LINK-TRACK 1M9001 - Caterpillar

Problem List
"Brake Does Not Engage"
"The Brakes Do Not Release"The Brake Does Not Engage
If the brakes are applied and the machine does not slow down or if the machine does not stop, follow this procedure.Initially, a check of the brake pressure guides the diagnosis of the problem to the brakes or to the brake control valve.If the brake pressure is correct then the brake control valve is eliminated as the probable cause of the problem. Thus, the brakes are the probable cause.If the brake pressure is not correct then the brake control valve is the probable cause of the problem. If the brake pressure is corrected and the symptom still exists, then the brakes could be the second contributor of the problem.
Check the brake pressure.ReferenceFor the 583T, refer to Specifications, Systems Operations, Testing and Adjusting, RENR7517, "Brake Pressure - Test".Expected Results
The pressure is correct.Results
OK: Since the pressure at the brake control valve is correct the brake control valve is eliminated as the cause of the problem. The probable cause of the problem is the brakes. Proceed to Step 2.
NOT OK: The brakes are engaged by spring force. The brakes are released by oil pressure which is sent from the brake control valve to the brakes. Therefore, high oil pressure from the brake control valve to the brakes is a probable cause of the symptom. Proceed to Step 4.
Check the brakes.
Disassemble the brakes.
Check these components of the brakes for failure: seals, splines, friction discs and brake plates
If necessary, replace any components that are damaged.
Make sure that brakes are getting lubrication.
Calibrate the brakes.ReferenceFor the 583T, refer to Specifications, Systems Operations, Testing and Adjusting, RENR7517, "Calibration" for the appropriate calibration procedure.Expected Results
The original problem is resolved.Results
OK: Stop.
NOT OK: Stop. The probable causes that were analyzed in this procedure did not identify the cause of the problem. Use the information from the original problem to troubleshoot. Go to Step 2.e.
Replace the proportional solenoid valves.
Replace the proportional solenoid valves.
Check the operation of the machine for the original problem.Expected Results
The original problem is resolved.Results
OK: Calibrate the brakes.ReferenceFor the 583T, refer to Specifications, Systems Operations, Testing and Adjusting, RENR7517, "Calibration" for the appropriate calibration procedure.
NOT OK: The brake pressure is not correct. Therefore, the cause of the problem is caused by something in the brake control valve. The proportional solenoid valve was eliminated as the cause. Proceed to Step 4.
Manually inspect the brake control valve.
Disassemble the brake control valve and inspect the valve for damage.
Repair the components and/or replace the components, if necessary.
Calibrate the brakes.ReferenceFor the 583T, refer to Specifications, Systems Operations, Testing and Adjusting, RENR7517, "Calibration" for the appropriate calibration procedure.Expected Results
The original problem is resolved.Results
OK: Stop.
NOT OK: The cause of the problem is uncertain. Please call technical support with the information that has been gathered.The Brakes Do Not Release
Follow this procedure if the machine does not move or if the machine moves slowly.Initially, make sure that the symptom is active. If the symptom is intermittent then a probable cause is oil contamination.Note: Neutral default