A-AT21780-AI Seal, Oil
A-AT21780-AI Seal, Oil
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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.
