The John Deere X739 is a badass little 4×4 diesel lawn tractor that falls under the x700 series. It is way stronger than it’s gasoline-powered counterparts, and is commonly used for mowing lawns, hauling, and other ranch and yard tasks.
However, like any piece of equipment, it can fail at the worst possible time. There are 6 common problems that have been reported by users that may determine if you want to buy this lawn tractor or now. These problems affect components such as the transmission, engine, deck, and mower.
Some of the most common issues of the X739 include the transmission not engaging properly, engine stalling, and the deck not engaging. Other problems include the belt slipping, leaving uncut grass, and excessive vibration.
This troubleshooting guide will list the 6 common problems along with their solutions for this model lawn tractor. Let’s go!
If you run into any problems following this repair guide, remember there’s an excellent resource called Mechanic Answer, which let’s you chat with a live John Deere tractor mechanic for immediate help and step by step hand-holding
1. John Deere X739 Transmission may not engage properly
The most common problem reported by John Deere X739 users (and one that we have experienced ourslves) is that the transmission may not engage properly or feel broken, which can cause the lawn tracror to stall or move very slowly. This is no bueno and you can’t get any work done! But thankfully it’s an easy fix!
Symptoms
Users and owners of this model tractor have reported several symptoms related to this issue. The most obvious symptom is that the machine may stall or move very slowly when the transmission does not engage properly. Other issues that have been reported include the engine stalling, the deck not engaging, and the mower not self-propagating. These symptoms can affect the machine’s ability to perform tasks and can be frustrating for users.
Problems
The underlying problem causing these symptoms is that the transmission is not engaging properly. This can be due to a variety of reasons, including a defective main fuse, damaged ignition key, low battery voltage, faulty starter, or damaged wire connections. These problems can affect the lawn tractors ability to move and perform tasks.
How to Fix
Time and Tools Needed
The time it takes to fix this issue will vary depending on the specific problem causing it. You will need basic tools such as a multimeter, screwdrivers, and wrenches.
Steps for Fixing Each Specific Problem:
Fixing a Defective main fuse:
First, locate the main fuse. Note: you don’t have to be an electrician to do this. It’s easy peasy. It is usually located near the battery or in the fuse box. Check the main fuse using a multimeter to see if it is defective. If it is, remove the old fuse and replace it with a new one of the same amperage rating. After replacing the fuse, test the machine to see if the issue has been resolved.
Damaged ignition key: First, check the ignition key for any visible signs of damage such as cracks or wear. If the key is damaged, it will need to be replaced. To replace the key, you will need to purchase a new one from a John Deere dealer. Once you have the new key, insert it into the ignition and test the machine to see if the issue has been resolved.
Fixing Low battery voltage:
First, locate the battery and remove the battery cover. Using a multimeter, check the battery voltage. If it is low, you will need to charge or replace the battery. To charge the battery, connect it to a battery charger and follow the charger’s instructions. If the battery needs to be replaced, remove the old battery and install a new one of the same type and size. After replacing or charging the battery, test the machine to see if the issue has been resolved.
Fixing a Faulty starter:
First, locate the starter motor. It is usually located near the engine and can be identified by its cylindrical shape and wires connected to it. Check the starter for any visible signs of damage or wear. If it is damaged or worn, it will need to be replaced. To replace the starter, you will need to purchase a new one from a John Deere dealer. Once you have the new starter, remove the old one and install the new one following your operator’s manual instructions. After replacing the starter, test the machine to see if the issue has been resolved.
Fixing Damaged wire connections:
First, visually inspect all wire connections for any signs of damage or wear such as fraying or corrosion. If any wire connections are damaged or worn, they will need to be repaired or replaced. To repair a damaged wire connection, you will need to use wire strippers to strip away any damaged insulation and then use wire connectors to reconnect the wires.
If a wire connection needs to be replaced, you will need to purchase a new one from a John Deere dealer and install it following your operator’s manual instructions. After repairing or replacing any damaged wire connections, test the machine to see if the issue has been resolved.
