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Cylindrical hydraulic filter element, metal end caps, pleated paper media visible inside

Baldwin Filters

Baldwin Filters PT189 Hydraulic Transmission Element 9 3/16 in 23 micron

SKU CH-3CSX-6EBF4

A hydraulic and transmission filter element with a 23 micron rating and 9 3/16 in height fits Caterpillar equipment

  • 23-micron filtration protects hydraulic systems
  • 9-3/16 inch height fits Caterpillar equipment
  • Reinforced centertube adds structural durability
  • 3-15/16 inch diameter ensures proper seal
  • 2-9/32 inch inside diameter matches OEM specs

Baldwin PT189 Hydraulic Transmission Element

This Baldwin Filters PT189 is a hydraulic and transmission filter element designed for Caterpillar equipment. It uses a cartridge design with a 23 micron rating to capture contaminants. A reinforced centertube adds structural strength under pressure. The element measures 9 3/16 in height and 3 15/16 in outside diameter.

Replaces worn hydraulic filter cartridges

Install this element when the existing hydraulic or transmission filter reaches its service interval or shows pressure drop. The 23 micron media restores clean fluid flow to protect pumps and valves. The jump is worth it when scheduled maintenance is due or fluid analysis indicates contamination. No thread size applies, simplifying the swap.

Verify Caterpillar fitment and housing dimensions

Confirm the equipment manufacturer specifies this element for your machine model. Check that the housing accepts a 9 3/16 in tall cartridge with a 3 15/16 in outside diameter. Ensure the 2 9/32 in inside diameter matches the centertube post. Buyers needing a different micron rating or thread connection cannot use this part.

Highlights

  • 23-micron filtration protects hydraulic systems
  • 9-3/16 inch height fits Caterpillar equipment
  • Reinforced centertube adds structural durability
  • 3-15/16 inch diameter ensures proper seal
  • 2-9/32 inch inside diameter matches OEM specs

Specifications

BrandBALDWIN FILTERS

Questions about this item

Will the 9 3/16 in height and 3 15/16 in outside diameter fit my Caterpillar hydraulic housing?

This element measures 9 3/16 inches tall with a 3 15/16 inch outside diameter and a 2 9/32 inch inside diameter, matching the Caterpillar applications listed for the PT189.

What is the correct way to seat the reinforced centertube during installation?

Slide the cartridge straight onto the housing post so the reinforced centertube bottoms out evenly; the most common error is tilting the element, which leaves a bypass gap.

How often should I replace the 23 micron cartridge in normal service?

Replace the 23 micron element at the interval specified by Caterpillar for your machine, or sooner if the differential pressure gauge indicates restriction.

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