The John Deere 855 is a reliable compact utility tractor, but it can experience common issues like engine starting problems, hydraulic system failures, transmission issues, overheating, electrical faults, PTO malfunctions, and brake problems. These can often be fixed by checking and maintaining components such as the battery, fuel system, hydraulic fluid, coolant levels, wiring, and brake pads. Regular maintenance and addressing issues promptly can help keep the tractor in good working condition for longer.
In this article, we’ll explore these common problems, how to fix them, and offer tips on maintaining your tractor for the long run.
1. Engine Starting Issues
One of the most common problems reported with the John Deere 855 is difficulty starting the engine. Whether it’s a slow crank, no crank at all, or intermittent starting issues, engine starting problems can be frustrating. Several factors can contribute to this issue:
Possible Causes:
- Battery Issues: A weak or dead battery is the most common reason for engine starting issues. The battery may have lost its charge or may need replacing.
- Fuel System Problems: If the fuel filter is clogged or the fuel lines are blocked, fuel may not reach the engine properly, causing starting problems.
- Ignition Switch Failure: Sometimes, the ignition switch wears out, making it difficult to start the tractor.
- Starter Motor Issues: A faulty starter motor can prevent the engine from turning over.
How to Fix:
- Check and Charge the Battery: Ensure the battery terminals are clean and the battery is fully charged. If the battery is old, consider replacing it with a new one.
- Inspect Fuel System: Check the fuel filter for clogs and replace it if necessary. Inspect the fuel lines to ensure there are no blockages or leaks.
- Test the Ignition Switch: If the ignition switch seems faulty, test it using a multimeter to ensure it’s functioning correctly. Replace if needed.
- Examine the Starter Motor: If you suspect the starter motor is the problem, have it tested by a professional mechanic. If it’s faulty, a replacement may be required.
2. Hydraulic System Problems
Another common issue with the John Deere 855 is related to its hydraulic system. This system controls essential functions like lifting attachments, steering, and operating the loader. When the hydraulic system malfunctions, it can significantly affect the tractor’s performance.
Possible Causes:
- Low Hydraulic Fluid: Low fluid levels can lead to poor hydraulic performance or complete system failure.
- Air in the Hydraulic System: Air trapped in the hydraulic lines can cause the system to operate poorly, resulting in erratic movement.
- Worn Hydraulic Pump: If the hydraulic pump is worn or damaged, it can lead to weak or non-functioning hydraulics.
- Leaking Hydraulic Lines: Hydraulic lines can develop leaks over time, leading to reduced pressure and poor performance.
How to Fix:
- Check and Refill Hydraulic Fluid: Always check the hydraulic fluid level before operating the tractor. If it’s low, refill it to the recommended level using the correct type of hydraulic fluid.
- Bleed the Hydraulic System: If air is trapped in the hydraulic system, bleeding the lines can help restore proper function. Follow the manufacturer’s instructions to safely bleed the system.
- Inspect the Hydraulic Pump: If the pump is the issue, it may need to be repaired or replaced. Consult a professional mechanic for a thorough inspection.
- Replace Leaky Hydraulic Lines: Inspect the hydraulic hoses for leaks. If you find any, replace the faulty lines to restore pressure and functionality.
3. Transmission Problems
Transmission issues are another common problem faced by John Deere 855 owners. These problems can range from grinding gears to a complete inability to shift gears.
Possible Causes:
- Low Transmission Fluid: Insufficient transmission fluid can cause rough shifting or make it difficult to engage the gears.
- Worn Clutch: A worn clutch can lead to difficulty in shifting or slipping gears.
- Transmission Wear and Tear: Over time, the transmission components may wear out, especially if the tractor is frequently used for heavy-duty tasks.
How to Fix:
- Check Transmission Fluid: Make sure the transmission fluid level is adequate. Top it off if necessary, using the recommended fluid for the John Deere 855.
- Inspect the Clutch: If the clutch is worn, you may need to replace it. Regular clutch inspection can prevent long-term transmission damage.
- Transmission Overhaul: If the transmission is severely worn, a complete overhaul may be needed. Consult a professional mechanic for a thorough inspection and repair.
