- Off-Highway Truck/Tractor:
- 789D (S/N: SPD1-UP; SHH1-UP)
Introduction
This special instruction provides the required parts and the correct procedure to update the radio to antenna cables on certain 789D Off-Highway Trucks.
Important Safety Information
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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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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. If the tools, the procedure, and the work method are not recommended by Caterpillar, ensure that the tools, the procedure, and the work method are safe for everyone.
Ensure that the product will not be damaged or the product will be made unsafe by the operation, lubrication, maintenance, or the repair procedures.
Prepare the Machine for Maintenance
- Permit only one operator on the machine. Either keep other personnel away from the machine, or keep other personnel in the sight of the operator.
- Move the machine to a smooth horizontal location. Move the machine away from any machines that are working and any personnel. The surface must be solid enough to support the weight of the machine and any tooling that is used to support the machine.
- Move the transmission control to the NEUTRAL position.
- Move the parking brake switch to the ON position in order to engage the parking brakes. Turn the engine start switch to the OFF position in order to stop the engine.
- Turn the battery disconnect switch to the OFF position. Remove the key.
- Place chocks in front of the wheels and behind the wheels. Refer to Operation and Maintenance Manual, SEBU8242, "Use of Wheel Chocks" for more information.
- When the use wheel chocks are not possible, ensure that the machine is unable to roll. Turning the wheels into a suitable bank, or place the wheels in a suitable ditch.
- Review the information in Operation and Maintenance Manual, SEBU8242, "Welding on Machines and Engines with Electronic Controls".
Required Parts
| Required Parts | |||
|---|---|---|---|
| Item | Qty | Part Number | Description |
| 1 | 20 | 204-2281 | Cable Strap |
| 2 | 1 | 398-1793 | Cable As |
Procedure to Update the Antenna Cable Assembly
- Disconnect cable assembly (A) from antenna (B) .
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| Illustration 1 | g03852661 |
View of the left-hand side of the cab (A) Cable assembly (B) Antenna (C) Clipping | |
- Remove cable assembly (A). All clipping (C) will be retained and reused in the same location.
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| Illustration 2 | g03852705 |
View of underneath the left-hand side of the cab (A) Cable assembly (C) Clipping | |
- Remove and retain cover assembly (D).
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| Illustration 3 | g03852782 |
View of the rear side of the cab (D) Cover assembly | |
- Remove cable assembly (A) from the cab and discard.
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| Illustration 4 | g03852847 |
View inside the rear of the cab (A) Cable assembly | |
- Remove screen group (E). Retain screen group (E) and mounting hardware.
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| Illustration 5 | g03853389 |
(E) Screen Group | |
- Remove trim cover (F), the monitor (if equipped), and disconnect the wiring groups from the switches. Retain trim cover (F) and mounting hardware and monitor.
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| Illustration 6 | g03853406 |
View of the radio and control panel (F) Trim cover | |
- Remove cover (G). Retain cover (G) and mounting hardware.
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| Illustration 7 | g03853423 |
View of the inside right-hand side of the cab (G) Cover | |
- Remove cover (H). Retain cover (H) and mounting hardware.
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| Illustration 8 | g03853461 |
View of the inside left-hand side of the cab (H) Cover | |
- Remove liner (K) and disconnect the speaker wires and light wire.
Note: When removing liner (K) from the inside of the cab use the door on the right-hand side of the cab.
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| Illustration 9 | g03853571 |
View of the liner in the cab. (K) Liner | |
- Remove cover (L). Retain cover (L) and mounting hardware.
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| Illustration 10 | g03854244 |
View of the inside of the cab behind the operator seat (L) Cover | |
- Remove and discard coaxial cable assembly (M). Refer to Illustration 11 and Illustration 12.
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| Illustration 11 | g03854301 |
View of the inside of the cab behind the operator seat (M) Coaxial cable assembly | |
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| Illustration 12 | g03855021 |
View of the left-hand side of the cab without the liner | |
- Install cable assembly (2) onto antenna (B) and secure cable assembly using retained clipping (C) and cable straps (1) .
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| Illustration 13 | g03854436 |
View of the left-hand side of the cab (B) Antenna (C) Clipping (1) Cable strap (2) Cable assembly | |
- Route cable assembly (2) under the left-hand platform and up through the grommet into the backside of the cab. Secure cable assembly (2) using retained clipping (C) and cable straps (1) .
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| Illustration 14 | g03854602 |
View of underneath the left-hand side of the cab (C) Clipping (1) Cable strap (2) Cable assembly | |
- Continue to route cable assembly (2) along the frame of the cab assembly up through grommet (N) .
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| Illustration 15 | g03855079 |
View inside the rear left-hand side of the cab (N) Grommet (2) Cable assembly | |
- Continue to route cable assembly (2) along the back left-hand side of the cab as shown in Illustration 16.
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| Illustration 16 | g03855179 |
View of the inside of the cab behind the operator seat (2) Cable assembly | |
- Route cable assembly (2) along the left-hand side and around the front to the radio opening.
Note: Leave at least 76 mm (3.00 inch) to 127 mm (5.00 inch) of cable assembly (2) outside of the radio opening.
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| Illustration 17 | g03855571 |
View of the left-hand side and front of the cab (2) Cable assembly | |
- Connect the wiring group to switches and install trim cover (F) .
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| Illustration 18 | g03856445 |
View of the radio compartment and control panel | |
- Connect the wiring group to the monitor and reinstall the monitor (if equipped).
- Connect the radio power cable and the antenna cable assembly to the radio and install the radio.
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| Illustration 19 | g03856418 |
View of installed blue-tooth radio | |
- Secure the cables along using cable straps (1) .
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| Illustration 20 | g03856450 |
View of the left-hand side of the cab (1) Cable strap | |
- Connect speaker wires, light wire and install liner (K) .
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| Illustration 21 | g03856480 |
View of the cab liner | |
- Install cover (G) and cover (H) .
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| Illustration 22 | g03856483 |
View of the inside right-hand side of the cab (G) Cover | |
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| Illustration 23 | g03856485 |
View of the inside left-hand side of the cab (H) Cover | |
- Install cover (L) .
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| Illustration 24 | g03856496 |
View of the inside of the cab behind the operator seat (L) Cover | |
- Coil up excess cable assembly (2) and secure with cable straps (1) .
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| Illustration 25 | g03856498 |
View inside the rear of the cab (1) Cable strap (2) Cable assembly | |
- Install cover assembly (D) .
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| Illustration 26 | g03856502 |
View of the rear of the cab (D) Cover assembly | |