KOMATSU 709-70-71610 SEAL

The Komatsu 709-70-71610 Seal is a genuine sealing component designed to keep hydraulic cylinders on Komatsu bulldozers and excavators operating leak-free under sustained pressure. Fitted at the piston or rod end of the cylinder assembly, it creates a barrier that keeps hydraulic oil contained while blocking dust, grit, and moisture from working their way in — a small part doing a job that has an outsized effect on how well the whole hydraulic circuit holds up over time.

Built to Komatsu’s factory specifications, this seal is manufactured from a wear-resistant compound engineered to handle continuous exposure to hydraulic fluid, high internal pressure, and the repeated friction that comes from cylinder rod movement. It’s designed to keep its sealing edge intact through long operating cycles and temperature swings, rather than hardening or losing shape the way lower-grade substitutes tend to. Because it’s produced to precise dimensional tolerances, it seats correctly the first time and holds a consistent seal for the long haul.

Given how central this seal is to cylinder performance, fitting the genuine Komatsu part rather than a rough equivalent is one of the more cost-effective maintenance decisions an owner can make. A worn seal here can lead to slow oil loss, spongy cylinder response, or contamination reaching the piston — all problems that are far cheaper to prevent than to repair once a cylinder needs a rebuild.

Technical Features

• Genuine Komatsu-spec cylinder seal
• Wear-resistant sealing compound
• Withstands sustained hydraulic pressure and fluid exposure
• Resists friction wear from repeated cylinder rod movement
• Manufactured to precise factory tolerances for correct seating
• Helps prevent oil leakage and contamination ingress
• Supports long-term hydraulic cylinder performance

Compatible Machine Models

Komatsu Bulldozer

• D41E-6
• D41P-6
• D61E-12

Komatsu Excavator

• PC200-6-A
• PC200-6Z
• PC200-7
• PC200-8
• PC200CA-6

Alternative Part Numbers

• 07001-01009
• 07000-12105
• 23B-22-11380

Shop & Supply keeps the Komatsu 709-70-71610 Seal in stock and ready to ship, alongside a full catalog of genuine seals and O-rings for Komatsu dozers and excavators. Choosing the original Komatsu part means the material grade, tolerances, and pressure rating match exactly what the cylinder was engineered around — keeping your hydraulic system tight, efficient, and reliable for the long run.