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By-pass: 118 mm / (4.65") x 1 3/8"-16 dia.

118 mm family of lube assemblies features a strong, durable head and by-pass (secondary) filter. It's designed to divert a small portion (-10%) of the system's oil flow back to the sump or oil pan before reaching the primary filter. This secondary system captures smaller contaminants than full-flow filters. Because of the increased efficiency, this filter will be more restrictive and should be located in a separate (bypass) flowpath. On the upside, it gives you a much finer level of contamination control, keeping your oil and lube system clean.


  • By-pass flow applications
  • On- and off-road applications


  • By-pass design for engine protection – removes smaller particulates than full-flow filters – no need for additional oil or oil changes can be reduced 
  • Easy to service, no special tools needed – removing and replacing spin-on filters is hassle free. By using field proven designs, Donaldson is able to offer robust, leak free performance while avoiding the need for specialized tools.


  • Standard design for by-pass filtration – side mount, single port head
  • 3/8" -18 NPTF ports (2x)
  • Spin-on filter
  • Compatible with petroleum based fluids (hydrocarbon)
  • Remote mount for ease of service

Available Media Type

  • Cellulose – cost effectively achieves application efficiency requirements
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 equipment manufacturer.

Lube Spin-On

  1. Unscrew and remove old filter and gasket
    Properly dispose of the used filter according to local regulations

  2. Wipe filter head with a clean cloth

  3. Fill with oil on the dirty side per engine manufacturer recommendations

  4. Apply a thin film of clean motor oil to the gasket

  5. Align threads and spin on filter until gasket contact

  6. Follow icons on filter to tighten

  7. Check oil level

  8. Start engine and check for leaks

  9. Stop engine and recheck oil level

Donaldson Lube Filter Servicing

Donaldson provides best practices and recommended steps for lube filter servicing. By following these simple guidelines, discover how to maximize engine protection and reduce long-term operating costs.