The John Deere LT155 is a well-loved lawn tractor known for its durability and efficient performance. However, like any piece of machinery, it isn’t immune to issues. Regular maintenance and an understanding of common problems can help keep your mower running smoothly and extend its lifespan.
In this blog post, we will explore six common problems that owners of the John Deere LT155 may encounter. For each issue, we will provide an in-depth analysis of the potential causes and offer practical solutions to fix them. Whether you’re dealing with engine starting issues, uneven cutting, transmission problems, overheating, steering difficulties, or electrical problems, this guide will equip you with the knowledge to address and resolve these challenges effectively.
John Deere LT155 Problems and Test Drive
1. Engine Starting Issues
Problem Description
Many John Deere LT155 owners experience difficulty starting the engine. This issue can be frustrating, especially when you need to mow your lawn quickly.
Analysis
There are several potential causes for engine starting problems. These include:
- Battery Issues: The battery may be dead, corroded, or have loose connections. A weak battery won’t supply enough power to start the engine.
- Fuel System Problems: Stale or contaminated fuel can clog the fuel lines or carburetor, preventing the engine from starting. A faulty fuel pump can also be the culprit.
- Spark Plug Issues: A dirty or worn-out spark plug can fail to ignite the fuel mixture in the engine, leading to starting problems.
Solutions
Follow these step-by-step troubleshooting and maintenance tips to resolve engine starting issues:
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Check the Battery:
- Ensure the battery terminals are clean and free of corrosion. Use a wire brush to clean any buildup.
- Tighten any loose connections to ensure a strong electrical connection.
- Test the battery’s charge with a multimeter. If the voltage is low, recharge or replace the battery.
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Inspect the Fuel System:
- Use fresh fuel to avoid problems with stale gasoline. Old fuel can cause the engine to run poorly or not start at all.
- Check the fuel filter for clogs. Replace it if necessary.
- Ensure the fuel lines are clear and not blocked. Clean or replace them if needed.
- If the fuel pump is faulty, consider replacing it.
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Examine the Spark Plug:
- Remove the spark plug and inspect it for dirt, oil, or carbon buildup. Clean it with a wire brush or replace it if it is damaged or worn out.
- Check the spark plug gap with a feeler gauge. Adjust it to the manufacturer’s specifications if necessary.
- Reinstall the spark plug and ensure it is tightly secured.
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2. Uneven Cutting
Problem Description
Uneven cutting is a common issue with the John Deere LT155. The mower does not cut the grass evenly, leading to a patchy and unsightly lawn.
Analysis
Several factors can cause uneven cutting. Here are the most common ones:
- Dull Blades: Blades that are not sharp will not cut the grass properly. This can result in a ragged and uneven cut.
- Unbalanced Deck: If the mower deck is not level, one side may cut lower than the other. This imbalance creates an uneven appearance.
- Improper Tire Pressure: When tire pressure is incorrect, the mower may sit unevenly. This affects the height and evenness of the cut.
Solutions
To fix uneven cutting, follow these simple steps:
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Sharpen or Replace Blades:
- Remove the blades from the mower. Use a wrench to loosen the bolts holding the blades in place.
- Sharpen the blades using a grinder or sharpening tool. Make sure to sharpen both sides evenly.
- If the blades are too worn or damaged, replace them with new ones.
- Reattach the blades securely.
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Level the Mower Deck:
- Park the mower on a flat surface. Turn off the engine and ensure it is stable.
- Measure the height of the deck on both sides. Use a ruler or measuring tape.
- Adjust the deck height as needed. Most mowers have adjustment points near the wheels or under the deck.
- Ensure both sides of the deck are at the same height.
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Check Tire Pressure:
- Use a tire gauge to check the pressure in all four tires.
- Inflate the tires to the recommended pressure. This information can usually be found in the owner’s manual.
- Regularly check the tire pressure to maintain even cutting.
Read More: John Deere 1025r Rockshaft Problems With Solutions
3. Transmission Problems
Problem Description
Transmission problems are a frequent issue with the John Deere LT155. These problems can cause the mower to move poorly or not at all.
