
Pin Spring 1/8 x 1-3/8
Pin Spring 1/8 x 1-3/8
Application: EMD water pump assemblies
Part of our Water pump product line
The Pin — Spring 1/8 × 1-3/8 is identified by EMD Part No. 273703 and DLW Part No. 20330133. EMD water-pump parts references identify 273703 as a Spring Pin, 1/8 × 1-3/8, while EMD maintenance documentation describes the component as a roll pin of the same size. The part is associated with the water-pump housing/support arrangement and should be identified using the correct EMD and DLW part numbers and specified dimensions when sourcing or replacing it.
How This Part Works
The Pin — Spring 1/8 × 1-3/8 is a retaining and locating pin used in the water-pump housing/support arrangement. It secures the applicable component in its specified position within the assembly. EMD maintenance documentation specifically records the 273703 pin in connection with the water-pump support housing.
Signs It's Time to Replace
- Visible deformation: bending, distortion, or other physical damage can affect the pin's proper fit
- Cracking or breakage: visible cracking or breakage can compromise the pin's retaining function
- Corrosion: significant corrosion or material deterioration should be evaluated for serviceability
- Loose fit: abnormal looseness at the pin location can indicate wear or deterioration of the pin or its mating hole
- Improper dimensions: replacement should match the specified 1/8 × 1-3/8 inch configuration
Apex focuses on EMD engine components and water-pump system parts for EMD applications. The Pin — Spring 1/8 × 1-3/8 is identified by EMD Part No. 273703 and DLW Part No. 20330133, allowing customers to source the component using established EMD and DLW references. Its precise identification by part number and dimensions helps customers select the correct spring pin for the applicable EMD water-pump housing arrangement.
See all Water pump parts →- Engine Compatibility
- EMD 645 & EMD 710 Series
- Applications
- Locomotive · Marine · Power Generation
- Quality Standard
- ISO 9001:2015 Certified · OEM Grade






































