the upper limitation and the lower limitation to be set.

    Note: The title of the calibration and the name of the step will change in accordance to the procedure that is being performed. "CALIBRATION TITLE" and "STEP NAME" are used in this document as an example.

    Note: In the "CALIBRATION TITLE" screen, "STEP No" is displayed in blue. The "OPERATIONAL GUIDANCE" will be displayed in green.

11. The following procedure describes calibration of the monitor.

    1. Perform the "2PUMP FLOW -MAX" calibration first.

    2. Press the device for activation 3 times and release the device for activation 3 times.

    3. Press and hold the device for activation to the OPERATING position during calibration. Press the OK key (8) .

       Note: Pressing the device for activation three times ensures that an accurate reading will result.

    4. Adjust the setting of the load valve of the flow meter (34) and observe pressure gauge (42) . Adjust the setting until the "INDICATED PRESSURE" from Table 2 is achieved.

       Pump pressure is affected by the flow and the open rate of the load valve on the flow meter (34) . The load valve on the flow meter (34) must be adjusted when a change of calibration is made. When you adjust the calibration value and the open rate of the load valve on the flow meter (34) , always return the tool to the neutral position and repeat the calibration.

       If the flow is not within the proper specifications, the machine must be adjusted. Proceed to Steps 11.e through 11.j.

    5. Release the device for activation. DO NOT change the setting of the load valve on the flow meter (34) .

    6. Press the right key (2) in order to increase the value or press the left key (5) in order to decrease the value.

    7. Press and release the device for activation 3 times.

    8. Press and hold the device for activation.

    9. If the "INDICATED PRESSURE", that is found in Table 2, is out of the proper range, adjust the load valve on the flow meter (34) until the pressure gauge (42) indicates the value in Table 2.

    10. Refer to Table 2 and observe the flow meter in order to verify that the flow rate is within the proper specification.

    11. Tune the flow to the "TARGET VALUE" that is located in Table 2.

    12. Repeat Step 11.e through Step 11.k until the flow rate in Step 11.k is obtained with no adjustment of the monitor or the load valve for several repetitions.

        Note: Hold the device for activation in the "OPERATION" position for a few seconds in order to allow the hydraulic system to stabilize before repeating the Steps.

    13. When the reading is within the proper range, continue to hold the device for activation in the OPERATION position and press the OK key (8) in order to set the value.

        Note: If OK key (8) is not pressed, the calibration will not be saved.

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        Table 2

        ITEM FOR CALIBRATION		DISPLAY	Use information that pertains to the calibration that is being performed.	TARGET VALUE	MEASURING POINT
        PROPORTIONAL SOLENOID VALVE FOR NEGATIVE FLOW CONTROL	"SYSTEM 1, 2, 3, 11, 14, 16', 17" Use the following information for calibration with only a pressure gauge.	NFC1 PRV	LOW PRESSURE	1450 to 1550 kPa	"Pncd" or "Pnci" These points are pressure taps for Drive pump (27) or the pressure tap for Idler pump (26) .
        			HIGH PRESSURE	2950 to 3050 kPa
        	"SYSTEM 2, 3, 11, 14, 16', 17" Use the highlighted information for calibration with a pressure gauge and a flow meter.	2 PUMP FLOW	MAX FLOW	300 ± 2 L/min	FLOW METER
        			INDICATED PRESSURE	16000 kPa	PRESSURE (42)
        			MIN FLOW	200 ± 2 L/min	FLOW METER
        			INDICATED PRESSURE	16000 kPa	PRESSURE (42)

12. When the calibration for "MAX" flow is completed, calibrate "MIN" flow. Repeat Steps 11.b through 11.m for the "MIN" flow.

The "2PUMP FLOW" calibration is now complete. It is possible for an error to occur when you are calibrating. Table 3 gives some of the errors that may occur.

