Hydraulic HPK04 Cartridge Assembly

The HPK04 high pressure filter series is made of ductile iron and steel for strength and durability. Machined by-pass valves are case-hardened at critical points to provide maximum strength and reliability. Reverse flow by-pass valve allows bi-directional flow through the filter head, and filter change out is simplified with standard housing drain plug. Meets HF3 specification.

Features

• Machined by-pass valves are case-hardened at critical points to provide maximum strength and reliability
• Meets HF3 specification
• Reverse flow by-pass valve allows bi-directional flow through the filter head
• Standard housing drain plug simplifies filter change out
• Three housing length options for design flexibility
• High collapse filters available for use with non-by-pass applications
• Fluorocarbon seals are standard
• Multiple indicator: visual and AC/DC visual/electrical options
• Working pressure to: 413.8 bar / 6000 psi
• Rated static burst to: 1173 bar / 17,000 psi
• Flow range to: 454 lpm / 120 gpm
• Porting size options: 
  • SAE-20 o-ring
  • 1-¼" or 1-½" SAE 4-Bolt Flange Code 61 or 62
• Standard by-pass ratings of: 
  • 4.1 bar / 60 psi
  • 6.2 bar / 90 psi with reverse-flow check valve
  • No by-pass

Benefits

• Rugged construction for reliable performance – ductile iron and steel for strength and reliability
• Highly configurable – flexible mix and match system of in-stock heads, housings and cartridges
• Featuring our high-performance DT filters with multiple efficiency options – allowing you to achieve the performance you need for most any application

Applications

• High pressure circuits
• Hydrostatic transmission
• Mobile equipment
• Servo valve circuits

Available Media Types

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

This servicing information is provided as a best practices guide. It is not intended to replace or supersede the service instructions supplied by your engine or vehicle manufacturer.

Cartridge Servicing

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