Baldwin PT189 Transmission Oil Filter
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Baldwin

Baldwin PT189 Transmission Oil Filter

Brand Baldwin PT189
Contains Reinforced centertube
Fits Caterpillar equipment
Height 9 3/16
Height (mm) 233.4
Inside Diameter 1 2 9/32
Inside Diameter 1 (mm) 57.9
Notes Use {es4007} for stacked elements.
Optional Gasket "{es1049}, {es1074}, {es4007}, {g229}, {g310}, {g333}, {g342}, {g
Outside Diameter 1 3 15/16
Outside Diameter 1 (mm) 100
Replaces Caterpillar 2m3943
Fits —

Reinforced centertube. Adds strength for dependable filtration performance.

Transmission oil filter. Keeps transmission fluid cleaner for smoother operation.

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Baldwin PT189 Transmission Oil Filter

Baldwin PT189 is a transmission oil filter for Caterpillar equipment, built with a reinforced centertube for added internal support. It is a direct replacement for Caterpillar 2M3943 and is used in transmission service where clean fluid flow and dependable filtration are required.

Key Features

  • Transmission oil filter for Caterpillar equipment
  • Reinforced centertube construction
  • Height: 9 3/16 in. (233.4 mm)
  • Outside diameter: 3 15/16 in. (100 mm)
  • Inside diameter: 2 9/32 in. (57.9 mm)
  • Replaces Caterpillar 2M3943
  • Optional gasket references: ES1049, ES1074, ES4007, G229, G310, G333, G342, G376, G403, G433, G445, G447

Detailed Description

The Baldwin PT189 transmission oil filter is specified for Caterpillar equipment applications that require a service replacement matching the original Caterpillar 2M3943 part. Its reinforced centertube helps maintain element integrity in transmission service, while the listed dimensions support proper housing fitment. For buyers searching for a Baldwin PT189 transmission oil filter for Caterpillar equipment or a Caterpillar 2M3943 replacement, this part provides the core specifications needed for a correct match.

Use the PT189 when servicing Caterpillar transmission systems that call for this filter size and configuration. The optional gasket references listed with the part help identify related sealing options during maintenance and parts lookup.

Common Service Issues Addressed

  • Restricted transmission fluid flow from a loaded or contaminated filter
  • Loss of filtration efficiency during scheduled transmission service
  • Fitment mismatch when replacing Caterpillar 2M3943
  • Internal filter support concerns in demanding equipment use
  • Incorrect gasket selection during transmission filter replacement

Installation Notes and Tips

Verify housing dimensions, gasket reference, and service specifications before installation. Use the PT189 only in Caterpillar equipment applications that call for this transmission oil filter size and replacement reference. For stacked elements, use ES4007 as noted by the manufacturer. Confirm the sealing surface is clean and inspect the housing before installing the new filter.

Quality Assurance

Baldwin is a recognized filtration brand in heavy-duty and equipment service applications. PT189 is built to match the listed dimensions and replacement reference for Caterpillar transmission maintenance.

Related reading

This part fits 0 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelPositionNotes