07-08-2025, 08:31 PM
The 1986 CAT 973 is a classic tracked loader, and operators may face common technical issues while using this machine. This article summarizes these issues and offers effective solutions to help users maintain and operate their equipment more efficiently.
Problem Description: Hydraulic System Failure
Some operators have reported hydraulic system failures, which result in improper functioning of the loader’s lift arms and other hydraulically driven components. This issue can significantly affect the machine's performance and, in some cases, cause the machine to stop working entirely.
Common Causes: Hydraulic Oil Contamination or Leaks
A common cause of hydraulic system failure is contamination of the hydraulic oil or leaks in the system. If the hydraulic oil contains impurities or the system has leakage problems, it will lead to insufficient hydraulic pressure, which in turn affects the machine's normal operation. The first step in diagnosing the issue is to check the quality of the hydraulic oil and the integrity of the system’s seals.
Solution: Replace Hydraulic Oil and Check Seals
To address hydraulic system issues, operators should first inspect the hydraulic oil's condition. Replace any contaminated oil and ensure that the oil meets the required specifications. Additionally, check the seals in the system, especially around oil lines and joints, for leaks. Replace any damaged seals as needed. Regularly changing the hydraulic oil and filters will also help prevent contamination.
Problem Description: Difficulty Starting the Engine
Some users report difficulty starting their 1986 CAT 973, with the engine either struggling to start or failing to start altogether. This issue can decrease machine productivity, especially when frequent use is required.
Common Causes: Low Battery Voltage or Fuel Supply Issues
One common cause of starting issues is a weak or aging battery. Over time, batteries lose their charge capacity, making it difficult to supply the necessary power to start the engine. Additionally, problems within the fuel system, such as a malfunctioning fuel pump or clogged fuel filter, can prevent the engine from starting properly.
Solution: Inspect the Battery and Fuel System
To solve starting issues, the first step is to check the battery’s voltage. Ensure the battery is fully charged and capable of providing enough power to start the engine. If the battery is old or damaged, it should be replaced. Next, inspect the fuel system to ensure the fuel pump is operating correctly, the fuel filter isn’t clogged, and the fuel lines are clear. Any issues with the fuel system should be repaired or replaced immediately.
Conclusion: Regular Inspection and Maintenance
The CAT 973 is a reliable piece of equipment, but to ensure its long-term, stable operation, operators must perform regular checks and maintenance. By addressing common issues such as hydraulic system problems, engine starting difficulties, and battery or fuel system malfunctions promptly, operators can significantly extend the machine's service life and improve its operational efficiency.
Problem Description: Hydraulic System Failure
Some operators have reported hydraulic system failures, which result in improper functioning of the loader’s lift arms and other hydraulically driven components. This issue can significantly affect the machine's performance and, in some cases, cause the machine to stop working entirely.
Common Causes: Hydraulic Oil Contamination or Leaks
A common cause of hydraulic system failure is contamination of the hydraulic oil or leaks in the system. If the hydraulic oil contains impurities or the system has leakage problems, it will lead to insufficient hydraulic pressure, which in turn affects the machine's normal operation. The first step in diagnosing the issue is to check the quality of the hydraulic oil and the integrity of the system’s seals.
Solution: Replace Hydraulic Oil and Check Seals
To address hydraulic system issues, operators should first inspect the hydraulic oil's condition. Replace any contaminated oil and ensure that the oil meets the required specifications. Additionally, check the seals in the system, especially around oil lines and joints, for leaks. Replace any damaged seals as needed. Regularly changing the hydraulic oil and filters will also help prevent contamination.
Problem Description: Difficulty Starting the Engine
Some users report difficulty starting their 1986 CAT 973, with the engine either struggling to start or failing to start altogether. This issue can decrease machine productivity, especially when frequent use is required.
Common Causes: Low Battery Voltage or Fuel Supply Issues
One common cause of starting issues is a weak or aging battery. Over time, batteries lose their charge capacity, making it difficult to supply the necessary power to start the engine. Additionally, problems within the fuel system, such as a malfunctioning fuel pump or clogged fuel filter, can prevent the engine from starting properly.
Solution: Inspect the Battery and Fuel System
To solve starting issues, the first step is to check the battery’s voltage. Ensure the battery is fully charged and capable of providing enough power to start the engine. If the battery is old or damaged, it should be replaced. Next, inspect the fuel system to ensure the fuel pump is operating correctly, the fuel filter isn’t clogged, and the fuel lines are clear. Any issues with the fuel system should be repaired or replaced immediately.
Conclusion: Regular Inspection and Maintenance
The CAT 973 is a reliable piece of equipment, but to ensure its long-term, stable operation, operators must perform regular checks and maintenance. By addressing common issues such as hydraulic system problems, engine starting difficulties, and battery or fuel system malfunctions promptly, operators can significantly extend the machine's service life and improve its operational efficiency.
