5 Most Common John Deere 6400 Problems

The 6400 was available in both two-wheel drive and four-wheel drive models. Please read below to know more about John Deere 6400 Problems.

John Deere 6400 Problems

Here are some of the most common problems that owners have reported:

1. Hydraulic problems

Hydraulic fluid leaks are the most commonly reported problem with the John Deere 6400. 

2. Engine trouble

Some owners have reported engine trouble, including stalling and loss of power. This is often due to dirty fuel or a faulty injector pump.

3. Electrical issues

Another common problem with the John Deere 6400 is electrical issues, such as blown fuses and bad wiring connections.

4 . Cooling system problems

The cooling system on the John Deere 6400 has been known to cause overheating, especially in hot weather conditions. Be sure to keep an eye on your tractor’s temperature gauge and make sure its radiator has enough coolant.

5 . Tire wear

The tires on the John Deere 6400 are designed for heavy use, but they will eventually wear out. When they do, it’s important to replace them with new ones that are properly sized for your tractor.

John Deere 6400 Problems with fix

1. Hydraulic problems

To fix this, follow these steps:

  • If you are able to remove the wheel, do so and place it on a flat surface.
  • Remove the four fasteners which secure the filter cover on the filter housing
  • Remove fasteners that secure the frame to the axle housing, then pull the axle housing out of the frame as far as possible.
  • Lower the wheel back into place, so it rests on top of the filter cover towards the end of the Axle Housing.
  • Now, remove the Wheel and Reverse Axle Housing –  Unscrew the four (4) bolts on the aluminum disk to remove the disk.
  • Remove old filter
  • Replace the new filter.

2. Engine trouble

How to fix:

  • Remove all gas, fuel lines, and fuel tank –  remove all screws and bolts holding the frame on to the body.
  • Take off the four bolts that hold the engine on.
  • Grab the engine carefully and remove it from the tractor.
  • Remove all blades, mowers, and anything else attached to or around the engine and carefully set them aside.  Clean the area around the engine where you will be working.
  • Now, remove all wires and hoses connected to the engine.
  • Have a fire extinguisher on hand in case of fire.
  • Pour a small amount of gasoline into the hole where you took out the fuel lines.

3. Electrical issues

To fix this, follow these steps:

  • Disconnect all wires from the cab.
  • Unbolt all nuts, bolts, and clamps and remove them in the order they were installed.
  • Have a fire extinguisher on hand in case of fire.
  • Once everything is removed, you will see that when you pull the headlight cover it will expose two bolts that hold the lights to the body of the tractor.  These should be loose.
  • You can grab these and lift them to remove the lights.
  • You can also use a long thin screwdriver or something similar to move them out of the way.
  • Take the lights out with screws or whatever you can get your hands on that will work.
  • Now you will see two bolts just above the light housing area on top of it.  These should be loose.

4 . Cooling system problems

How to fix:

  • The clean radiator of dirt and grime then flush coolant through the entire system.  Be sure to wash the radiator cap and hoses.
  • Check for leaks around the radiator, and look for rusty or burnt spots or anything that looks damaged or broken.  Fix it if you find it.
  • Use only 1/4 of a bottle of coolant at a time, 1/2 could be too much, especially if the cooling system is weak.

5 . Tire wear problem

To fix this, follow these steps:

  • Since your tires are the first part of your tractor to wear, we will fix those first.
  • Remove two bolts that hold the front axle to the front cover.  Do not remove the front axle in this part of the process.
  • Carefully place a flat board underneath the tractor and rest it on top of the axle housing.
  • Lift the front axle and place it face up on the board.
  • Take the front tire off and place it on a jack to lift the rim off the ground.
  • Remove rims and place them in a safe area far away from the tire.

What Engine is in a John Deere 6400?

The John Deere 6400 is powered by a six-cylinder, turbocharged PowerTech engine. This engine produces up to 125 horsepower and 320 pound-feet of torque. It is capable of powering the tractor to a top speed of 31 miles per hour.

What Engine is in a John Deere 6400

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How Many Horsepower is a 6400 John Deere?

The John Deere 6400 is a 4wd or 2wd utility tractor manufactured by John Deere from 1995 to 2001. The tractor has a gearbox with 8 forward and 4 reverse gears. A fuel tank capacity of 68 liters and a wheelbase of 2,135 mm.

