Duramax® HNK04/05 Hydraulic Spin-On Assemblies

HNK Duramax® filters utilize a RadialSeal™ design for easier servicing and more reliable seal without having to torque to specification. Synteq™ filter media maintains high filtration efficiency and higher dust-holding capacity. Improved performance including higher burst, greater fatigue strength and longer filter life. Both the HNK04 and HNK05 are class leaders. Use the HNK05 in applications that need higher flow.

Features

• Strong, durable die cast aluminum head
• Variety of indicator types and by-pass options
• Working pressures to: 
  • HNK04: 34.5 bar / 500 psi
  • HNK05: 24.1 bar / 350 psi
• Rated static burst to: 69 bar / 1000 psi
• Flow range to: 
  • HNK04: 133 lpm / 35 gpm
  • HNK05: 189 lpm / 50 gpm
• Porting size: 
  • HNK04: SAE-12 and SAE-16 o-ring
  • HNK05: SAE-20 o-ring
• Standard by-pass ratings:
  • 3.5 bar / 50 psi
  • No by-pass

Benefits

• Proven Duramax filters deliver dependable performance 
• Synteq™ media, Donaldson's exclusive synthetic fiber media for greater filtration efficiency and higher dust-holding capacity
• Greater fatigue strength
• Longer filter life
• Higher burst pressures
• RadialSeal™ design for easier servicing and more reliable seal

Applications

• Fluid conditioning systems
• Case drains
• Cooling circuits
• Fuel transfer
• Hydrostatic charge pumps
• Lube oil systems
• Power transmissions
• Return lines
• Side loop systems
• Pilot circuits

Available Media Types

• Donaldson exclusive Synteq™ – synthetic fiber media for greater filtration efficiency and higher dust-holding capacity
• Choice of efficiency grades

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.

Spin-On Filter 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. Unscrew and remove the old filter and gasket
   Properly dispose of the used filter according to local regulations.
    
4. Wipe the filter head with a clean cloth
   
   
5. Inspect the new filter for damage
   Check the new filter you will be installing for any shipping and handling damage. Do not install a damaged filter.
   
   
6. Lubricate threads
   
   
7. Apply a thin film of motor oil to the gasket
   
   
8. Align threads – spin filter until gasket contact
   Fit the housing to the filter head as instructed on the housing.
   
   
9. Follow the icons on the filter to tighten
   Do not over-tighten.
   
   
10. Bleed the system and check for leaks