2. John Deere X739 Engine Stalling
Engine stalling is a common problem reported by John Deere X739 owners, and it sucks quite frankly. It can be caused by a variety of issues, including problems with the transmission, fuel pump, governor, or air intake. Stalling can affect the lawn tractor’s ability to move or operate properly and can be frustrating for users. In this guide, we’ll discuss the symptoms of engine stalling, the underlying problems that can cause it, and how we have fixes these issues ourselves in the past.
Symptoms
Some common symptoms of engine stalling in the John Deere X739 include the engine losing power, hesitating or stalling when starting up, running rough when idling, or stalling when operating at low speeds. These symptoms can be caused by a variety of underlying problems and can affect the machine’s ability to move or operate properly.
Problems
There are several potential causes of engine stalling in the John Deere X739. One possibility is that the oil level is too high. High oil pressure ain’t always good! Removing any excess oil may help to resolve the problem. Another possibility is a defective fuel pump. Inspecting and repairing the fuel pump as needed may help to resolve the issue. Additionally, a defective governor can cause power loss. A dirty fuel filter can also restrict the flow of fuel to the engine, causing it to stall. Finally, it’s possible that the spark plugs are dirty or damaged and need to be replaced.
How to Fix
Time and Tools Needed: The time it takes to fix engine stalling issues in the John Deere X739 will vary depending on the specific problem (and how good or bad of a mechanic you are). Some fixes may only take a few minutes, while others may require more time. Tools needed may include a wrench, screwdriver, and replacement parts such as a fuel filter or spark plugs.
Steps for Fixing Each Specific Problem:
Fixing Oil Levels:
If the oil level is too high, first you need to locate the oil drain plug on the engine. Use a wrench to loosen the drain plug and allow any excess oil to drain out. Be sure to properly dispose of the used oil. Once the excess oil has been removed, use a dipstick to check the oil level and ensure that it is within the recommended range. Replace the drain plug and tighten it securely.
Fixing Fuel Pumps:
To inspect the fuel pump, first locate it on the engine. Check for any signs of damage or wear, such as cracks or leaks. If necessary, replace the fuel pump with a new one. To do this, first disconnect the fuel lines from the pump and remove any mounting bolts or screws. Install the new pump in place and reconnect the fuel lines. Be sure to tighten all bolts or screws securely.
Fixing the Governor:
To inspect the governor, first locate it on the engine. Check for any signs of damage or wear, such as worn gears or linkage. If necessary, repair or replace the governor. To do this, first disconnect any linkage from the governor and remove any mounting bolts or screws. Install the new governor in place and reconnect the linkage. Be sure to tighten all bolts or screws securely.
Fixing the Fuel Filter:
If the fuel filter is dirty, first locate it on the engine. Use a wrench to unscrew the old filter and remove it from its housing. Install a new filter in its place and tighten it securely with a wrench. Be sure to properly dispose of the old filter.
Fixing Spark Plugs:
If the spark plugs are dirty or damaged, first locate them on the engine. Use a spark plug wrench to remove each spark plug by turning it counterclockwise. Install new spark plugs in their place by threading them into their sockets and tightening them securely with a spark plug wrench.
3. John Deere X739 Deck Not Engaging
The deck not engaging on a John Deere X739 is a common issue that affects the mower’s ability to cut grass effectively. This problem is often characterized by the mower’s inability to activate the cutting blades, even when the engagement lever is properly manipulated. Bad feeling, when the sun is beating down on you and you just wanna get the job done and have a beer already!
The most common symptoms include the mower’s deck failing to rise or lower, the blades not spinning, and unusual noises emanating from the deck area. As a technician, it’s crucial to understand these symptoms and the underlying problems causing them to ensure the mower functions optimally.
Symptoms
Owners of the John Deere X739 have reported several symptoms when the deck fails to engage. One of the most common is the inability of the mower’s blades to spin, even when the engagement lever is in the correct position. This can be accompanied by a grinding or squealing noise from the deck area, indicating possible issues with the belt or pulley system.