4. Overheating Issues
Overheating is a common problem for John Deere 855 tractors, especially during extended periods of use or when operating in hot weather. Overheating can lead to engine damage if not addressed promptly.
Possible Causes:
- Clogged Radiator: Dirt, debris, and dust can accumulate in the radiator, reducing its cooling efficiency.
- Low Coolant Levels: A lack of coolant in the system can cause the engine to overheat.
- Faulty Thermostat: If the thermostat is stuck closed, it won’t allow coolant to flow properly, causing the engine to overheat.
- Fan Belt Issues: A loose or broken fan belt can prevent the fan from cooling the engine effectively.
How to Fix:
- Clean the Radiator: Regularly clean the radiator to ensure that air can flow freely. Use compressed air or water to remove any debris.
- Check Coolant Levels: Always keep an eye on the coolant levels. If the coolant is low, refill it with the appropriate mixture of antifreeze and water.
- Replace the Thermostat: If the thermostat is faulty, replace it to ensure proper coolant flow.
- Inspect the Fan Belt: Check the fan belt for signs of wear or looseness. Replace it if necessary to maintain proper engine cooling.
5. Electrical Problems
Electrical issues can manifest in various ways, such as malfunctioning lights, gauges, or even failure to start. The electrical system in the John Deere 855 is critical to its overall operation.
Possible Causes:
- Loose or Corroded Wiring: Over time, the tractor’s wiring can become loose or corroded, leading to electrical failures.
- Blown Fuses: A blown fuse can disable important electrical components.
- Faulty Alternator: A malfunctioning alternator can lead to battery charging problems and electrical issues.
How to Fix:
- Inspect the Wiring: Check all wiring for signs of damage, looseness, or corrosion. Tighten any loose connections and clean any corroded terminals.
- Replace Blown Fuses: If you discover a blown fuse, replace it with one of the correct amperage.
- Test the Alternator: If the alternator is faulty, it may need to be repaired or replaced. Use a multimeter to test its output and consult a professional mechanic if necessary.
6. PTO (Power Take-Off) Problems
The Power Take-Off (PTO) system in the John Deere 855 is essential for operating attachments like mowers and tillers. When the PTO isn’t working correctly, these attachments may not function properly.
Possible Causes:
- Worn PTO Clutch: If the PTO clutch is worn, it may not engage properly, preventing the PTO from operating.
- Electrical Issues: The PTO system relies on electrical components, so a wiring issue or faulty switch can cause PTO failure.
- PTO Shaft Issues: The PTO shaft may become bent or damaged, affecting its operation.
How to Fix:
- Inspect the PTO Clutch: If the clutch is worn, you may need to replace it to restore proper function.
- Check Electrical Connections: Ensure all electrical connections related to the PTO system are secure and free of corrosion.
- Examine the PTO Shaft: If the shaft is damaged, replace it to ensure smooth PTO operation.
7. Brake Problems
Brake issues can compromise the safety of your John Deere 855. Common problems include poor braking performance or unresponsive brakes.
Possible Causes:
- Worn Brake Pads: Over time, brake pads wear out and need replacement.
- Low Brake Fluid: Insufficient brake fluid can cause poor brake performance.
- Damaged Brake Lines: Leaks in the brake lines can reduce braking power.
How to Fix:
- Replace Brake Pads: If the brake pads are worn, replace them to restore proper braking performance.
- Check Brake Fluid: Always ensure the brake fluid is at the recommended level. Top it off if necessary.
- Inspect Brake Lines: Check for leaks in the brake lines and replace any damaged lines to ensure safe braking.
Conclusion
The John Deere 855 is a durable and efficient tractor, but like all machinery, it can encounter problems over time. By understanding these common issues and knowing how to fix them, you can keep your tractor running smoothly for years to come. Regular maintenance, timely repairs, and attention to small problems before they become bigger ones will ensure your John Deere 855 stays in optimal condition.
Remember, always consult your owner’s manual for specific maintenance guidelines, and when in doubt, seek professional assistance to avoid causing further damage to your tractor.
