Meritor A11205A2731 Genuine Pinion Oil Seal Assembly

Product Overview

Meritor Genuine A11205A2731 oil seal assembly used in applicable Meritor drive-axle pinion bearing-cage and carrier assemblies.

Part Number and Supersession

• Current manufacturer number: A11205A2731
• Confirmed replaced number: A1205Q2591

Technical Identification

• Manufacturer: Meritor Genuine / Cummins Drivetrain and Braking Systems
• Product type: Pinion oil seal assembly
• Known system: Drive-axle pinion bearing cage / differential carrier
• Known kit usage: Multiple Meritor bearing-and-seal, pinion-cage, and axle rebuild kits

Manufacturer-Listed Reference Numbers

• Automann: 181100557, 181CR32503
• Industry/reference numbers listed by Meritor: 32503, CR32503, NAT100557, AS2731

Reference numbers are provided from the official Meritor product record. Confirm seal dimensions, sealing surface, axle model, pinion-cage design, and installation requirements before substitution.

Application Notes

This seal appears in official Meritor bills of material for several carrier and axle assemblies, including RS/RR 23-series configurations. Exact fitment must be established from the axle identification tag, carrier model, bill of material, and existing seal number.

Please confirm the original part number, axle identification, and application before ordering.

Parts Verification and Ordering Notice

Please confirm the existing part number, component identification tag, dimensions, sealing surface, specifications, and application before ordering. Cross-reference numbers, compatibility guides, service manuals, repair manuals, parts catalogs, PDF references, and application information are provided as reference material only and may contain errors, omissions, superseded information, or model-specific differences. Do not rely solely on a reference number, manual, catalog, or guide when selecting a part. Please contact All Truck Gears before ordering when the application or interchange is uncertain.

Technical References and OEM Documentation

• Meritor Parts Xpress — A11205A2731 Official Product Record

Verified OEM Document References

• SEALBOOK: Meritor seal technical bulletin referenced by the official product record
• SP16165: Cummins Drivetrain and Braking Systems Aftermarket Warranty
• Drive Axle Product Information: Referenced by Meritor Parts Xpress