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W061 Cartridge

The W061 filter assembly contains the popular HF3 filter. Quick filter change outs are accomplished with the use of our easily serviceable ring assembly. Donaldson DT high-performance filters are offered in a variety of designs. Five different media grades are offered. The differential pressure indicator line is designed to work with a wide assortment of bypass valves.


  • In-Plant Systems
  • Mobile Equipment


  • Rugged and reliable construction 
  • Featuring our high-performance DT filters with multiple efficiency options – allowing you to achieve the performance you need for most any application


  • Durable cast iron head – steel housing
  • Three housing length options offer design flexibility
  • Three housing length options for design flexibility (Assembly length code 2 conforms to HF3 specifications)
  • Core collapse options range from 150 to 3000 psi
  • Differential pressure indicator line works with a wide assortment of bypass valves (thermal lockout and surge control are incorporated in many of the differential pressure indicators)
  • Wide range of indicator options
  • Viton® seals are used on high-performance DT filters
  • Bleed plug in head
  • Working pressure to: 41.4 bar / 600 psi 
  • Rated static burst to: 103 bar / 1500 psi
  • Fatigue pressure rating: 21 bar / 300 psi
  • Flow range to: 379 lpm / 100 gpm
  • Porting size options:
    • SAE-12 O-ring
    • SAE-16 O-ring
  • Bypass ratings of:
    • 1.73 bar / 25 psi
    • 3.5 bar / 50 psi
    • No bypass

Available Media Types

  • Donaldson exclusive Synteq™ – synthetic fiber media for greater filtration efficiency and higher dust-holding capacity
  • Water absorbing media
  • Many different efficiency grades from which to choose


Viton® is registered trademark of E. I. DuPont de Nemours and Company. 


The following are recommended practices for hydraulic filter servicing and handling. These steps are universal to many hydraulic systems. This servicing information is provided as a best practices guide. Donaldson recommends that you follow the filter service instructions supplied by your original equipment manufacturer. These recommended practices are not intended to replace or supersede the service instructions supplied by your equipment or vehicle manufacturer.
  1. Check the filter service indicator
    Check to see that the OEM specified service interval has been reached or that the service indicator shows that the filter is due for servicing.

  2. Turn system off and release pressure
    Ensure that the hydraulic system is turned off.
    Check that there is no pressure present.

  3. Remove the cartridge housing

  4. Remove the used filter and gasket, if applicable
    Properly dispose of the cartridge according to local regulations.

  5. Clean the head seal area and housing
    Clean out any sediment from the inside of the filter housing.

  6. Inspect the new filter cartridge for damage
    Check the new filter you will be installing for any shipping and handling damage. Do not install a damaged filter.

  7. Install and lubricate seals, gaskets and threads. 
    Lubricate the o-rings, gaskets, housing seals and threads with clean system oil.

  8. Install new cartridge into the housing

  9. Align threads. Spin filter until gasket contacts
    Fit the housing to the filter head as instructions on the housing.

  10. Install housing according to manufacturer instructions

  11. Bleed the hydraulic system and check for leaks

Donaldson Hydraulic Filtration Overview

Donaldson provides filters and contamination control products to protect hydraulic components -- in the factory and on heavy-duty equipment. This module provides an overview of hydraulic systems and the advantages of Donaldson hydraulic filters

Donaldson Hydraulic Filter Servicing

Donaldson provides best practices and recommended steps for hydraulic filter servicing. By following these simple steps, discover how you can reduce maintenance costs and extend the life of your hydraulic system