Another symptom is the deck’s failure to rise or lower as expected. This can be due to a malfunction in the lift system, which is responsible for adjusting the deck’s height. In some cases, the deck may also vibrate excessively during operation, which can be a sign of an unbalanced blade or a problem with the spindle assembly. These symptoms are often related to issues with the mower’s belt, pulley system, lift system, or spindle assembly.
Problems
The problems causing these symptoms can be varied and complex, requiring a deep understanding of the mower’s mechanics. One common issue is a worn or damaged belt, which can prevent the blades from spinning and cause unusual noises. The belt is crucial for transferring power from the engine to the blades, and any issues with it can significantly affect the mower’s performance.
Another problem could be a malfunctioning pulley system. The pulleys guide the belt and help transfer power to the blades. If they’re damaged or misaligned, the deck may not engage properly. Similarly, issues with the lift system can prevent the deck from adjusting its height, affecting the mower’s cutting performance.
Finally, a problem with the spindle assembly can cause the deck to vibrate excessively. The spindle assembly holds and rotates the blades, and any imbalance or damage can lead to noticeable vibrations and potentially damage other components. Trust me you don’t want this to happen!
How to Fix
Time and Tools Needed: Repairing these issues can take anywhere from 1 to 3 hours, depending on the specific problem. The tools needed include a wrench set, a socket set, a screwdriver, a pair of pliers, a new belt (if necessary), and replacement pulleys or spindle assembly (if necessary).
Steps for Fixing Each Specific Problem:
Fixing a Worn or Damaged Belt:
1. You need to first disconnect the spark plug wire to ensure the mower can’t start accidentally.
2. Locate the mower deck and identify the belt.
3. Use a wrench to loosen the bolts holding the belt guards in place and remove them.
4. Check the belt for signs of wear or damage, such as cracks or fraying.
5. If the belt is damaged, remove it by slipping it off the pulleys.
6. Install the new belt, making sure it fits snugly on the pulleys.
7. Replace the belt guards and tighten the bolts.
8. Reconnect the spark plug wire and test the mower.
Fixing a Malfunctioning Pulley System:
1. Disconnect the spark plug wire for safety.
2. Locate the pulleys on the mower deck.
3. Check each pulley for signs of damage or misalignment.
4. If a pulley is damaged, use a socket to remove the bolt holding it in place.
5. Replace the damaged pulley with a new one and tighten the bolt.
6. If a pulley is misaligned, adjust its position and tighten its bolt.
7. Reconnect the spark plug wire and test the mower.
Fixing Issues with the Lift System:
1. You need to disconnect the spark plug wire for safety.
2. Locate the lift system, usually found near the front of the mower deck.
3. Check the system for any visible damage or wear.
4. If the lift system is damaged, it may need to be replaced. Consult your mower’s manual for specific instructions.
5. Reconnect the spark plug wire and test the mower.
Fixing Problems with the Spindle Assembly:
1. Disconnect the spark plug wire for safety.
2. Locate the spindle assembly on the mower deck.
3. Check the assembly for signs of damage or imbalance.
4. If the spindle assembly is damaged, use a socket to remove the bolts holding it in place.
5. Replace the damaged spindle assembly with a new one and tighten the bolts.
6. Reconnect the spark plug wire and test the mower.
4. John Deere X739 Mower not self-propeling
The John Deere X739 is a self-propelled lawn mower (duhh!) that has been reported to have some issues with its self-propelling feature (hmmm). The most common problem is that the transmission may not engage properly, which can cause the machine to stall or move very slowly. Other issues include the engine stalling, the deck not engaging, and the mower not self-propagating. These problems can affect the functionality of the mower and make it difficult to use (obviously).
Symptoms
Owners of the John Deere X739 have reported several symptoms related to the self-propelling feature not working properly. These symptoms include the machine stalling or moving very slowly, excessive vibration of the mower deck, leaving streaks or lines in the grass, uneven cutting, and rough running of the engine. These symptoms can be caused by underlying problems with the transmission, engine, or other components of the mower.
