Show Search Menu

FIK In-Tank

FIK in-tank filters are economical, space-saving units offering a variety of options including aluminum or plastic access covers, mounting option, breathers and accessories including diffusers and oil dipsticks. Strong, durable die-cast aluminum head and a steel or plastic canister construction for heavy-duty applications.


  • Cooling Circuits
  • Fluid Conditioning Systems
  • Lube Oil Systems
  • Process Systems
  • Return Lines
  • Side Loop Systems


  • Designed to handle heavy-duty applications
  • Economical, space-saving units offer variety of options
  • Head and inlet sit above the tank, housing remains inside the tank, for design-in flexibility
  • Optional T.R.A.P.™ breathers available
  • Cost-effectively designed so breather can be mounted directly in the filter head
  • Replacement cartridges offered in a range of media types and performance ratings


  • Strong, durable, die-cast aluminum head and steel or plastic canister construction
  • Five different sizes/styles from which to choose: Style A, B, C, D and E
  • Units offer variety of options:
    • Aluminum or plastic access covers
    • Mounting options
    • Breathers and accessories
    • Diffusers
    • Oil dipsticks
  • Optional T.R.A.P.™ Breather technology available with style A and B
  • Three service indicators to choose from:
    • Pressure gauge
    • Visual
    • Electrical
  • Working pressure to: 10 bar / 145 psi
  • Static burst to: 15 bar / 217 psi
  • Flow range to: 644 lpm / 170 gpm
  • Porting size options:
    • 1/2 in., 3/4 in., 1 in. NPT
    • SAE-8, SAE-12, SAE-16, SAE-20, SAE-24 O-ring
    • 2 in. SAE 4-Bolt Flange Code 61
  • Standard bypass rating: 1.5 bar / 22 psi

Available Media Types

  • Donaldson High-Performance DT cartridges with exclusive Synteq™ – synthetic fiber media for greater filtration efficiency and higher dust-holding capacity
  • Natural fiber cellulose
  • Stainless steel wire-mesh
  • Many different efficiency grades from which to choose
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 power off and bleed pressure
    Ensure that the hydraulic system is turned off.
    Check that there is no pressure present.

  3. Remove the housing cover

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

  5. Clean the filter mount, cap and inside the 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. Lubricate the filter gasket with a thin layer of clean motor oil

  8. Install new filter cartridge and spring (if applicable)
    Install filter into the housing.

  9. Reinstall the housing cover

  10. Bleed the 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.

Donaldson Hydraulic Filter Servicing

Donaldson provides best practices and recommended steps for hydraulic filter servicing.