- Mini Hydraulic Excavator:
- 307E (S/N: H1Y1-636,639-640,643-645,647-654,656-670)
Introduction
This Special Instruction will provide the necessary steps in order to rework the harness for the display panel and fuel sender for 307E Mini Hydraulic Excavators. Read the entire Special Instruction before you order any parts or perform the following procedure.
Safety
Do not perform any procedure in this special instruction until you have read this special instruction and you understand this information. Use only proper tools and observe all precautions that pertain to the use of those tools. Failure to follow these procedures can result in personal injury. The following procedures should also be observed.
Work safely. Most accidents that involve product operation, maintenance, and repair are caused by failure to observe basic safety rules or precautions. An accident can often be avoided by recognizing potentially hazardous situations before an accident occurs.
A person must be alert to potential hazards. This person should also have the necessary training, skills, and tools in order to perform these functions properly.
Safety precautions and warnings are provided in this instruction and on the product. If these hazard warnings are not heeded, bodily injury or death could occur to you or to other persons. Caterpillar cannot anticipate every possible circumstance that might involve a potential hazard.
Therefore, the warnings in this publication and the warnings that are on the product are not all inclusive. Ensure that any tool, procedure, work method, or operating technique you use that is not recommended by Caterpillar is safe.
Park the machine on level ground with the implements lowered.
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| Illustration 1 | g03420570 |
Turn OFF the battery isolator switch (1) to avoid electrical hazards.
Remove the key during the rework process.
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Do not operate or work on this machine unless you have read and understand the instructions and warnings in the Operation and Maintenance Manual. Failure to follow the instructions or heed the warnings could result in injury or death. Contact your Caterpillar dealer for replacement manuals. Proper care is your responsibility. |
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Personal injury or death can result from sudden machine movement. Sudden movement of the machine can cause injury to persons on or near the machine. To prevent injury or death, make sure that the area around the machine is clear of personnel and obstructions before operating the machine. |
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Accidental engine starting can cause injury or death to personnel working on the equipment. To avoid accidental engine starting, disconnect the battery cable from the negative (−) battery terminal. Completely tape all metal surfaces of the disconnected battery cable end in order to prevent contact with other metal surfaces which could activate the engine electrical system. Place a Do Not Operate tag at the Start/Stop switch location to inform personnel that the equipment is being worked on. |
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Personal injury or death can result from improper assembly procedures. Do not attempt any assembly until you have read and understand the assembly instructions. |
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Required Parts
| Required Parts List | ||
|---|---|---|
| Qty | Part Number | Description |
| 1 | 444-9930 | Cab Harness As (Display Panel Ground) |
| 1 | 452-2973 | Harness As (Fuel Sender Ground) |
Display Panel Rework Procedure
- Locate the display panel harness connector (2) at the rear side of the display panel. Disconnect the display panel harness connector.
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| Illustration 2 | g03420575 |
- Disconnect the display panel harness connector.
- Identify both of the black cables #200 (3) at the connector. One black cable is at terminal 6 and the other black cable is at terminal 8.
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| Illustration 3 | g03420583 |
- Pry and remove the red color pin holder (4) .
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| Illustration 4 | g03420587 |
- Remove both black color cables #200 (5) from the connector.
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| Illustration 5 | g03420592 |
- Cut off the connector pins and wrap the ground wires with electrical tape.
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| Illustration 6 | g03420596 |
- Insert and secure 444-9930 Cab Harness As (6) into terminal 6 and install the red color pin holder.
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| Illustration 7 | g03420894 |
- Route the 444-9930 Cab Harness As together with the display panel harness. Use cable straps where necessary.
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| Illustration 8 | g03420905 |
- Route the 444-9930 Cab Harness As to the rear of the air conditioning ducts.
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| Illustration 9 | g03421258 |
- Pull out the 444-9930 Cab Harness As at the bottom and continue to lay toward the rear of the cab seat beside the air duct. Use the existing clip (7) to tie together with the other harness as shown in Illustration 10
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| Illustration 10 | g03421406 |
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| Illustration 11 | g03421605 |
- Continue to route the cable below the cab radio. Use the existing clip (7) to tie together with the other harness as shown in Illustration 12
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| Illustration 12 | g03421625 |
- Identify the yellow color main harness that runs under the cab. Continue to lay this cable together with this main yellow harness and run under the cab as shown in Illustration 13
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| Illustration 13 | g03421641 |
- Connect the end of the cable to the chassis ground terminal. Use the existing clip to tie together as shown in Illustration 14.
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| Illustration 14 | g03421688 |
Fuel Sender Rework Procedure
- Locate and disconnect the fuel sender connector as shown.
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| Illustration 15 | g03642377 |
- Identify and remove the fuel sender ground cable (black) from the connector.
- Cut off the connector pin and wrap the ground wire with electrical tape.
- Insert and assemble the new 452-2973 Harness As (ground) into the fuel sender connector.
- Connect the other end of the new fuel sender harness ground cable to the battery isolator ground terminal as shown.
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| Illustration 16 | g03642375 |
- Secure the new harness to the ground cable with cable straps.