![]() When it needs to be fixed fast and done right, call an expert! It’s one of those farm equipment essentials you simply can’t do without. Your tractor represents a significant investment in terms of both money and delay. When it’s time to call in an expert, don’t hesitate. Their service department should be able to ask the right questions, give suggestions, and you can make an appointment for service if necessary. If you need help troubleshooting your tractor’s hydraulic system, call your dealer. If there are no signs of fluid leaks or damage, it may be time to change your hydraulic and steering fluids. Sluggish operation is often due to old or overused fluids. Change Your Hydraulic and Steering Fluids Clean pump cooling fins with a rag, brush, or compressed air, and check for damage.ģ.Inspect the hoses and connections for damage or signs of leaks.Check the oil level and add oil if needed.Start with a complete visual check of the hydraulic system. If your system is purged and you still have a problem, it’s time to do a little basic troubleshooting. You’re done! The air is purged from your system and your zero-turn mower is ready for action. Return the levers to neutral and repeat this steps three times. Then slowly reverse about the same distance. Move control levers forward and roll about 5 feet.Remove from jackstands, start the engine, and disengage the brake.Check the oil and top off if necessary.Shut the engine off and set the parking brake. Put the control levers in neutral (N).This purges any air from the hydraulic transmission system. Pull motion control levers to full reverse position and hold for five seconds.Push motion control levers forward all the way and hold for five seconds.Position the motion control levers in neutral (N) and disengage clutch/brake pedal. With the engine running, move throttle control to slow position.Sit in the operators seat and start the engine.Disengage the transmission (check your operators manual to see how this is done).Make sure the oil reservoir is properly filled according to specs.Park the mower on level ground, set the parking brake, and put the rear on jackstands.NOTE: If your mower or tractor has a transmission that must be removed for service, be sure to purge after it is serviced and before you use it. It’s also a good first step if your motor is sluggish or slow. After your mower has been stored for the winter, it’s a good idea to purge the transmission before use. This is pretty common in zero-turn mower transmissions. When the pump is full of air instead of oil, it can’t generate the pressure needed to provide power. Zero turn hydrostatic transmission problems can start with air in the system, a condition known as cavitation. Zero-Turn Mowers: Purge Your Hydraulic Drive System Here are some basic troubleshooting tips to fix your hydrostatic transmission lawn tractor problem fast!ġ. Note that, while temperature affects viscosity, the right oil has enough range to operate in any reasonable weather. Here’s an example from a John Deere manual. In the transmission section of your operator’s manual, you’ll find a section that covers oil viscosity. But the most common issue will be the oil itself. Failure of any mechanical component, a broken hose, or clogged filter will cause tractor hydrostatic transmission problems. Hydrostatic transmissions include mechanical parts such as a differential and a drive axle, plus rubber or metal hoses the liquid is pushed through. Troubleshoot New Holland hydrostatic transmission problems Troubleshoot Kubota hydrostatic transmission problems Troubleshoot John Deere hydrostatic transmission problems Your tractor operator’s manual will have information specific to your make and model, and will offer helpful information about where to find filters and other parts that might require servicing are located on your tractor or lawn equipment. There are many different types of equipment with hydrostatic transmissions, and we can only offer general advice. The first step is to read your Operator’s Manual. With any transmission, things can go wrong. ![]() There’s no need for gears, and changing speed is smooth and efficient. Hydrostatic transmissions found in most modern tractors and zero-turn mowers, work by transferring power from the engine to hydraulic pumps which use liquid pressure to move the wheels. Combustion engines, like those found in most cars, transfer power to the vehicle’s axle, which turns the wheels.
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