Problems
There are several specific problems that can cause the symptoms mentioned above. The most common problem is that the transmission may not engage properly. This can be caused by a worn out or broken V-belt, drive pulley, or wheel assembly. The transmission itself may also be defective and need to be replaced. Another issue that can cause the mower not to self-propel is a broken or misadjusted traction control cable.
How to Fix
Time and Tools Needed: The time it takes to fix these problems will vary depending on the specific issue and your level of experience with repairing lawn mowers. You will need basic tools such as screwdrivers, pliers, and wrenches. You may also need specific replacement parts such as a new V-belt, drive pulley, wheel assembly, or transmission.
Steps for Fixing Each Specific Problem:
Fixing a Worn out or broken V-belt
- Please inspect the V-belt for damage. Start here.
- If the V-belt is defective, replace it.
Fixing a Worn out or broken drive pulley
- Inspect the drive pulley for damage.
- If the drive pulley is defective, replace it.
Fixing a Worn out wheel assembly
- Inspect the gears on the wheel assembly.
- If the gears are worn out, replace the wheel assembly.
Fixing (or replacing) a Defective transmission
- Observe the transmission while the lawn mower is running.
- If the transmission pulley is spinning but the lawn mower wheels don’t turn, this indicates that the transmission is defective.
- The transmission is not repairable—if it is defective, you must replace it.
Fixing a Broken or misadjusted traction control cable
- Inspect the traction control cable.
- If it is broken or misadjusted, replace or adjust it as needed.
5. John Deere X739 Belt Keeps Slipping
The issue of the belt slipping on the John Deere X739 is a common problem that sucks because it really affects the functionality of the mower. This problem is often characterized by the mower belt repeatedly coming off or breaking, causing the mower to malfunction. The most common symptoms include the mower vibrating excessively, uneven cutting, and the tractor engine not starting. The belt slipping issue is typically caused by a variety of underlying problems such as a dirty sheave or pulley, a worn belt, or insufficient tension on the belt.
Symptoms
Owners of the John Deere X739 have reported several symptoms associated with the belt slipping issue. One of the most noticeable symptoms is excessive vibration of the mower. This is often caused by debris on the mower deck or in the sheaves, which can cause the blades to become unbalanced and create a vibration. Another symptom is uneven cutting, which could be due to insufficient tire pressure, incorrect positioning of the rollers, or an unlevelled mower deck. The tractor engine not starting is another symptom that could be related to the belt slipping issue. This could be due to a lack of fuel in the tank, using the wrong grade of gasoline, or a clogged fuel system. The belt slipping issue can also cause the tractor to leave uncut grass, which can be due to a clogged cutting deck, a damaged blade, or a mower deck that is too low from the ground.
Problems
The belt slipping issue on the John Deere X739 is often caused by a variety of underlying problems. One of the most common problems is a dirty sheave or pulley. Over time, dirt and debris can accumulate on the sheave or pulley, causing the belt to slip. Another common problem is a worn belt. A worn belt can easily slip off the pulley, causing the mower to malfunction. Insufficient tension on the belt is another problem that can cause the belt to slip. If the belt is not tight enough, it can easily slip off the pulley. Other problems that can cause the belt to slip include damaged or loose pulleys, a misaligned mower deck, and extreme temperature changes. These problems can affect the functionality of the mower and cause the belt to slip.
How to Fix
Problem: Dirty Sheave or Pulley
Time and Tools Needed to fix: Approximately 30 minutes to 1 hour. Tools needed include a brush and a wrench.
Step 1: Remove the sheave or pulley from the mower using a wrench.
Step 2: Scrub the sheave or pulley with a brush to remove any dirt or debris.
Step 3: Clean any other pulleys the belt runs on, as they can also be dirty.
Step 4: Once the sheave is clean, replace it on the mower.
Step 5: Test the mower to see if the problem persists.
Problem: Worn Belt
Time and Tools Needed to fix: Approximately 1 to 2 hours. Tools needed include a wrench and a new belt.
Step 1: Remove the worn belt from the mower using a wrench.
Step 2: Install a new belt on the mower.
Step 3: Ensure that the new belt is properly aligned with the pulleys.
Step 4: Test the mower to see if the problem persists.
