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AT21780 Seal, Oil – Fits John Deere
AT21780 Seal, Oil – Fits John Deere – additional image 2AT21780 Seal, Oil – Fits John Deere – additional image 3AT21780 Seal, Oil – Fits John Deere – additional image 4

NC-087015 · Bearings, Bushings, Seals

AT21780 Seal, Oil – Fits John Deere

CAD 23.17

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Seal, Oil – reference AT21780. Catalogue-listed applications: John Deere. View photos, specifications, CAD pricing and delivery options from NorthCore.

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Part specifications and references

NorthCore code
NC-087015
Reference numbers
AT21780, A-AT21780-AI, 30, 40
Listed package quantity
1
Product information and configuration
Quantity indicated in catalogue: 1

Replacement part: Seal, Oil. 

Configuration: Oil Seal for John Deere (JD) Headers, Mower Conditioners, and TractorsThis 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 ModelsJohn Deere (JD) Headers and Mower Conditioners: 120, 230, 240, 300 Series, 710, 720, 820, 900 Series, 1207, 1209, 1214, 1217, 1219, 1380, 1424, 1600, 1600AJohn Deere Tractors: 20 Series, 30 Series, 40 Series, 50 Series
Replaces Part Number(s):AT21780, A-AT21780-AI, AE53176Aftermarket Interchange NumbersSKF CR 11124; Corteco equivalent availableNew aftermarket replacement part - not remanufactured, not used.

Reference numbers: AT21780, A-AT21780-AI, 30, 40
Application notes
  • One New Aftermarket Replacement Oil Seal for John Deere (JD) Headers, Mower Conditioners, and TractorsThis 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 ModelsJohn Deere (JD) Headers and Mower Conditioners: 120, 230, 240, 300 Series, 710, 720, 820, 900 Series, 1207, 1209, 1214, 1217, 1219, 1380, 1424, 1600, 1600AJohn Deere Tractors: 20 Series, 30 Series, 40 Series, 50 Series Replaces Part Number(s):AT21780, A-AT21780-AI, AE53176Aftermarket Interchange NumbersSKF CR 11124; Corteco equivalent availableNew aftermarket replacement part - not remanufactured, not used.

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