HOSE AS 3446935 - Caterpillar

EID 1489 Aggressive Brake System ResponseEvent code EID 1489 Aggressive Brake System Response occurs with varying levels of severity. Based on the severity, the autonomous mining truck (AMT) will respond in different ways: logging but continuing normal operation, limiting machine speed, or AMT coming to a complete stop. This event code could be caused by wear in the wheels, tires or suspension systems, incorrect calibration or a problem in the braking system. Follow this procedure if an event EID 1489 Aggressive Brake System Response occurs.Note: Ensure that all diagnostic codes have been cleared before beginning this procedure.Test Step 1. VISUALLY INSPECT CONDITION OF WHEELS, TIRES AND SUSPENSION.
Wheels.
No misalignment as viewed from ahead or behind.
No damaged, bent, or broken components.
Tires.
Free of numerous major pock marks on the tread.
Minimal cracks in the tread and sidewall, and If there are tracks, no steel ply visible.
Suspension.
Chrome is not damaged.
Minimal amounts of caked on or solid debris.
Only insignificant amounts of leakage.Expected Result:No visually apparent problems or defects noticeable.Results:
Problems visually apparent with the wheels. - Proceed to Test Step 2.
Problems visually apparent with the tires. - Proceed to Test Step 3.
Problems visually apparent with the suspension. - Proceed to Test Step 4.
No visually apparent problems or defects noticeable. - Proceed to Test Step 5.Test Step 2. CORRECT VISUAL PROBLEMS WITH THE WHEELS.
Correct visually found defects
No misalignment as viewed from ahead or behind.
No damaged, bent, or broken components.
Reference Front Wheels base truck manual.
Disassembly and Assembly, UENR1142, "793F Off-Highway Truck (Command For hauling) Machine Systems"
Troubleshooting, UENR2227, "793F Series CMD Off-Highway Truck/Tractor (Command for hauling) Steering Electronic Control System"
Reference Rear Wheels base truck manual.
Disassembly and Assembly, UENR1143, "793F Off-Highway Truck (Command For hauling) Power Train"
Troubleshooting, UENR2209, "793F CMD Off-Highway Truck (Command for hauling) Power Train Electronic Control System"Expected Result:Visual problems and defects corrected.Results:
Visual problems and defects corrected for wheels only. - Proceed to Test Step 8.
Visual problem and defects corrected for wheels but remain for tires and suspension. - Proceed to Test Step 3.Test Step 3. CORRECT VISUAL PROBLEMS WITH THE TIRES.
Check tires.
Free of numerous major pock marks on the tread.
Minimal cracks in the tread and sidewall, and If there are tracks, no steel ply visible.
Correct problems.
Consult documentation from tire manufacturer.
Front Wheels: Disassembly and Assembly, UENR1142, "793F Off-Highway Truck (Command For hauling) Machine Systems"
Rear Wheels: Disassembly and Assembly, UENR1143, "793F Off-Highway Truck (Command For hauling) Power Train"Expected Result:Visual problems and defects corrected.Results:
Visual problems and defects corrected for tires only. - Proceed to Test Step 8.
Visual problem and defects corrected for wheels and /or tires but problems remain with suspension. - Proceed to Test Step 4.Test Step 4. CORRECT VISUAL PROBLEMS WITH THE SUSPENSION.
Check suspension and correct problems.
Special Instruction, SEHS9411, "Servicing the Suspension Cylinders for Off-Highway Trucks" Expected Result:Visual problems and defects corrected.Results:
Visual problems and defects corrected for suspension only. - Proceed to Test Step 8.
Visual problem and defects corrected for wheels, tires, and /or suspension. - Proceed to Test Step 8.Test Step 5. COLLECT DIAGNOSTIC DETAIL INFORMATION.
Open Cat MineStar System client.
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