Table 3

Error	Description of Event
$0001	ECM Fault
$0002	Active Diagnostic Present
$0003	Another Calibration is Active
$0004	Calibration Active by Another ECM
$0005	Loss of Calibration Interlock
$0006	Calibration Aborted by Tool/Monitor
$0007	Requested Display Not Supported
$0008	Unavailable Display
$0009	Calibration Aborted by ECM
$000A	Calibration Failure
$000B	Calibration Not Supported
$0100	Out-of-Range Low - Incr/Decr Parameter
$0101	Out-of-Range High - Incr/Decr Parameter
$0102	Invalid Action/Key Stroke Command
$0103	Calibration Value Out-of-Range
$0104	Calibration Range Too Small
$0105	Calibration Range Too Large
$0106	Calibration Value Not Saved
$1000	See Service Manual
$1010	Engine Stopped (No Engine RPM)
$1011	Engine Running (Engine RPM Present)
$1012	Engine RPM Incorrect
$1013	Engine High Idle RPM Too Fast
$1014	Engine Low Idle RPM Too Slow
$1015	Abnormal Engine RPM Signal
$1016	Speed Sensor Circuit Is Open
$1017	Service Brake Pedal Pressed
$1018	Parking Brake Not Engaged
$1019	Parking Brake Engaged
$101A	Implement is Swinging/Travelling
$101B	Machine Speed Not Zero

Calibration with a Pressure Gauge

Note: There are two methods for calibrating the proportional solenoid valve for negative flow control. One method, which uses a flow meter and a pressure gauge, is more accurate. The method that is listed below uses only a pressure gauge. This method for calibrating the proportional solenoid valve is less accurate. This method should be used only when a flow meter is not available.

Note: When additional safety is needed on machines that are equipped with a swing brake solenoid, disconnect the swing brake solenoid so that the swing brake remains engaged.

1. Be sure to select a work tool that provides one pump flow. Refer to Testing and Adjusting, "Work Tool - Select" for the Tool Control System.

2. Position the machine on level ground and stop the engine.

3. Before the adjustment procedure begins, lower the work tool to the ground.

4. Close the stop valves that are mounted on each side of the stick in order to prevent oil flow to the work tool during this procedure.

5. Release the pressure in the hydraulic system. Refer to Testing and Adjusting, "Hydraulic System Pressure - Release" for the machine.

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Illustration 10	g01224034
(38) Pressure tap for the proportional solenoid valve for negative flow control

6. Attach a 4900 kPa (750 psi) pressure gauge to the pressure tap for the proportional solenoid valve for negative flow control (38) .

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Illustration 11	g01135136
(A) Auto switch

7. Place the backup switch in the AUTO position. When AEC is active, the lamp above the auto switch will illuminate. Refer to Illustration 11.

8. Start the engine.

9. Move the engine speed dial to position 10.

10. Raise the oil temperature to 50° ± 5°C (122° F).

11. Verify that the pilot pressure is set to the specifications that are in Testing and Adjusting, "Relief Valve (Pilot) - Test and Adjust" for the machine.

12. Ensure that a "TOOL#" is selected.

13. Enter the "SERVICE" mode on the monitor. Use the following procedure to access the "SERVICE" mode.
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    Illustration 12	g01197980
    Buttons for controlling the monitor (1) Up key (2) Right key (3) Home key (4) Main menu key (5) Left key (6) Down key (7) Cancel key (8) OK key

    1. From the default screen, press the main menu key (4) .

    2. From the "MAIN MENU" screen, use the right key (2) to scroll through the menu options.

    3. When the "SERVICE" option is highlighted, press the OK key (8) .

    4. When "PASSWORD" screen appears, use the right key (2) and the left key (5) in order to scroll through the characters. When the desired character is highlighted, press the OK key (8) . Enter the password for service FFF2 in order to continue to the "SERVICE" screen.

    5. After the password has been entered the "SERVICE" screen should appear. Refer to Illustration 13.

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Illustration 13	g01199794
Typical example of the "SERVICE" menu for the monitor

14. From the "SERVICE" menu, use the up key (1) or the down key (6) in order to move the highlighted line.

15. When the "CALIBRATIONS" menu option is highlighted, press the OK key (8) .

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Illustration 14	g01223994

16. When the "FLOW LIMIT VALVE" option is highlighted, press the OK key (8) .

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Illustration 15	g01224194

17. After the OK key is pressed the "FLOW LIMIT VALVE" menu will appear. From this menu, the following options are available:
    • "FLOW LIMIT PRES"

    • "2PUMP FLOW LIMIT"

    • "1PUMP FLOW LIMIT"

    Refer to Illustration 15.