Analysis
There are several reasons why the transmission might not work correctly:
- Worn Belts: Over time, drive belts can wear out or break. This can stop the transmission from working properly.
- Low Transmission Fluid: The transmission needs enough fluid to operate smoothly. Low fluid levels can cause overheating and poor performance.
- Damaged Gears: Gears inside the transmission can wear down or break. This can lead to serious transmission issues.
Solutions
To fix transmission problems, follow these steps:
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Inspect and Replace Belts:
- Turn off the mower and ensure it is stable.
- Locate the drive belts. These are usually under the mower deck or near the transmission.
- Check the belts for signs of wear or damage. Look for cracks, fraying, or breaks.
- Replace any worn or damaged belts. Follow the instructions in the owner’s manual for proper belt installation.
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Check and Refill Transmission Fluid:
- Find the transmission fluid reservoir. This is usually located near the rear of the mower.
- Check the fluid level using the dipstick or sight gauge. The fluid should be at the full mark.
- If the fluid is low, refill it with the recommended type of transmission fluid. Use a funnel to avoid spills.
- After refilling, check for any leaks. Fix any leaks before using the mower again.
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Address Gear Issues:
- If you suspect damaged gears, you may need to open the transmission case. This can be complex, so consult the owner’s manual for guidance.
- Inspect the gears for wear or damage. Look for missing teeth or metal shavings.
- Replace any damaged gears. This may require special tools or professional assistance.
- Reassemble the transmission carefully, ensuring all parts are properly aligned.
Read More: John Deere 1026r Hydraulic Problems and Solutions
4. Overheating
Problem Description
Overheating is a common issue with the John Deere LT155. The engine gets too hot during use, which can cause it to shut down or get damaged.
Analysis
Several factors can cause the engine to overheat:
- Clogged Cooling Fins: Dirt and debris can block the cooling fins. This reduces airflow and causes the engine to overheat.
- Low Coolant Levels: Not having enough coolant can lead to overheating. The coolant helps keep the engine at the right temperature.
- Dirty Air Filters: A dirty or clogged air filter can restrict airflow to the engine. This can make the engine run hotter than normal.
Solutions
To fix overheating problems, follow these steps:
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Clean the Cooling Fins:
- Turn off the mower and let the engine cool down completely.
- Locate the cooling fins on the engine. They are usually on the sides of the engine block.
- Remove any dirt, grass, or debris from the cooling fins. Use a brush or compressed air to clean them thoroughly.
- Make sure the cooling fins are not bent or damaged. Straighten any bent fins carefully.
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Refill Coolant:
- Check the coolant level in the radiator. The radiator is usually located at the front of the engine.
- Remove the radiator cap and look inside. The coolant should be near the top of the radiator.
- If the coolant level is low, add the recommended type of coolant. Use a funnel to avoid spills.
- After adding coolant, replace the radiator cap securely.
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Replace or Clean the Air Filter:
- Locate the air filter housing. This is usually on the side of the engine, covered by a plastic or metal cover.
- Remove the cover and take out the air filter.
- Check the air filter for dirt and debris. If it is dirty, clean it with compressed air or wash it with water and mild soap. Let it dry completely before reinstalling.
- If the air filter is damaged or very dirty, replace it with a new one.
- Reinstall the air filter and secure the cover.
Read More: John Deere 1025r Transmission Problems and Solutions
5. Steering Difficulties
Problem Description
Many John Deere LT155 owners face steering difficulties. The mower becomes hard to steer or control, making lawn maintenance challenging.
Analysis
Steering problems can arise from several issues:
- Worn Steering Components: Parts like the steering gear or linkages can wear out over time. This wear makes steering less responsive.
- Misaligned Wheels: Wheels that are not aligned properly can cause steering issues. Misalignment affects the direction and ease of steering.
- Low Hydraulic Fluid: For models with hydraulic steering, low fluid levels can make steering tough and unresponsive.
Solutions
To fix steering difficulties, follow these steps:
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Inspect and Replace Steering Parts:
- Turn off the mower and ensure it is stable.
- Check the steering components. Look for worn or damaged parts like the steering gear, linkages, and bushings.
