- Wheel Loader:
- 993K (S/N: LWA1-UP; Z9K1-UP)
Introduction
The special instruction will provide replacement procedure of the STIC control bracket. The STIC control bracket has been redesigned in order to allow for more clearance of the wiring harness for the joystick assembly.
Important Safety Information
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.
Ensure that the product will not be damaged or the product will be made unsafe by the operation, lubrication, maintenance, or the repair procedures that are used.
Required Parts
| Part Required to Update 268-9348 STIC Control Gp | |||
| Item | Qty | New Part Number | Description |
| 16 | 1 | 268-9368 | Bracket As |
| 17 | 4 | 7k-1181 | Cable Straps |
| 18 | 4 | 8T-4908 | Bolts |
| 19 | 4 | 8T-4224 | Hard Washers |
Procedure to Rework 268-9348 STIC Control Gp
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Sudden movement or accidental starting of the machine can cause personal injury or death to persons on or near the machine. To prevent personal injury or death, perform the following: Park the machine on a smooth level surface. Lower the bucket and or attachments to the ground. Stop the engine and engage the parking brake. Block the wheels and install the steering frame lock. Turn the battery disconnect switch to the OFF position and remove the key. Place a Special Instruction, SEHS7332, "Do Not Operate" tag at the battery disconnect switch location to inform personnel that the machine is being worked on. |
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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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- 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 to an area that is away from operating machines and away from personnel.
- Move the transmission F-N-R control to the NEUTRAL position.
- Lower the work tools to the ground.
- Activate the parking brakes. Stop the engine and remove the ignition key.
- Turn the battery disconnect switch to OFF position.
- Place blocks in front of the wheels and behind the wheels.
- Position the lockout lever assembly (1) to the side in order to access the armrest latch lever assembly (2) .
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| Illustration 1 | g02313274 |
- Remove the latch lever assembly (2) and disconnect the latch release cable. Keep the armrest in the latched position.
- Remove the cover (3) and cover (4). Save the hardware.
- Remove the bracket (5) and hardware. Save the parts.
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| Illustration 2 | g02315573 |
- Disconnect the electrical connector (6) and electrical connector (7). Remove the cable straps (8) and discard.
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| Illustration 3 | g02315594 |
- Remove and discard the cable strap (8) that secures the latch release cable (9) to the steering control group mounting bracket.
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| Illustration 4 | g02315695 |
- Remove and discard the cable strap (8) that connects the joystick wiring harness (10) to the mounting bracket.
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| Illustration 5 | g02315716 |
- Support the pilot valve group (13) with a suitable support.
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| Illustration 6 | g02317573 |
- Remove the hardware (11) and plate (12). Save the parts. Leave the two lower bolts in the plate in order to retain the spacer and clips.
- Remove four bolts (14) and the bracket assembly (15). Discard the parts.
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| Illustration 7 | g02317595 |
- Assemble the pilot valve group (13) to the new bracket assembly (16) as shown in Illustration 8.
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| Illustration 8 | g02317653 |
- Install the plate (12) and hardware (11) to the pilot valve group (13) as shown in Illustration 9. Use the parts that were saved in Step 16. The top bolt must be installed from the bracket side. The two lower bolts are installed from the plate side. Tighten the bolts (12) to 28 ± 7 N·m (248 ± 62 lb in). Ensure that the spacer and clip on the lower left of the plate (12) are installed and that the clip is facing downwards.
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| Illustration 9 | g02317673 |
- Route the joystick wiring harness (10) through the hole in the new bracket assembly (16) and down. Attach the joystick wiring harness (10) to the new bracket assembly (16) with a new cable strap (17). Do not tighten the cable strap (17). Operate the joystick in each direction to ensure that the harness does not bind and tighten the cable strap (17) .
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| Illustration 10 | g02315902 |
Note: The joystick wiring harness to be routed through the bracket assembly before the bracket assembly is bolted to the armrest. The connector will not fit through the opening once the bracket is mounted to the armrest.
- Install the new bracket assembly (16) to the steering control support group with four new bolts (18) and four new hard washers (19) as shown in Illustration 11. Tighten the bolts (18) to 28 ± 7 N·m (248 ± 62 lb in).
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| Illustration 11 | g02317734 |
- Install the latch release cable (9) over the top left corner of the bracket assembly as shown in Illustration 12. Use the cable strap (17) to tie latch release cable with bracket assembly. This cable strap MUST be present or steering could become compromised.
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| Illustration 12 | g02317849 |
- Ensure that the steering lock moves freely and does not rub on the lock plate. Adjust the lock plate if needed. Any rubbing will cause the steering to jerk. Refer to Illustration 13.
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| Illustration 13 | g02317853 |
- Connect the electrical connector (6) and electrical connector (7) as shown in Illustration 14.
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| Illustration 14 | g02317855 |
- Ensure that no interference between joystick wiring harness and edge of the bracket assembly. Ensure that the wire bends are smooth. Make the connections to the mating harness and ensure positive connections.
- Install the bracket (5) as shown in Illustration 15. Use the parts that were saved in Step 11. Tighten the bolts to 12 ± 3 N·m (106 ± 27 lb in).
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| Illustration 15 | g02317893 |
- Connect the latch release cable to the latch lever assembly (2) as shown in Illustration 16.
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| Illustration 16 | g02317974 |
- Install the cover (3) and hardware as shown in Illustration 16. Use the cover (3) and hardware that were saved in Step 10. Tighten the screws (20) to 6 ± 1 N·m (53 ± 9 lb in).
- Install the cover (4) and hardware as shown in Illustration 17. Use the cover (4) and hardware that were saved in Step 10. Tighten the screws to (20) to 6 ± 1 N·m (53 ± 9 lb in).
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| Illustration 17 | g02318013 |
- Install two screws (21) as shown in Illustration 18. Use the hardware that were saved in Step 10. Tighten the screws (22) to 0.62 ± 0.10 N·m (5.49 ± 0.89 lb in).
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| Illustration 18 | g02318098 |
- Operate the steering joystick through full range of motion and check for smooth operation. Verify the operation of the transmission range selector button.
- Operate the console latch to verify correct operation.
- Operate the steering lock lever to ensure smooth engagement. Ensure that the lever is adjusted and does not cause the steering to jerk.