John Deere O-Ring – part no. R39304 is a precision sealing component designed to provide dependable sealing performance in a wide range of fluid systems. This O-ring helps prevent leaks, maintain pressure, and ensure proper operation of hydraulic, fuel, and engine systems where a round elastomer seal is required.

Manufactured to John Deere’s OEM standards, the R39304 O-ring is made from a durable elastomeric compound that resists oils, fuels, coolants, and hydraulic fluids — ensuring long service life and reliable sealing under varied operating conditions.

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Key Features

• Genuine John Deere OEM Part – Precisely engineered for correct fit and performance

• Durable Elastomer Construction – Compatible with oils, fuels, coolants and hydraulic fluids

• Prevents Leaks & Maintains Pressure – Provides tight sealing between mating components

• Essential Maintenance Component – Ideal for repair, overhaul, and preventive maintenance

• Versatile Use – Suitable for many sealing applications where this size/spec is required

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Typical Applications — Fits These Machines

The John Deere O-Ring R39304 is used across a range of John Deere equipment where this specific seal size and specification are required. Common application areas include:

Tractors & Utility Equipment

• Compact and utility tractors in 1xxx, 2xxx, 3xxx, 4xxx, and 5xxx Series

• Sub-assemblies in engine, hydraulic, fuel or transmission components where O-ring seals are used

Mowers & Turf Machines

• Riding mowers and zero-turn mowers in John Deere ZTrak, X Series, and 1/2 Series lawn tractors

• Hydraulic or engine service points that require OEM ring replacement

Construction & Forestry Equipment

• Loaders, backhoes, skid-steers, and excavators powered by John Deere engines

• Hydraulic valve blocks, cylinders, and actuator assemblies that use this O-ring

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Product Details

• Product Type: Sealing O-Ring

• Part Number: R39304

• Brand: John Deere Genuine OEM

• Material: Elastomer suited for oil, fuel, hydraulic fluid, and coolant environments

• Application: Seals fluid or air passages, prevents leakage under pressure

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Why Choose the John Deere R39304 O-Ring

The John Deere O-Ring R39304 provides critical sealing where fluid integrity and pressure maintenance are vital for machinery performance. Using a genuine John Deere O-ring ensures precise dimensions and material compatibility with your equipment’s systems — helping prevent leaks, minimise downtime, and reduce long-term maintenance costs. A small but essential component, this O-ring is a key part of routine servicing, repairs, and rebuilds on John Deere engines, hydraulic systems, and other fluid-handling assemblies.