- If you find worn parts, replace them. Refer to the owner’s manual for the correct parts and replacement instructions.
- Lubricate moving parts to reduce friction and ensure smooth operation.
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Align the Wheels:
- Park the mower on a flat surface and turn off the engine.
- Measure the distance between the front wheels and the rear wheels. They should be equal or very close.
- If the wheels are misaligned, adjust them. Most mowers have adjustable tie rods or similar mechanisms for this purpose.
- After adjustment, recheck the alignment to ensure accuracy.
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Check Hydraulic Fluid Levels:
- Locate the hydraulic fluid reservoir. This is usually near the steering mechanism or under the hood.
- Check the fluid level using the dipstick or sight gauge.
- If the fluid level is low, add the recommended type of hydraulic fluid. Use a funnel to avoid spills.
- After refilling, check for any leaks. Fix any leaks before using the mower again.
Read More: John Deere 1025r Starting Problems With Troubleshooting Tips
6. Electrical Problems
Problem Description
Electrical problems are a common issue with the John Deere LT155. Owners may encounter issues such as lights not working or the battery not charging properly.
Analysis
Several factors can contribute to electrical problems:
- Faulty Wiring: Wiring that is damaged or improperly connected can disrupt the flow of electricity. This can lead to various electrical issues throughout the mower.
- Blown Fuses: Fuses protect electrical circuits from damage by breaking the circuit when too much current flows through. A blown fuse can cause lights or other electrical components to stop working.
- Bad Alternator: The alternator charges the battery while the engine is running. If the alternator is faulty, the battery may not receive a proper charge, leading to electrical problems.
Solutions
To address electrical problems, follow these steps:
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Inspect and Repair Wiring:
- Turn off the mower and disconnect the battery to prevent electrical shocks.
- Inspect the wiring harness for any signs of damage, such as frayed wires or loose connections.
- Repair or replace any damaged wiring. Use electrical tape or wire connectors to secure connections.
- Ensure all wiring is properly routed and secured to prevent future damage.
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Replace Fuses:
- Locate the fuse box on the mower. It is usually located under the dashboard or near the battery.
- Check each fuse for signs of damage, such as a broken filament or discoloration.
- Replace any blown fuses with ones of the same amperage rating. Be sure to use the correct type of fuse for your mower.
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Check the Alternator:
- Start the engine and let it run at idle speed.
- Use a multimeter to test the voltage output of the alternator. It should read between 13.5 and 14.5 volts.
- If the alternator is not producing the correct voltage, it may need to be replaced. Consult a professional for assistance with alternator replacement.
Read More: John Deere 1025r PTO Problems With Troubleshooting Steps
FAQs
What year was the John Deere LT155 made?
The John Deere LT155 was made in 1998. It was a popular model at the time and is still considered a classic today. Many people continue to use and love their LT155s.
What transmission is in a John Deere LT155?
The John Deere LT155 is a lawn tractor that was produced by the John Deere company from 1992 to 2001. The tractor came equipped with a hydrostatic transmission. Hydrostatic transmission is a type of transmission that uses oil to transfer power from the engine to the wheels.
The hydrostatic transmission is a very reliable transmission and is still used in many lawn tractors today.
Why does my John Deere mower keep cutting off?
If your John Deere mower keeps cutting off, there are a few possible reasons. The most common reason is that the mower’s blades are dull and need to be sharpened. Another possibility is that the mower’s air filter is dirty and needs to be replaced.
If the blades on your John Deere mower are dull, they will cause the engine to work harder, which can lead to the mower shutting off. To fix this problem, you will need to sharpen the blades. If the air filter on your mower is dirty, it will restrict airflow to the engine, which can also cause the mower to shut off.
To fix this problem, you will need to replace the air filter.
What motor does a John Deere LT155 have?
The John Deere LT155 is a lawn tractor that was produced by the John Deere company from 1998 until 2002. The tractor was equipped with a 15 horsepower (11 kW) Briggs & Stratton engine and a 42-inch (1,067 mm) mower deck. The LT155 was replaced by the John Deere LT160 in 2003.