Troubleshooting the 655C Series II: Common Issues and Solutions

[MikePhua]

When it comes to heavy equipment, the John Deere 655C Series II is a reliable and powerful machine. However, like any other piece of machinery, it can face a variety of mechanical challenges as it ages. In this article, we will explore some of the common issues encountered with the 655C Series II, offering solutions and insights into how to troubleshoot and fix these problems. From hydraulic issues to electrical problems, this guide will provide you with a comprehensive understanding of the equipment's potential challenges.
1. Common Hydraulic System Issues
The hydraulic system is the heart of any construction or agricultural equipment, and the John Deere 655C Series II is no exception. Hydraulic problems can manifest in several ways, including sluggish or unresponsive controls, fluid leaks, or overheating of the hydraulic components.
A. Sluggish or Unresponsive Hydraulic Controls
One of the most commonly reported issues with the 655C Series II is sluggish or unresponsive hydraulic controls. This can occur when the hydraulic fluid is low or contaminated, leading to poor performance in the hydraulic system.

• Solution: The first step is to check the fluid levels. If they are low, top them up with the correct hydraulic fluid as per the machine’s manual. If the fluid looks dirty or contaminated, drain the system and replace the fluid. Afterward, replace the hydraulic filter to ensure optimal performance. If the issue persists, the problem could be due to a malfunctioning pump or valve, which may require professional inspection and repair.
  

B. Hydraulic Leaks
Leaks in the hydraulic system can lead to significant loss of fluid, affecting the overall functionality of the machine. Leaks can often be found around hose connections, cylinders, or the hydraulic pump.

• Solution: Inspect all hoses, fittings, and seals for any visible cracks, cuts, or loose connections. Tighten or replace damaged hoses and seals to prevent further leaks. For more severe leaks, it may be necessary to replace the hydraulic pump or cylinder, depending on the source of the leak.
  

C. Overheating of Hydraulic Components
Hydraulic overheating is another common issue, especially in high-use conditions. This can result in premature wear on hydraulic components and reduced efficiency of the entire system.

• Solution: To prevent overheating, ensure that the hydraulic fluid is clean and at the proper level. If the fluid is excessively hot, consider checking the hydraulic cooler or fan for blockages. Clean the cooler and ensure the fan is working correctly. Overheating can also be a sign of a failing hydraulic pump, so be sure to check this component for wear and tear.
  

2. Electrical Problems and Control Malfunctions
Electrical issues can be tricky to diagnose but are common in older machines like the 655C Series II. Problems with the machine's control systems, such as faulty sensors or electrical wiring, can lead to malfunctions or complete failure of critical functions.
A. Faulty Control Panel or Switches
The control panel in the 655C Series II can suffer from electrical glitches, making the machine unresponsive to operator commands. This issue may arise from faulty switches, corroded wiring, or malfunctioning relays.

• Solution: Begin by checking the fuses and wiring connections. Corroded or loose connections should be cleaned and re-tightened. If the control panel or switches appear worn or damaged, they may need to be replaced entirely. Be sure to use only genuine replacement parts to maintain the integrity of the electrical system.
  

B. Alternator or Battery Issues
Another common electrical issue is a failing alternator or battery. If the alternator is not charging the battery properly, the machine may experience intermittent power loss or difficulty starting.

• Solution: Start by testing the alternator to ensure it is generating the proper voltage. If the alternator is faulty, it will need to be replaced. If the battery is old or damaged, replace it with a new one. Additionally, clean the battery terminals to prevent any electrical resistance that could lead to starting issues.
  

C. Sensor Malfunctions
Modern machinery often relies on various sensors to regulate its performance. The 655C Series II is equipped with sensors that monitor fluid levels, engine temperature, and other vital systems. A malfunctioning sensor can cause incorrect readings or failure of the system it monitors.

• Solution: Inspect all sensors for signs of wear, corrosion, or damage. If a sensor is faulty, it should be replaced with a new one. Many sensors can be tested using a multimeter to determine if they are functioning correctly. In some cases, the machine’s computer system may need to be reset or reprogrammed.
  

3. Engine and Powertrain Issues
Engine-related issues can range from simple performance problems to more severe mechanical failures. Regular maintenance is key to preventing these types of problems in the John Deere 655C Series II.
A. Hard Starting or Stalling
If the machine is hard to start or stalls during operation, it could be caused by a number of issues, including fuel system problems, a dirty air filter, or a malfunctioning fuel pump.

• Solution: Start by checking the air filter. If it’s clogged, replace it with a new one. Next, inspect the fuel system for signs of clogging or contamination. A clogged fuel filter or malfunctioning fuel pump may be causing the engine to stall. Replace any parts that appear damaged. Ensure the battery is fully charged and that all electrical connections are tight and free from corrosion.
  

B. Low Engine Power
If the engine is running but not producing enough power, it could be a result of fuel delivery problems, clogged air filters, or engine misfiring.

• Solution: Begin by checking the fuel injectors. If they are clogged or malfunctioning, they can cause a loss of power. Clean or replace the injectors as needed. If the air filter is clogged, replace it. Additionally, inspect the exhaust system for blockages that could restrict airflow. In some cases, adjusting the engine timing or replacing spark plugs may resolve the issue.
  

C. Transmission or Gearbox Problems
Transmission problems are not uncommon in older machinery, and the 655C Series II can experience difficulties with shifting gears, slipping, or a loss of power transmission.

• Solution: Check the transmission fluid level and condition. Low or contaminated fluid can cause shifting problems. If the fluid is in poor condition, drain and replace it. If the problem persists, there may be internal damage to the gearbox or transmission components that requires professional repair or replacement.
  

4. Preventative Maintenance and Best Practices
To avoid some of these common issues with the John Deere 655C Series II, regular maintenance is crucial. Below are a few key practices to keep the machine in top shape:

• Regular Fluid Changes: Ensure that engine oil, hydraulic fluid, and transmission fluid are changed at the recommended intervals. This helps keep the internal components lubricated and prevents excessive wear.
  
• Filter Replacements: Regularly replace air, fuel, and hydraulic filters to ensure that the system is running efficiently and to prevent contamination of the fluids.
  
• Daily Inspections: Conduct a thorough daily inspection of the machine before use. Check for leaks, loose bolts, and signs of wear, and address any issues immediately to prevent them from worsening.
  

5. Conclusion
The John Deere 655C Series II is a robust and capable machine, but like all heavy equipment, it can face various issues as it ages. From hydraulic system failures to electrical malfunctions and engine troubles, understanding the common problems and knowing how to troubleshoot them is key to maintaining a reliable and efficient machine. Regular maintenance, timely repairs, and proper care can help extend the life of your equipment, ensuring it continues to perform at its best on the job site for years to come.