1004 - Bypass Filter/Element | Royac

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Harvard Filter Element 1004 for Cleaner Oil and Fuel

Stay Clean, Stay Efficient!

Filter Element 1004 is your go-to hydraulic filter element for ensuring the purity of your oils and fuels. Designed to be highly effective, it traps contaminants as tiny as 1-micron, ensuring your fluids stay clean and your machinery runs smoothly.


  • Contaminants as low as 1- icron
  • Water & Particles.
  • Does not deplete additive.

Versatile and Reliable

Whether you're dealing with:

  • Diesel fuel
  • Hydraulic oil
  • Engine oil
  • Transmission oil
  • Transformer oil
  • Cutting oil

or other medium-viscosity oil-based lubricants, the 1004 hydraulic filter element has got you covered. 

Optimal Viscosity Range

This filter is ideal for a range of viscosities:

  • Diesel Fuel
  • ISO: 46, 68, 100, 150
  • SAE: 20, 30, 40 

Capacity and Flow at Its Best

Requires 20 Qt./18.9 L. of makeup fluid and is ideal for sumps ranging from 16-250 Gal./60.6-946.4 L., covering both lube and hydraulic needs.

Built to Perform

  • Maximum operating pressure of 80 PSI
  • Dimensions of 19.75” (H) x 7.5” (D)
  • Fit parts, including: 900102, 900101, 900311

Your Trustworthy Filter for Petroleum or Synthetic Fluids & Diesel Fuel.Keep your fluids clean and your operations running smoothly!

Fluid Type:
Lube, Hydraulic, Diesel
Service Sump Size:
16-250 Gallons
Oil Viscosity:
46, 68, 100, 150
Oil Weight:
SAE 20, SAE 30, SAE 40
Make-Up Oil Required (Quarts):