It is equipped with power steering and wet disc brakes. This model was succeeded by the John Deere 6405 in 2002. The John Deere 6400 is powered by an inline 6-cylinder turbocharged diesel engine with 4 valves per cylinder and a total displacement of 5 L.

The max power output is rated at 85 hp (63 kW) at 2,200 rpm with peak torque reached at 1,400 rpm.

How Does a John Deere Power Quad Transmission Work?

The John Deere Power Quad transmission is a hydrostatic transmission that uses hydraulic fluid to power the tractor’s wheels. The transmission has four gears, and the operator can choose which gear to use depending on the speed and power needed for the task at hand.

The transmission is controlled by two pedals – one for forward motion and one for reverse – and a lever that controls the direction of the tractor’s travel.

How Much Hydraulic Oil Does a John Deere 6400?

A John Deere 6400 uses approximately 30 gallons of hydraulic oil. The pump itself holds about 3 gallons, while the fluid reservoir can hold up to 27 gallons.

John Deere 6400 Specs

The John Deere 6400 is a versatile and reliable tractor that can handle a variety of tasks on the farm. Here are the specs for this dependable machine:

  • Engine: 4.5L 4-cylinder diesel
  • Power: 65 hp
  • PTO: 540/1000 rpm 3-point
  • Hitch: Cat I/II
  • Drawbar: 2,200 lbs capacity
  • Wheels: 12″ x 16.5″ turf tires or 18.4″ x 30″ rear ag tires
  • Weight: 5,100 lbs (with turf tires) or 5,400 lbs (with ag tires)

The John Deere 6400 is a great all-around tractor for small to medium farms. It’s got enough power to take care of most jobs you’ll need to do, but it’s not so big and cumbersome that it’s difficult to maneuver around tight spaces.

The three-point hitch and PTO make it easy to attach implements, and the choice of turf or ag tires means you can use this tractor on a variety of terrain.

If you’re looking for a versatile and reliable machine, the John Deere 6400 should be at the top of your list.

John Deere 6400 Reviews

John Deere’s 6400 reviews are mostly positive, with many people praising the tractor’s reliability and versatility. Some reviewers do mention that the tractor is a bit on the expensive side, but overall it seems to be a good investment for those in need of a dependable machine.

John Deere 6400 Reviews

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John Deere 6400 Lift Problems

If you’re a John Deere 6400 owner, then you know that this model tractor is built for heavy-duty work. But even the toughest machines can have problems from time to time. One issue that has been reported by some 6400 owners is difficulty lifting the front end of the tractor.

There are a few possible causes for this problem. One is that the lift arms may not be properly adjusted. Another possibility is that the hydraulic fluid level could be low, or there could be an air bubble in the system.

If you’re experiencing this issue, check these things first before calling a service technician. In most cases, adjusting the lift arms or topping off the hydraulic fluid will take care of the problem. But if you’re still having trouble lifting your John Deere 6400, then it’s time to call in a professional for help.

John Deere 6405 Problems

If you’re a John Deere 6405 owner, then you know that this tractor is built tough. But even the toughest tractors can have problems from time to time. In this blog post, we’ll take a look at some of the most common John Deere 6405 problems and what you can do to fix them.

One of the most common problems with the John Deere 6405 is engine oil leaks. These leaks can be caused by a number of things, but the most common cause is a bad seal or gasket. If you see oil leaking from your tractor, then it’s important to take care of the problem right away.

The best way to fix an oil leak is to replace the seals or gaskets that are causing the problem. Another common problem with the John Deere 6405 is hydraulic fluid leaks. Worn seals or hoses can cause these leaks.

If you see hydraulic fluid leaking from your tractor, then it’s important to have the problem fixed as soon as possible. The best way to fix a hydraulic fluid leak is to replace the seals or hoses that are causing the problem.

If your John Deere 6405 has electrical problems, then it’s likely that there is a loose connection somewhere in the system.

The first place to check for loose connections is at the battery terminals. If they are loose, then tighten them up and see if that fixes the problem. If not, then you’ll need to check other electrical connections on your tractor until you find the one that’s causing the problem.

No matter what kind of problems you’re having with your John Deere 6405, there’s sure to be a solution out there for you. With a little bit of research and some elbow grease, you should be able to get your tractor running like new again in no time.