18. From the "FLOW LIMIT VALVE" menu, highlight the "FLOW LIMIT PRES" option. When "FLOW LIMIT PRES" option is highlighted, press the OK key (8) .

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Illustration 16	g01200825
"CALIBRATION TITLE" screen (L) Lower limit (U) Upper limit (C) Current value (S) "STEP No:"

19. After the OK key is pressed, the "CALIBRATION TITLE" screen allows the upper limitation and the lower limitation to be set. Refer to Illustration 16.

    Note: The title of the calibration and the name of the step will change in accordance to the procedure that is being performed. "CALIBRATION TITLE" and "STEP NAME" are used in this document as an example.

    Note: In the "CALIBRATION TITLE" screen, "STEP No" is displayed in blue. The "OPERATION GUIDANCE" will be displayed in green. Perform the following operation for each "STEP No".

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Illustration 17	g01224203
Illustration 17 displays the current value of pump 1 and pump 2.

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Illustration 18	g01224206

20. Operate the joystick to the STICK IN position. When the stick is in the STICK IN position, the hydraulic cylinder that controls the stick will be fully extended. Press the OK key (8) .

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Illustration 19	g01224207

21. After the OK key is pressed, resume operation of the joystick to the STICK IN position. Hold the stick in the STICK IN position during the calibration.

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Illustration 20	g01224218

22. While the stick is in the STICK IN position, activate the work tool. Observe the pressure on the gauge.

23. Use the left key (5) or the right key (2) to adjust the current level. Tune the machine to the "LOW PRESSURE" value that is located under "TARGET VALUE" that is found in table 2.

24. When the desired value is achieved, press the OK key (8) . The monitor will automatically begin the steps that are necessary to calibrate the "MAX" flow.

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Illustration 21	g01224223

25. Move the joystick to the STICK IN position. When the stick is in the STICK IN position, the hydraulic cylinder which controls the stick will be fully extended. Press the OK key (8) .

26. After the OK key is pressed, resume operation of the joystick to the STICK IN position. Hold the stick in the STICK IN position during the calibration.

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Illustration 22	g01224225

27. While the stick is in the STICK IN position, activate the work tool. Observe the pressure on the gauge.

28. Use the left key (5) or the right key (2) to adjust the current level. Tune the pressure to the "HIGH PRESSURE" value that is located under "TARGET VALUE" that is found in Table 2.

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Illustration 23	g01224227

29. When the desired value is achieved, press the OK key (8) . After the OK key is pressed, the monitor will automatically display the "SUCCEEDED" screen.

30. After completion of the calibration, press the cancel key (7) in order to exit the program.

31. It is possible for an error to occur during the calibration of the monitor. In case an error occurs, a screen with active errors will appear. If an screen of errors should appear, the calibration will fail and any set values that were achieved will be lost. Recalibrate the monitor. Refer to Table 4 for examples of possible errors.

Table 4

Error	Description of Event
$0001	ECM Fault
$0002	Active Diagnostic Present
$0003	Another Calibration is Active
$0004	Calibration Active by Another ECM
$0005	Loss of Calibration Interlock
$0006	Calibration Aborted by Tool/Monitor
$0007	Requested Display Not Supported
$0008	Unavailable Display
$0009	Calibration Aborted by ECM
$000A	Calibration Failure
$000B	Calibration Not Supported
$0100	Out-of-Range Low - Incr/Decr Parameter
$0101	Out-of-Range High - Incr/Decr Parameter
$0102	Invalid Action/Key Stroke Command
$0103	Calibration Value Out-of-Range
$0104	Calibration Range Too Small
$0105	Calibration Range Too Large
$0106	Calibration Value Not Saved
$1000	See Service Manual
$1010	Engine Stopped (No Engine RPM)
$1011	Engine Running (Engine RPM Present)
$1012	Engine RPM Incorrect
$1013	Engine High Idle RPM Too Fast
$1014	Engine Low Idle RPM Too Slow
$1015	Abnormal Engine RPM Signal
$1016	Speed Sensor Circuit Is Open
$1017	Service Brake Pedal Pressed
$1018	Parking Brake Not Engaged
$1019	Parking Brake Engaged
$101A	Implement is Swinging/Travelling
$101B	Machine Speed Not Zero