How to Change Hydraulic Fluid in Zero Turn Mower [Step-By-Step]

By | March 26, 2023

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If you own a zero turn mower, it’s important to know how to change hydraulic fluid in zero turn mower.

The hydraulic system is what allows the mower to move in a turning motion, so if the fluid isn’t changed regularly, it can cause problems with the performance of your mower.

Most manufacturers recommend that you change the hydraulic fluid every 100 hours of use or once a year, whichever comes first.

What Oil type/brand Should You Use?

Hydraulic oil is what makes your zero turn mower move. If you don’t have enough hydraulic oil, your zero turn won’t be able to operate correctly.

Not only that, but the wrong type of oil can actually damage your machine.

So it’s important to make sure you’re using the right kind of hydraulic oil for your model of zero turn mower.

There are a few things to keep in mind when choosing hydraulic fluids for your zero turn mower: -The first is that there are different types of oils available (synthetic, semi-synthetic, mineral).

Synthetic oils are typically more expensive but offer better protection and performance in extreme temperatures.

Semi-synthetic and mineral oils are less expensive but don’t perform as well in extreme conditions.- You’ll also want to consider the brand of oil you buy.

Some brands specialize in certain types of machinery or engine size, so it’s worth doing some research to find an oil that will work well with your particular model.

-Finally, think about whether you want summer or winter grade oil.

Summer grade oils tend to be thinner and provide better cooling properties whereas winter grade oils are thicker and designed for cold weather operation.

Tools Needed To Change Hydraulic Fluid In Zero Turn Mower

It is very important to change the hydraulic fluid in your zero turn mower on a regular basis.

Not only does this ensure that your mower will operate at its best, but it also helps to prolong the life of the machine.

Here are some simple instructions on how to change the hydraulic fluid in your zero turn mower.

Tools Needed:

  • Jack stand 
  • filter cap wrench
  • socket wrench
  • Gloves
  • Oil pan (to catch old oil)    
  • hydraulic Filter    
  • Funnel     
  • New Hydraulic Fluid

Steps To Change Hydraulic Fluid In Zero Turn Mower?

As a general maintenance step, you should regularly check and change the hydraulic fluid in your zero turn mower.

This will help keep your mower running smoothly and prevent any potential issues.

Here are the steps you need to take to properly change the hydraulic fluid in your zero turn mower: 

Before Changing Fluid

Make sure that the mower is turned off and cool. Then, locate the drain plug on the bottom of the oil tank. 

Draining the Fluid and Changing Filter

Place a catch basin underneath the drain plug and remove it to allow the old fluid to drain out completely. Once all of the old fluid has been drained, replace the drain plug. 

Next, locate the filter on the side of the oil tank and remove it (it may be held in place by a retaining ring). Inspectthe filter for any debris or damage and then clean or replace it as needed. 

Adding New Fluid

Once the filter has been replaced, fill up the oil tank with new hydraulic fluid (consult your owner’s manual for guidance on what type/brand of fluid to use). 

Final Checking and Bleeding Air

Finally, reattach the fill cap/plug and start up the mower to bleed any air out of the system (letting it run for a few minutes should suffice).

Check The level of fluid once again after bleeding air from the system to ensure that it is at proper levels before operating your mower as usual.

Why you should trust us

There are a lot of different lawn mowers on the market, and it can be tough to know which one is right for you. 

Senior staff writer Zane Williams has done the homework and spent over 100 hours researching different types of mowers and talking to experts in the field like Justin Watkins of Earth Tones Landscaping

And we’ve put together this guide to help you make an informed decision about which one is right for you.

We only recommend products that we believe in and that we think will deliver value for money. 

We also test each of the mowers ourselves before giving our final verdict – so you can rest assured that they meet our high standards. 

Our goal is to help you find a lawn mower that suits your needs, budget, and lifestyle so that you can enjoy your backyard space worry-free.


It is crucial that I check the fluid level in my mower’s system after bleeding air from it before I operate it as usual.

Neglecting this step could result in damaging my mower’s engine and other vital components.

Therefore, I must make it a routine part of my mower maintenance process to ensure that it operates efficiently and effectively.

By taking the time to perform this simple check, I can avoid potential problems down the road and prolong the lifespan of my mower.

Changing Hydraulic Fluid FAQ’s (Frequently Asked Questions)

How to flush the hydraulic system on a zero turn lawn mower?

If you need to flush the hydraulic system on your zero turn lawn mower, you will need to disconnect the battery and remove the oil fill cap.
Next, locate the drain plug on the bottom of the hydro tank and remove it.
Place a catch basin under the tank and allow all of the fluid to drain out. Once finished, reinstall everything and add new hydraulic fluid until full.

How to adjust the hydraulic travel on a zero turn mower?

There is not a lot of information available on how to adjust the hydraulic travel on a zero turn mower.
However, it is likely that the adjustment screws are located near the front wheels.

What happens if you don’t change hydraulic fluid?

If you don’t change hydraulic fluid, it will eventually become contaminated and may cause the system to fail.

How do you know if your hydraulic oil is bad?

The first sign of bad hydraulic oil is usually cloudy, dark colored oil.
If the problem isn’t addressed, it will eventually lead to clogged filters and dirty screen covers.
The result is lessened efficiency and eventual system failure.

Does hydraulic oil wear out?

Yes, hydraulic oil does wear out with use.
This is due to the fact that it carries away heat and metal particles from moving components in a system.
Over time, these contaminants can cause deposits that lower the effectiveness of your hydraulic system’s performance.