New Holland TN70 Problems And How To Fix Them

The New Holland TN70 is a unique utility tractor from the popular manufacturer and it has been around for many years due to its durability and reliability, unfortunately its age is also where most of its problems originate from and today we will be taking a look at what some of those problems are and how to effectively troubleshoot them.

Table of Contents

What Is The New Holland TN70?

The New Holland TN70 was first released in 2003, with a power take-off (PTO) of 50 hp and 6300 rpm this 26×12×12 tire utility tractor  can also accommodate up to three 3-point hitch implements and make quick work of any farming job. If you’re looking for something bigger, they even offer up to other models with over 70HP. The New Holland TN70 offers a hard-working engine that runs on gasoline or diesel and both versions have 8 forward and 8 reverse gears. This means you can haul heavy loads without slowing down your productivity.

New Holland TN70 Problems

1. Glow Plug Issues

One of the most common problems with the New Holland TN70 is ignition and glow plug issues. This can lead to difficulty starting the utility tractor  and further complications once it is running. This unfortunately causes problems like;

  • A malfunctioning electrical system
  • A damaged or faulty spark plug
  • A dead battery

Troubleshooting Glow Plug Issues

  • You’ll first need to check the wiring that supplies power to the plugs. If it is malfunctioning, or not making contact, then this could be causing of the issue. Secondly make sure that both your glow plug fuse and ignition switch are functioning properly.
  • If both these elements are working correctly, then your spark plugs may need replacing.
  • Finally if all else fails then you need to make sure that your battery is fully charged and in good condition.

2. Fuel System Failure

Fuel system failure is another issue with the New Holland TN70 utility tractor and it can be an expensive fix. Failure to the fuel system can mean;

  • A damaged fuel line or hose
  • Low fuel in fuel tank
  • Damaged seals or gaskets

Troubleshooting Fuel System Failure

  • First you need to be sure to check all the hoses and tubing for signs of wear, cracking or bulging. Inspect for clogged filters and replace if needed.
  • Also be sure to check for any air leaks in the fuel system as these can affect engine performance and lead to further problems.
  • Make sure your fuel tank is relatively free of debris and debris buildup in the bottom of your tank.
  • Keep an eye on your gage while filling so you know when you’ve reached capacity without overfilling it because it can cause damage to the seals and gaskets.

3. Transmission And Hydraulic Issues

One of the most common issues with the New Holland TN70 is transmission and hydraulic problems. These problems include;

  • Gear slipping
  • Fluid leakage

Troubleshooting Transmission And Hydraulic Issues

  • Be sure to check that none of the gears of your utility tractor are damaged or worn, and take the necessary steps if they happen to be so.
  • If you find any leaks make sure to take care of them as soon as possible to prevent further damage.
  • If these levels are off it could be causing your transmission and hydraulic issues so make sure they match the specifications in your New Holland TN70 owner’s manual.

4. Front Axle Failure

When it comes to the New Holland TN70 utility tractor, front axle and steering problems are fairly common. This is due to the fact that the front axle bears most of the load the utility tractor  carries. These problems include;

  • Fluid leakage
  • A faulty steering system
  • Dirt or grease

Troubleshooting Front Axle Failure

  • Check for any leaks in the hoses, connections or pumps. If there are any signs of wear and tear then replace them immediately.
  • Check all of the parts related to the steering system including linkages, bushings, pins, knuckle assemblies, wheel bearings and spindles. If any of these parts are worn or damaged they may need to be replaced.
  • Make sure to clean out all of the areas where dirt has collected with a wire brush or compressed air. Then apply a lubricant to ensure all parts move freely.

5. Cooling System Problems

The New Holland TN70 is a powerful yet compact utility tractor designed to tackle a wide range of farming tasks. Unfortunately, this utility tractor is prone to cooling system problems and they arise from;

  • Damage to the radiator
  • A clogged radiator
  • A damaged water pump
  • A faulty thermostat

Troubleshooting Cooling System Problems

  • Check for airlocks in the radiator or coolant hoses.
  • Replace the radiator cap if it is not functioning properly.
  • Flush the cooling system and replace old coolant with fresh anti-freeze.
  • Inspect the water pump for signs of wear or damage and repair or replace as necessary.
  • Change the thermostat which might be stuck in a closed position causing over-heating issues.

How To Prevent Problems With The New Holland TN70

  • One of the most important things you can do is ensure regular maintenance on your utility tractor. This means following the manufacturer’s suggested schedule for oil, filter and coolant changes as well as checking all of the components for wear and tear, rust or corrosion.
  • Use a fuel that is too low grade could lead to engine damage or performance issues.
  • Avoid storing the New Holland TN70 in wet or humid conditions to prevent rust or corrosion and make sure to follow the manufacturer’s directions for cleaning and greasing when putting it away for long periods of time.
  • Also avoid overloading or handling the machine improperly as this can cause mechanical damage.

What Maintenance Should Be Conducted on The New Holland TN70?

If you want to keep your New Holland TN70 well maintenance then you need to start by; checking hydraulic fluids and/or coolant levels then lubricating any moving parts such as the drive shafts or axles and then inspecting and cleaning the air filter and other filters for debris buildup and lastly checking the rod bearings for wear and tear.

What Issues Should A [New Holland TN70] Owner Look Out For?

Owners of the New Holland TN70 should look out for any strange noises or vibrations when operating the utility tractor. These could be signs of a broken bearing or other mechanical issue. You also need to keep an eye on the temperature gage. If it rises beyond normal levels then this could indicate a problem with the cooling system.


Understanding and troubleshooting the most common problems with the New Holland TN70 can be a major time-saver on your part (as the owner.) From issues with glow plugs to malfunctioning transmission, these issues can create significant challenges for the utility tractor’s owners. Fortunately each can be diagnosed and addressed through a combination of visual inspection and well-informed replacement of parts. When it comes to New Holland TN70 utility tractor’s problems don’t let them leave you in the dust.