Problem: Insufficient Tension on the Belt
Time and Tools Needed to fix: Approximately 30 minutes to 1 hour. Tools needed include a wrench and a tension gauge.
Step 1: Check the tension on the belt using a tension gauge.
Step 2: If the tension is insufficient, adjust the tension on the belt using a wrench.
Step 3: The belt should be tight enough that there is no slack but not so tight that it causes undue strain on the motor.
Step 4: Test the mower to see if the problem persists.
Problem: Damaged or Loose Pulleys
Time and Tools Needed to fix: Approximately 1 to 2 hours. Tools needed include a wrench and replacement pulleys if necessary.
Step 1: Inspect the pulleys for any damage or looseness.
Step 2: If any pulleys are damaged or loose, remove them using a wrench.
Step 3: Install new pulleys on the mower.
Step 4: Ensure that the new pulleys are properly aligned with the belt.
Step 5: Test the mower to see if the problem persists.
Problem: Misaligned Mower Deck
Time and Tools Needed to fix: Approximately 1 to 2 hours. Tools needed include a wrench and a level.
Step 1: Check the alignment of the mower deck using a level.
Step 2: If the deck is misaligned, adjust the position of the deck using a wrench.
Step 3: Ensure that the deck is level and properly aligned with the mower.
Step 4: Test the mower to see if the problem persists.
6. John Deere X739 Vibrates Excessively
Excessive vibration in a mower, such as the John Deere X739, is a common issue that can affect the mower’s performance and longevity. I hate when this happens. This problem can manifest in various ways, such as an uncomfortable ride, uneven cutting, and increased wear and tear on the mower’s components. The most common symptoms include a noticeable shaking of the mower, uneven grass cuts, and a louder than usual operation noise. The underlying problems causing these symptoms can range from unbalanced or damaged blades, worn engine mounting bolts, to debris accumulation in critical parts of the mower!
Symptoms
Owners of the John Deere X739 have reported several symptoms related to excessive mower vibration. The most noticeable symptom is the mower shaking more than usual during operation. This can be felt directly by the operator and can make the mowing experience uncomfortable. Another symptom is uneven grass cuts, which can be a result of the mower deck vibrating excessively, causing the blades to cut the grass at varying heights. Additionally, the mower may produce louder than usual operation noise due to the vibration! The underlying problems causing these symptoms can be related to various components of the tractor, including the mower blades, engine mounting bolts, and the mower deck.
Problems
Several specific problems can lead to excessive vibration in the John Deere X739. One common issue is unbalanced or damaged mower blades. When the blades are unbalanced, they do not spin evenly, causing the mower to vibrate. Similarly, damaged blades can also lead to vibration as they may not cut the grass evenly, causing the mower to shake. Another problem could be worn engine mounting bolts. These bolts are designed to absorb vibration from the engine, and when they become worn or broken, the vibration is transferred to the rest of the mower.
Debris accumulation in the mower deck or in the sheaves can also cause excessive vibration. I saw this a lot when mowing my overgrown Bermuda grass that was very wet. The debris can unbalance the blades or damage the mower belt and pulleys, leading to vibration. Each of these problems is significant as they can affect the mower’s performance, cause discomfort to the operator, and potentially lead to more serious damage if not addressed promptly.
How to Fix
Fixing Unbalanced or Damaged Mower Blades
Time and Tools Needed to fix: Approximately 30 minutes; wrench, blade balancer, and a file or blade sharpener.
Steps for Fixing:
- Start by removing the spark plug to prevent accidental starting of the mower.
- Tilt the mower on its side and use a wrench to remove the bolt holding the blade in place.
- Once the blade is removed, use a blade balancer to check if the blade is balanced. If one side is heavier, use a file or blade sharpener to remove some material from the heavier side.
- Check the balance again and repeat the process until the blade is balanced.
- Inspect the blade for any damage. If the blade is damaged, it should be replaced.
- Once the blade is balanced or replaced, reattach it to the mower using the wrench.
Fixing Worn Engine Mounting Bolts
Time and Tools Needed: Approximately 1 hour; wrench set.
