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HPK02 Cartridge

The HPK02 is a heavy-duty filter built for high pressure applications, with cast aluminum head and impact-extruded aluminum housing for strength and durability at relatively lightweight. Available with choice of visual or AC/DC electrical indicators and bypass options.


  • High Pressure Circuits
  • In-Plant Systems
  • Mobile Equipment
  • Power Steering Circuits
  • Servo Valve Circuits


  • Rugged and reliable construction
  • Highly configurable – Flexible mix and match system of in-stock heads, housings and cartridges
  • Multiple filter types and media efficiency options – allowing you to achieve the performance you need for most any application
  • Featuring our high-performance DT filters or standard filters with multiple efficiency options – allowing you to achieve the performance you need for most any application


  • Strong, durable cast aluminum head and impact-extruded aluminum housing construction is relatively lightweight
  • Indicator options:
    • Visual
    • AC/DC electrical
  • Fluorocarbon (such as Viton® and Fluorel®) or Buna-N seals available
  • Meets HF2 specifications (HF2-sized filters contain Synteq™ media)
  • Working pressure to: 139.7 bar / 2000 psi
  • Rated static burst to: 310.1 bar / 4500 psi
  • Flow range to: 76 lpm / 20 gpm
  • Porting size options: SAE-12 O-ring
  • Standard bypass ratings of: 
    • 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
  • Many different efficiency grades from which to choose


Viton® is a registered trademark of E. I. DuPont de Nemours and Company. Fluorel® is a registered trademark of 3M 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.