D6K Track-Type Tractor Electrohydraulic Power Train Caterpillar

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Personal injury or death can result from improper maintenance procedures. To avoid injury or death, follow the procedures exactly as stated below.

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If the proper torquing procedure is not used when reinstalling the ROPS structure, the ROPS structure may be weakened which could result in serious injury or death. Ensure that all contact surfaces are clean before reinstalling the ROPS structure. Ensure that the correct torquing procedure is followed when reinstalling the ROPS structure.

Introduction

This procedure will allow the operator to determine if the hydrostatic pressure from the drive pumps is adjusted correctly. This procedure should only be performed after the cab has been removed.

Required Tools

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Tooling (A)

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Tooling (B)

Note: The minimum recommendation is two sets of (A) tooling.

Testing Procedure

ReferenceBefore you conduct the following test, perform the steps that are listed in Testing and Adjusting, "Machine Preparation".

Note: Before starting the test, make sure that the speed sensors are installed correctly in both of the hydrostatic motors.

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Illustration 3	g01459844

Note: When, you are attaching tooling (B) make sure that the ground is also attached to the machine.

1. Attach tooling (B) to the machine.

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Illustration 4	g01459845

Note: When, you are attaching tooling (B) make sure that the ground is also attached to the cab.

2. Attach the other end of tooling (B) to the cab.

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Illustration 5	g01458954

3. Turn off the battery disconnect switch. The battery disconnect switch is located in front of the rear access compartment on the right side of the machine.

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Illustration 6	g01458960

4. Rotate (2) screws counterclockwise in order to remove access panel (1) .

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5. Connect the communication adapter to the service tool connector (3) .

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Illustration 8	g01330954

6. Open the access door on the left side of the machine.

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Illustration 9	g01458964
(S/N: NCF1-62FBH1-1254DHA1-1558)

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Illustration 10	g02625854
(S/N: NCF63-UPFBH1255-UPDHA1559-UP)

7. Connect tooling (A) to pressure tap (4) and to pressure tap (5) .

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Illustration 11	g01458965

8. Connect tooling (A) to pressure tap (6) and to pressure tap (7) . These taps are located underneath the cab floor on the hydrostatic pumps.

9. Use the Electronic Technician (ET) in order to perform the transmission stall test. Select the "Diagnostics" option from the Electronic Technician (ET) menu. Then, select "Diagnostic Tests" from the drop-down menu. Select the "Remote Transmission Stall Diagnostic" from the selection menu. Follow the instructions that are provided.

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Illustration 12	g01357089

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Illustration 14	g01445550

Note: Ensure that the parking brake indicator is ON.

10. Simulate the transmission control lever to the FORWARD position by clicking the "F" button. The tracks should not move.

Note: Do not stall the drive system for more than 15 seconds.

11. Check the drive pressure of the front pump and the drive pressure of the rear pump. Record the data onto the worksheets.

    1. The drive pressure for the front pump at pressure tap (4) should be 45250 ± 2000 kPa (6563 ± 290 psi).

    2. The drive pressure for the rear pump at pressure tap (5) should be 44650 ± 2000 kPa (6476 ± 290 psi).

12. Simulate the return of the transmission control lever to the NEUTRAL position by clicking the "N" button.

13. Simulate the transmission control lever to the REVERSE position by clicking the "R" button. The tracks should not move.

Note: Do not stall the drive system for more than 15 seconds.

14. Check the drive pressure of the front pump and the drive pressure of the rear pump. Record the data onto the worksheets.

    1. The drive pressure for the front pump at pressure tap (6) should be 45250 ± 2000 kPa (6563 ± 290 psi).

    2. The drive pressure for the rear pump at pressure tap (7) should be 44650 ± 2000 kPa (6476 ± 290 psi).

15. Simulate the return of the transmission control lever to the NEUTRAL position by clicking the "N" button.

Note: If the system fails to build pressure, there is probably a problem with the repair that was made prior to the test. This is not probably a component failure.