Deck Wrench Cylinder Duty Cycle May Not Be Within Specification on Certain MD6200, MD6250, and MD6310 Rotary Drills {7562} Caterpillar

Rotary Drill

MD6200 (S/N: D9A131-131)

MD6250 (S/N: DN7101-131; DN8102-105)

MD6310 (S/N: DLK131-131)

Introduction

The problem that is identified below does not have a known permanent solution. Until a permanent solution is known, use the solution that is identified.

Problem

Deck wrench cylinder duty cycle may not be within specification on the machines listed above.

Solution

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Do not operate or work on this product unless you have read and understood the instruction and warnings in the relevant Operation and Maintenance Manuals and relevant service literature. Failure to follow the instructions or heed the warnings could result in injury or death. Proper care is your responsibility.

Caterpillar is aware of this problem, and is recommending the following interim action.

Illustration 1	g06416775
Typical example (A) 510-3008 Hydraulic Cylinder Gp or 524-9001 Hydraulic Cylinder Gp

Follow the below procedure to check deck wrench position sensor duty cycle. If the minimum duty cycle of the deck wrench cylinder is not as per the specification, replace the existing 510-3008 Hydraulic Cylinder Gp for MD6200 and MD6250 or 524-9001 Hydraulic Cylinder Gp for MD6310 with the same new part.

Procedure to Check Deck Wrench Cylinder Position Sensor Duty Cycle:

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Illustration 2	g06417343
Cat ET

1. Launch Caterpillar Electronic Technician (ET).

   1. Select the Machine control (ECM) shown in Illustration 2.

   2. Select the status tool.

   3. Select the deck tools.

   4. Select the deck wrench cylinder position sensor duty cycle.

2. Install the drill pipe.

3. Set to drill mode.

4. Fully retract the deck wrench cylinder.

5. Check deck wrench cylinder position sensor duty cycle percentage in Cat ET.

   1. Tolerance range:

      1. MD6200 (11.45 percent to 13.88 percent)

      2. MD6250 (11.45 percent to 13.88 percent)

      3. MD6310 (11.30 percent to 13.16 percent)

6. Fully extend the deck wrench cylinder.

7. Release the deck wrench cylinder control.

8. Record check wrench cylinder position sensor duty cycle percentage in Cat ET.

   1. Tolerance range:

      1. MD6200 (84.13 percent to 88.98 percent)

      2. MD6250 (84.13 percent to 88.98 percent)

      3. MD6310 (85.98 percent to 89.70 percent)

9. Release the deck wrench cylinder control.