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HPK05 Cartridge

The HPK05 high pressure filter series is made of ductile iron and steel for strength and durability. Machined bypass valves are case-hardened at critical points to provide maximum strength and reliability. Reverse flow bypass valve allows bi-directional flow through the filter head, with head-up or head-down mounting capabilities.


  • High Pressure Circuits
  • Hydrostatic Transmission
  • In-Plant Systems
  • Lube Oil Systems
  • Mobile Equipment


  • Rugged construction for reliable performance – ductile iron and steel for strength and reliability
  • 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


  • Reverse flow bypass valve allows bi-directional flow through the filter head
  • Versatile head-up or head-down mounting capabilitiy
  • Machined bypass valves are case-hardened at critical points to provide maximum strength and reliability
  • High-collapse filters available
  • Viton® seals are used on high-performance DT filters
  • Buna-N® seals are used on standard filters
  • Multiple indicators: visual and AC/DC visual/electrical options
  • Working pressure to: 3000 psi / 206.8 bar
  • Rated static burst to: 6000 psi / 413.6 bar
  • Flow range to: 200 gpm / 757 lpm
  • Porting size options: 2" SAE 4-Bolt Flange Code 61 
  • Standard bypass ratings of: 
    • 60 psi / 4.1 bar
    • 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® and Buna-N® are 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. Use housing drain port to remove dirty oil from the housing 

  4. Unscrew the housing

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

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

  7. 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.

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

  9. Install new cartridge onto head

  10. Align housing threads with head – screw on housing, torque to 115 lb. ft maximum

  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.