Excavator Boom Cyl Seal Kit 707‑99‑67870 for PC400‑7/PC400‑8 Construction Machinery Parts with 3 Months Warranty

Keywords: 707‑99‑67870, Boom Cylinder Seal Kit, Komatsu PC400‑7 Seal Kit, PC400‑8 Hydraulic Repair Kit, Excavator Boom Cylinder Overhaul Seals, Hydraulic Cylinder O‑ring Gasket Set, Construction Machinery Sealing Parts, Aftermarket Boom Cylinder Seal Repair Kit

Product Overview

Boom Cylinder Seal Kit Part No.707‑99‑67870 is a complete hydraulic overhaul sealing kit specially designed for Komatsu PC400‑7, PC400‑8 excavator boom cylinder. This repair kit includes piston seals, rod seals, wear rings, buffer seals, O‑rings and backup rings for boom cylinder assembly. It provides excellent sealing performance for high‑pressure hydraulic oil circuit, effectively prevents external oil leakage, internal oil bypass and cylinder pressure loss. Our aftermarket seal kit adopts high‑quality oil‑resistant rubber and PTFE composite materials, strictly manufactured and bench‑inspected according to OEM dimensional standards. It owns great high‑pressure resistance, wear resistance and anti‑aging performance, perfectly fits heavy‑load excavation, mining and earth‑moving working conditions. It is a reliable aftermarket spare part for excavator boom cylinder maintenance and complete hydraulic overhaul, comes with 3‑months product warranty.

Detailed Specifications

Key Features & Advantages

• Complete Full‑Set Repair Accessories Contains all required sealing components for one boom cylinder overhaul, no need to purchase scattered individual seals, greatly improve field repair efficiency.
• Strict OEM Dimension Compliance Each seal, wear ring and backup ring matches original cylinder groove size precisely, direct installation without cutting, grinding or secondary modification.
• Heavy‑Duty Composite Sealing Materials Premium nitrile rubber combined with PTFE material, outstanding resistance to high‑pressure hydraulic oil, abrasion and temperature fluctuation.
• Superior High‑Pressure & Anti‑Aging Performance Stable performance under long‑time heavy‑load working, effectively avoid seal cracking, hardening and deformation, prolong boom cylinder service life.
• Cost‑Effective Hydraulic Repair Solution Repair leaking boom cylinder instead of replacing expensive whole cylinder assembly, solve boom slow lifting, insufficient lifting power and oil spill faults, reduce maintenance cost and equipment downtime, supported by 3‑months warranty.

Application Scope

Compatible Equipment List: ‑ Komatsu Excavator PC400‑7, PC400‑8 applying 707‑99‑67870 boom cylinder seal kit ‑ Widely used in mining site, quarry, earth‑moving project for hydraulic boom cylinder leakage troubleshooting and overhaul

Our Company Advantage

We are professional supplier of full‑range Komatsu excavator replacement spare parts. Our product range covers hydraulic seal kits, cylinder components, engine overhaul kits, sensors, solenoid valves and other construction machinery parts. ‑ Large ready stock for various Komatsu hydraulic cylinder seal repair kits ‑ Factory direct wholesale competitive price ‑ Mixed‑order & one‑stop spare‑parts procurement supported ‑ Professional part‑number matching technical support service

Packaging & Shipping

‑ Inner waterproof sealed plastic bag to protect rubber seals away from dust, moisture and ultraviolet damage ‑ Outer reinforced export carton for long‑distance sea and land transportation ‑ Multiple shipping selections: sea freight, air freight, international express for small trial orders ‑ Export documents including Commercial Invoice, Packing List can be provided

Contact Us

If you need more Komatsu excavator seal kits, hydraulic spare parts or other construction machinery replacement components, please send your parts list to us. We will offer our best quotation for you quickly.