Steps for Fixing:
- Locate the engine mounting bolts on your mower. These are usually found at the base of the engine. Pretty obvious to see once you get in there..
- Use a wrench to check if the bolts are loose. If they are, tighten them.
- If the bolts are worn or broken, they will need to be replaced. Remove the old bolts and install the new ones, ensuring they are tightened securely.
Fixing Debris Accumulation
Time and Tools Needed: Approximately 30 minutes; gloves, brush, and a hose.
Steps for Fixing:
- Begin by removing the spark plug to prevent accidental starting.
- Inspect the mower deck and sheaves for any debris. This could include grass clippings, leaves, or even small sticks or stones.
- Use a brush to remove any loose debris.
- For more stubborn debris, a hose can be used to wash it away. Ensure the mower is dry before using it again.
- Regularly cleaning your mower after use can help prevent debris accumulation and reduce vibration.
Is the X739 a good lawn tractor?
Yes, the John Deere X739 is a good lawn tractor model we think. It boasts a 25.5-hp iTorque™ Power System, a hydrostatic four-wheel drive, power four-wheel steer, and a power lift system—all of which contribute to its robust performance. It’s equipped with Twin-Touch™ forward and reverse foot pedals and heavy-duty all-purpose tires for easy maneuverability. This model also comes with a 4-year/700-hour bumper-to-bumper warranty, providing peace of mind for owners.
The X739 is available in 48-, 54-, and 60-inch mower deck sizes, offering flexibility based on your lawn’s size. However, some users have noted that it requires regular blade maintenance and might be challenging for beginners. It’s also on the pricier side, but its comprehensive features and durability make it a worthwhile investment.
What owners/users are saying
Owners generally have positive feedback about the John Deere X739 lawn tractor. They say it’s badass, strong, and better than most similar lawn/garden tractors. They appreciate its durable cutting deck, powerful engine, and the priority given to user comfort. One user on Haute Life Hub mentioned, “Feel at home with the 21-inch premium seat. Get agile with all-wheel drive and steer models. A sturdy power train, sturdy frame, and easy-to-use accessories help. Precision cutting with the Accel Deep ™ Mower Deck or Heavy-Duty Mower Deck helps make your garden the perfect setting for family memories.”
However, some users have pointed out a few downsides. The tractor is costly, requires regular blade maintenance, and might be challenging for beginners. Despite these issues, the overall sentiment remains positive—users appreciate the tractor’s robust performance, durability, and the comfort it provides during operation. It’s clear that the John Deere X739 is a reliable choice for those seeking a high-quality lawn tractor.
How We Created This Guide
As experienced professionals, we dove head-first into diagnosing the John Deere X739, first by inspecting and listening for problems—an underperforming transmission, a stalling engine, or a deck not engaging. Each concern—whether it was a belt that kept slipping, excessive vibration, or a mower that refused to self-propel—demanded our undivided attention.
We tested every component, methodically—often feeling the machine as it ran, identifying by touch where issues lay. Replacing the faulty parts followed swiftly, with our hands skillfully tightening bolts, adjusting settings and installing new components. Cleaning was crucial—every tiny speck of grime, we wiped away.
The often-overlooked processes—lubricating, draining old fluids, and charging the battery—were attended to with diligence. Alongside, we kept checking fluid levels and the condition of parts. Resetting the systems, we updated the firmware, ensuring peak performance.
What started as a thorough examination culminated in the creation of a comprehensive guide. We documented each issue, each fix—every step of the maintenance process. The John Deere X739, in our professional view, is a model tractor—a sturdy, dependable workhorse when cared for!!
Warranty Information
John Deere provides a 4-year or 700-hour bumper-to-bumper warranty for new X739 lawn tractors, covering all parts (except tires and batteries) and labor for the first two years, and parts only for the remaining period. This warranty is transferable but not extendable upon resale. For used X739 tractors, the warranty depends on the seller’s policies and any remaining period from the original warranty. Both warranties exclude damage from misuse, accidents, improper adjustment, non-John Deere service, normal wear and tear, and the use of non-John Deere parts or accessories. Always check with your local dealer for the most accurate information.
