One New Aftermarket Replacement Oil Seal for John Deere (JD) Headers, Mower Conditioners, and Tractors

This dual-lip oil seal is a direct aftermarket replacement for John Deere OEM part number AT21780. It is commonly used in grain head wobble boxes, auger headers, draper headers, and mower conditioner assemblies, as well as tractor input shaft applications on John Deere 20, 30, 40, and 50 series equipment. The dual-lip design provides reliable shaft sealing against oil leakage and contamination ingress.

Specifications

• Outside Diameter: 1.628"
• Shaft Diameter: 1.125"
• Width: 0.256"
• Type: Dual Lip

Compatible Models

John Deere (JD) Headers and Mower Conditioners: 120, 230, 240, 300 Series, 710, 720, 820, 900 Series, 1207, 1209, 1214, 1217, 1219, 1380, 1424, 1600, 1600A

John Deere Tractors: 20 Series, 30 Series, 40 Series, 50 Series

Replaces Part Number(s):

AT21780, A-AT21780-AI, AE53176

Aftermarket Interchange Numbers

SKF CR 11124; Corteco equivalent available

New aftermarket replacement part - not remanufactured, not used.