Komatsu Part O-RING 426-60-31820

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Product Overview

The 426-60-31820 O-RING is a genuine Komatsu OEM replacement O-ring from the 426 prefix series. O-rings provide the seal at thousands of connections throughout your Komatsu machine — each one compresses into a precision-machined groove to block the escape of pressurized hydraulic oil, fuel, coolant, or lubricant.

Part Number: 426-60-31820 Part Name: O-RING Part Type: OEM Komatsu Replacement Seal Availability: In stock

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When to Replace

• Fluid visible at the sealed connection — even a small weep will worsen over time
• The O-ring has hardened, cracked, or taken a permanent compression set (flat spot)
• Cuts, nicks, or extrusion damage visible on the seal surface
• The joint was opened for any service work — O-rings should never be reused once they've been compressed in service

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Installation

1. Confirm 426-60-31820 matches the old seal's dimensions
2. Clean the groove thoroughly — old seal fragments and debris create leak paths
3. Apply a thin film of clean hydraulic oil to help the O-ring seat without rolling
4. Position the O-ring without twisting — a rolled or twisted seal leaks immediately
5. Tighten the connection to the specified torque — over-tightening can extrude the seal

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Request a Quote

Need the Komatsu 426-60-31820 O-RING? Contact us through the form or by phone, email, or WhatsApp. We respond within one business day.