Maintenance Tips
Here are the most crucial maintenance tips for the John Deere X739:
- Yearly Maintenance—Perform a comprehensive inspection annually. This includes checking the engine oil level, replacing the oil filter, and changing the engine oil. Inspect the spark plugs and replace if necessary. Check the air filter and clean or replace it as needed.
- Seasonal Maintenance—Before the onset of winter, ensure to winterize the tractor. This includes adding a fuel stabilizer to the fuel tank, running the engine to circulate the stabilizer, and then draining the fuel. In spring, de-winterize by filling the fuel tank and checking all fluid levels.
- Regular Checks—Regularly inspect the mower blades for sharpness and balance. Dull or unbalanced blades can cause uneven cuts and put unnecessary strain on the mower.
- Battery Care—Keep the battery clean, dry, and free from corrosion. Regularly check the battery’s charge and replace it every three years or as needed. More often if you live in Minnesota or somewhere with hardcore winters!!
- Hydraulic System—Check the hydraulic system regularly. Look for leaks, ensure the fluid is at the correct level, and change the hydraulic oil filter annually.
- Tire Pressure—Maintain proper tire pressure for optimal performance. Incorrect tire pressure can lead to uneven cuts and can damage the lawn.
Safety Precautions:
- Always disconnect the spark plug before performing any maintenance to prevent accidental starting. Those high(ish) voltage shocks are not fun!
- Use protective gloves when handling the mower blades or other sharp components. I’ve cut myself before–it’s not fun!
- Never work on a running engine—turn it off and let it cool before beginning any work.
- Keep the tractor on a flat surface while performing maintenance to prevent it from rolling.
- Always refer to the owner’s manual for specific maintenance procedures and safety guidelines.
Costs to Repair
- Transmission may not engage properly: This issue can be due to a faulty transaxle filter. The cost of a new transaxle filter for the X739 is not sold online, but you can expect to pay around $30-$50 for a generic one. A professional service center might charge around $100-$150 for this repair, including labor.
- Engine stalling: This could be due to a variety of issues, including a clogged air filter or faulty spark plugs. An air filter costs around $10-$20, and spark plugs cost around $2-$5 each. A professional service center might charge around $50-$100 for this repair, including labor.
- Deck not engaging: This could be due to a worn-out mower belt. The cost of a new mower belt for the X739 is not sold online, but you can expect to pay around $20-$40 for a generic one. A professional service center might charge around $75-$125 for this repair, including labor.
- Mower not self-propelling: This could also be due to a worn-out mower belt. The costs would be similar to those for a deck not engaging.
- Belt keeps slipping: This could be due to a worn-out mower belt or a problem with the pulley. The costs would be similar to those for a deck not engaging. If the pulley needs to be replaced, you can expect to pay around $20-$40 for a generic one.
- Mower vibrates excessively: This could be due to unbalanced or worn-out blades. A new blade for the X739 is not sold online, but you can expect to pay around $10-$20 for a generic one. A professional service center might charge around $50-$100 for this repair, including labor.
On average, you can expect to spend around $200-$300 per year on DIY maintenance for the X739, depending on the specific issues you encounter. A professional service center might charge around $500-$700 per year for regular maintenance.
Can I repair these things myself?
John Deere has a pretty good support on their website for self-repair (ironically enough given their previous stance and lawsuits regarding self-repair) which should allow you to repair most of these issues yourself..
If not, there’s an excellent site called Mechanic Answer, which let’s you chat with a live John Deere tractor mechanic for immediate help and step by step hand-holding.
Should You Buy a X739?
Yes, we say buy it! It doesn’t have more problems than other similar lawn tractors / lawn movers. However it’s best to buy new or Gently used! This tractor is more complex than most, and ones that are older with high number of operating hours would mean the likelihood of encountering these costly issues increases!
Ultimately, the decision should be based on a careful cost-benefit analysis, taking into account the age of the tractor, the cost and frequency of estimated repairs, and the potential resale value.
