5 Most Common New Holland Workmaster 75 Problems (And Effective Fixes)

The New Holland Workmaster 75 utility tractor is a practical workhorse for small- to medium-sized farms. It’s a tough, versatile, and powerful tractor that handles various farm tasks. Despite being one of the best utility tractors, the Workmaster 75 is susceptible to a few issues. The most common New Holland Workmaster 75 problems are engine issues, transmission problems, hydraulic issues, problematic steering, and electrical issues.  

With basic tools and skills, you can fix most of these issues. But what if you don’t know how to resolve them? Read on as we dissect Workmaster 75 issues, their causes, and effective fixes.

Engine Problems

If your Workmaster 75 engine has problems, it may perform poorly or fail to work. The engine might be difficult to start or fail to start. And if it starts, it might shut off suddenly after a while. Engine problems result from a clogged fuel filter, bad spark plugs, or malfunctioned fuel injection pump.

The engine might also overheat while running and cause low power and poor performance. When this happens, the culprits could be a clogged radiator, air filter, or low coolant level.

Effective fixes:

If the engine has starting problems, inspect the spark plugs and the fuel filter. Bad spark plugs might appear worn or have a black carbon buildup. Replace them if they are faulty. Next, check for a clogged fuel filter. Replace it if necessary and clean the fuel system to prevent the problem from reoccurring.

Inspect the fuel pump if these two fixes won’t resolve the engine starting problems. A professional should help you reconstruct or replace a malfunctioning fuel pump.

Does the engine overheat during operations? If so, check for a clogged radiator and air filter. These components usually get clogged with dirt and debris in the farms.

Clean your radiator with tap water and a cleaning solution. If stubborn substances are in the radiator, spray a degreaser to remove them. Next, clean the air filter or replace it.

If the overheating issue persists, check the level of coolant. If it’s low, fill it to the correct level and check for signs of leakage.

Transmission Issues

The transmission system in your New Holland Workmaster 75 transmits engine power to the rear wheels. Problems with the transmission might greatly reduce your tractor’s performance. In most cases, these problems result from the following:

  • Low transmission fluid
  • Damaged transmission hoses
  • Faulty gear shift linkage
  • Worn clutch

Like many New Holland Workmaster 75 problems, transmission issues have distinctive symptoms. For example, the gears might be hard to shift. You may also notice transmission oil leaks and excessive transmission noise.

Effective fixes:

Check the transmission oil level and add more if necessary. Leaks in the system might cause a low transmission oil level. Check for worn seals and gaskets and replace them.

If the gears are hard to shift, inspect the gear shift linkage and replace it if it appears worn or rusty. Next, check the clutch to see if the large gap between the flywheel and the pressure plate causes it to slip. If it’s too large, adjust it correctly.

Excessive noise from the transmission indicates worn gears or low transmission oil. Replace the gears and fill up the oil. You can also check for broken bearings and replace them.

Hydraulic Problems

The hydraulic system allows your Workmaster 75 tractor to operate the steering, brakes, and attachments. If your tractor has hydraulic problems, it might not operate these functions correctly.

Hydraulic issues in New Holland Workmaster 75 tractors occur due to the following:

  • Leaking hydraulic fluid
  • Air in the hydraulic system
  • Faulty hydraulic pump

When these problems occur, you might notice that the 3-point hitch lifts too slowly or won’t lift at all. It might also fail to drop or drop too slowly.

Effective fixes:

Check if the hydraulic fluid level is low. Leaks in the hydraulic system can cause a low transmission fluid level. Inspect the piping and hydraulic hoses for signs of leaks. Replace the leaking pipes and hoses. Then, add hydraulic fluid to the correct level.

If air is in the system, bleed it out by opening the bleed screw. After bleeding the air out, start your tractor and allow the engine to run for 15-20 minutes.

Inspect the fluid filter and hydraulic pump if the tractor hitch has issues lifting the implements. Replace the filter if clogged. If this won’t resolve the problem, the hydraulic pump might be faulty and needs replacing.

Electrical Issues

Some New Holland Workmaster 75 problems might originate from the electrical system. If you experience electrical issues with your tractor, the engine might have starting problems. These problems can also affect your tractor’s ability to run or operate implements.

Workmaster 75 electrical problems might result from the following issues:

  • Low or dead battery
  • Clogged battery terminals
  • Loose connections
  • Faulty starter motor

Some Workmaster 75 owners have reported that electrical issues cause the tractor lights not to work correctly.

Effective fixes:

The first component to inspect is the battery. A voltmeter should help you check for low voltage. Recharge the battery fully if necessary. If your battery won’t charge, check the terminals for corrosion.

If they appear corroded, clean them. To remove the corrosion, use warm water, baking soda, and an old toothbrush. Alternatively, remove the corrosion with a battery terminal cleaner.

Next, inspect the connections. If they’re loose, reconnect them firmly. You can also replace any damaged connections.

If the electrical issue persists, check for a faulty starter motor. A multimeter should help you know if the motor is defective. Replace the motor or take it to a specialist for repair.

Steering Problems

The steering is a critical component in your New Holland Workmaster 75. It allows you to control the tractor in your desired direction. However, the steering in this tractor is prone to issues like free play, hard to turn, and the tractor pulling to the left or right.

If your steering has problems, check for the following:

  • Worn-out steering column shaft
  • Faulty steering pump
  • Loose steering linkage components
  • Defective hydrostatic steering unit
  • Worn front tires

Effective fixes:

Inspect the steering column shaft if your steering wheel has excess free play. Replace it if it appears worn out. Next, check if the steering pump is faulty and change it if necessary.

If the free-play persists, inspect the steering linkage components. If they’re loose, tighten them. If they’re worn, replace them.

Does your steering pull to the left or right? If so, check for a defective hydrostatic unit. Hire a mechanic to repair or replace the steering unit.

If the steering is hard to turn, air might be in the steering system. Bleed out the air in the steering system. You can also replace the steering filter and refill the steering fluid.

Lastly, inspect the condition of the front tires. If they appear worn unevenly, install new, compatible tires and inflate them appropriately.

Final Thoughts

If your tractor has the above problems, you can get it up and running again using our effective fixes. What if you can’t fix some New Holland Workmaster 75 problems? In that case, seek professional help from a reputable dealer or mechanic. 

Alternatively, contact New Holland customer care for advice. Once you’ve fixed any of these problems, maintain your tractor regularly to keep it in top condition.