Komatsu Part O-RING 720-S0-11920

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Product Overview

The 720-S0-11920 O-RING is a genuine Komatsu OEM replacement O-ring from the 720 prefix series. O-rings seal hydraulic, fuel, and cooling system connections by compressing between mating components to block pressurized fluid from escaping.

Part Number: 720-S0-11920 Part Name: O-RING Part Type: OEM Komatsu Replacement Seal Availability: In stock — ready to ship

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When to Replace

Replace the 720-S0-11920 when any fluid leak is visible at the sealed connection; when the O-ring is hard, cracked, or shows compression set; when cuts, nicks, or extrusion are visible; or every time the joint is opened for service.

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Installation

1. Confirm 720-S0-11920 matches the old seal
2. Clean the groove — debris creates leak paths
3. Lubricate with clean hydraulic oil
4. Seat without twisting
5. Tighten to spec

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Request a Quote

Need the Komatsu 720-S0-11920 O-RING? Contact us through the form, or by phone, email, or WhatsApp. We respond within one business day.