Husqvarna Hydrostatic Transmission Oil Type, Capacity & Filter


Husqvarna Hydrostatic Transmission Oil Type: The maintenance of the condition of your Husqvarna zero-turn lawn tractor is vital for the long-lasting performance of your machine. 

The most important aspect of maintaining is regular oil replacements of the transmission’s hydrostatic. 


Selecting the right type of oil understanding its capacity and knowing when you need to change your filter is essential to ensure optimal transmission performance and avoid expensive repairs.

This guide will give you current information, sourced from the official Husqvarna documents, about what is the recommended oil capacity, type, and filtering specifications for your particular Husqvarna version.


Husqvarna Hydrostatic Transmission Oil Type

Husqvarna Hydrostatic Transmission Oil Capacity

The maintenance of your Husqvarna lawn tractor, and zero-turn mower is crucial to ensure its long-term durability and maximum performance. 

One of the most important aspects of this maintenance is to ensure that the oil level is correct within the hydraulic transmission.

This guide will assist you in determining the proper hydrostatic transmission oil capability for your particular Husqvarna model

Husqvarna Hydrostatic Transmission Oil Capacity

Model SeriesCapacity of Oil (US Quarts)
EZ, MZ, and earlier ZTH Commercial Zero Turn MowersSee the owner’s guide
iZ, LZ, BZ Zero Turn MowersCheck the owner’s manual
YTH Garden Tractors (most models)2.0 quarts
YTH Garden Tractors (select models)2.3 quarts
ZTH Garden TractorsCheck the owner’s manual

Husqvarna Hydrostatic Transmission Oil Type

The efficiency and durability that you get from the Husqvarna lawn mower or zero turn are dependent in large part on the use of the right oil for your hydrostatic transmission. The wrong choice of oil could result in a decrease in performance wear and tear, premature wear and expensive repairs.

Here’s a helpful guide to assist you in navigating the different oils that are recommended for different Husqvarna models:

Table: Husqvarna Hydrostatic Transmission Oil Type

Model SeriesRecommended Oil Type
EZ, MZ, and earlier ZTH Commercial Zero Turn Mowers20w-50 non-synthetic motor oil
iZ, LZ, BZ Zero Turn Mowers15w-50 engine oils made of synthetic
YTH Garden Tractors (most models)Tuff Torq TDTO-1000 fluid
YTH Garden Tractors (select models)Tuff Torq TDTO-1100 fluid
ZTH Garden Tractors15w-50 engine oils made of synthetic
AWD RidersAWD Transmission Oil (10w-30)

Husqvarna Hydrostatic Transmission Oil Change 

  1. Find the drain plug as well as the fill plug to Hydrostatic Transmission. These are typically found either on the bottom or sides of the housing housing.
  2. The drain pipe should be placed under the plug for draining.
  3. Unlock the drain plug by using a wrench or socket. Allow the oil to drain completely from the pan.
  4. After the oil is gone and the drain plug is cleaned, and then replace the drain plug. Tighten it securely using a socket or wrench.
  5. Find your oil filter (if needed) and take it off. Responsibly dispose of the used filter.
  6. Cleanse the filter mount surface.
  7. Make a layer of oil that is new to that gasket on the filter.
  8. Install the new filter by hand.
  9. The funnel should be placed in the hole for filling.
  10. Add the new oil slowly into the transmission. Refer to your owner’s manual for specific capacity.
  11. The oil level should be checked often as you add more oil. Use the dipstick supplied, if it is available or follow the directions in the owner’s manual to assist you in making sure the oil level is maintained.
  12. When the oil level is at the complete mark Stop the addition of oil.
  13. Take the funnel off and replace it with a fill plug. Tighten it securely using a socket or wrench.
  14. Get the car started, and then check to see if there is any leak near the drain as well as filter.
  15. Get rid of the old oil safely by contacting an authorized collection facility.

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Motor oil will work in hydrostatic mowers. Hydrostatic transmission oil is anti-foaming and anti-oxidizing.

This chemical improves performance and extends transmission life. Recommend AMSOIL20W-50 Zero-Turn Synthetic Hydrostatic Transmission Fluid.

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FAQs – husqvarna hydrostatic transmission oil type

Which oil goes into the hydrostatic transmission?

What type of oil is used in hydrostatic transmission? Transmissions on consumer zero-turn mowers and tractors are maintenance-free and do not require frequent fluid replacement unless specified in the owner’s handbook. The Swedish Riders 16 (H), Rider 155, and Rider 175 utilize non-synthetic 10w-30 motor oil.

How to fix Husqvarna hydrostatic transmission problems?

You might check the operator manual of your Husqvarna hydrostatic transmission to overcome the viscosity problems. Shifting problems will also occur when the control arm is out of adjustment. When the lawn tractor starts moving automatically, you first check the oil issues.

What type of engine oil does my Husqvarna rider use?

Swedish Riders 16 (H), RIder 155, and Rider 175 use 10w-30 non-synthetic engine oil. Rider 175 AWD and Rider 155 AWD use 10w-40 non-synthetic engine oil.

Fluid change for the Swedish Riders needs to be performed by an authorized Husqvarna Service dealer due to the complexities of the drive system.

What kind of hydraulic fluid does a Husqvarna zero-turn use?

For a Husqvarna zero-turn mower, what kind of hydraulic fluid should I use? A zero-turn Husqvarna mower uses what kind of hydraulic fluid? Commercial zero-turn mowers with an EZ, MZ or older ZTH engine require 20w-50 non-synthetic engine oil.