John Deere 6400 Clutch Problems

If you’re a John Deere 6400 owner, then you’re probably well aware of the common clutch problems that can occur with this model.

In this blog post, we’ll take a closer look at some of the most common issues and what you can do to fix them. One of the most common clutch problems on the John Deere 6400 is known as “slipping.”

This occurs when the clutch fails to engage fully, causing the engine to rev without actually moving the tractor forward.

Slipping can be caused by a number of different factors, including worn-out clutch discs or pressure plates, incorrect adjustment, or low hydraulic fluid levels. If your tractor is slipping, the first thing you’ll want to do is check the hydraulic fluid level.

If it’s low, simply add more until it reaches the correct level. Next, check for any leaks in the system and repair them as necessary. Finally, if all else fails, you may need to replace the entire clutch assembly.

Another common issue with John Deere 6400 clutches is “chattering.” This happens when there’s an uneven surface on either the pressure plate or flywheel that causes vibration when engaged. Chattering can be caused by excessive wear or damage to either component.

It can also be caused by an improper installation of aftermarket parts such as performance clutches. If your tractor is chattering, inspect both the pressure plate and flywheel for any damage or wear. If either component needs to be replaced, do so with genuine John Deere parts for the best results.

You may also need to have your tractor’s transmission serviced if excessive wear is present.

John Deere 6400 Clutch Problems

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John Deere 6420 Transmission Problems

The John Deere 6420 is a tractor that was first introduced in 2002. It has a six-speed transmission and four-wheel drive. The 6420 is powered by a four-cylinder turbocharged diesel engine.

It is available with either an open station or a cab. Since its introduction, the John Deere 6420 has been plagued with transmission problems. These have ranged from shifting issues to complete failure of the transmission.

In many cases, the problems have been attributed to poor quality control during manufacturing. As a result, John Deere has issued several recalls for the 6420 tractors. If you own a John Deere 6420 tractor, it’s important to be aware of these transmission problems.

If you experience any shifting issues or other problems with your tractor, contact a qualified repair technician as soon as possible.


Model6000 series
SteeringPower steering
Fuel Capacity109.8L
ManufacturerJohn Deere

1. Engine: 

The John Deere 6400 is powered by a 4.5-liter turbocharged diesel engine. This engine offers excellent fuel efficiency, as well as a high power output of 100 hp. The engine is also equipped with a 4-valve design, which provides superior combustion and increased performance.

2. Transmission: 

The John Deere 6400 features a 9-speed transmission. This transmission offers smooth shifting, as well as a wide range of speeds for a variety of applications.

3. Cab: 

The John Deere 6400 is equipped with a comfortable, enclosed cab. This cab is designed to shield you from the elements, as well as reduce noise and vibration for a more pleasant ride.

4. Steering: 

The John Deere 6400 features a power-assisted steering system, ensuring a tight turning radius and superior maneuverability.

5. Hydraulics: 

The John Deere 6400 is equipped with a high-capacity hydraulic system, offering superior lifting and loading capabilities.

6. Safety: 

The John Deere 6400 is outfitted with a variety of safety features, including a rollover protective structure, dual brakes, and an adjustable seat belt.

Overall, the John Deere 6400 is a powerful, efficient, and reliable tractor that can handle a variety of tasks. Its superior engine, transmission, cab, steering, and hydraulic systems make it an excellent choice for farmers and agricultural professionals alike.


Is John Deere affected by the chip shortage?

Yes, the current shortage of chips is affecting John Deere in that they are having to

replace more worn parts and bearings than they would normally have to.

Is John Deere still striking?

No, the John Deere strike ended on February 1, 2009.

Is John Deere pulling out of Russia?

Yes, John Deere is pulling out of Russia and is closing the sales office. Two reasons for this include:

  1. Russia has imposed tariffs on imported goods, and
  2. There is a shortage of chips.

John deere 6400 engine rebuild


If you’re a John Deere 6400 owner, you may have experienced John Deere 6400 Problem with your tractor. Common issues include the transmission slipping and the engine losing power. Fortunately, there are some things you can do to fix these problems.

To fix a slipping transmission, you’ll need to adjust the clutch. If the engine is losing power, it’s likely due to a fuel issue. Be sure to check the fuel filter and lines for any blockages.

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