Komatsu Part JOINT 175-71-21261

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Product Overview

The 175-71-21261 JOINT is a genuine Komatsu OEM replacement joint. Joints connect sections of fluid lines, mechanical linkages, or structural assemblies — enabling assembly and disassembly while maintaining leak-tight sealing or secure mechanical connection between the joined sections.

Part Number: 175-71-21261 Part Name: JOINT Part Type: OEM Komatsu Replacement Component Availability: In stock

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When to Replace

Joints fail most commonly at the sealing interface — the O-ring groove, flare seat, or tapered thread that creates the seal. Once that surface is pitted, scored, or deformed, no amount of tightening will produce a leak-free connection. Threads also degrade from repeated assembly and disassembly cycles, from overtightening that stretches the material, and from corrosion that reduces the thread engagement strength.

• Leaks at the sealing interface that persist after tightening — the sealing surface is damaged
• Threads that show galling, stripping, or deformation
• Corrosion, pitting, or cracks visible on the joint body
• The drive hex or flats are rounded — the fitting can no longer be properly torqued

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Installation

1. Confirm 175-71-21261 in your Komatsu parts catalog
2. Clean the threads and sealing surfaces on both connection ends
3. Install new O-rings or seals if the joint uses them
4. Apply thread sealant if specified for the application
5. Tighten to the specified torque — overtightening damages the sealing surface
6. Pressure test and check for leaks at the joint

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Request a Quote

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