707-99-58080 Boom Cylinder Seal Kit​​ Product Overview​

The ​​707-99-58080 Boom Cylinder Seal Kit​​ is a ​​genuine Komatsu OEM replacement​​ for boom cylinder repairs on ​​Komatsu PC300-7 and PC300LC-7 excavators​​. Engineered to exact factory specifications, this kit restores hydraulic integrity in high-pressure boom systems (up to ​​34.3 MPa/4,975 PSI​​), eliminating leaks and restoring lifting performance. Includes ​​all critical components​​ validated by Komatsu Engineering Standard ​​KES 07.340​​.

​​707-99-58080 Seal Kit Technical Specifications

​​Key Benefits​​

1. ​​Factory Performance Restoration​​
   • Stops boom drift & leakage with ​​OEM-spec dimensional tolerances (±0.02mm)​​.
2. ​​Extended Service Life​​
   • PTFE components provide ​​3,000+ hour lifespan​​ in abrasive environments.
3. ​​Cold-Weather Reliability​​
   • -40°C flexibility prevents brittle fractures (tested per ​​JIS B 2401:2019​​).
4. ​​Reduced Downtime​​
   • Complete gland rebuild in <2 hours with torque specs included.

FAQ:

Q: How to place an order?
A: Please send your inquiry to us directly; we will provide you with the best quote (factory wholesale price) based on your requirements.

Q: How to shipping?
A: If you have a freight forwarder in China, we will delivery to them directly; and we also offer a variety of shipping options for you to choose from. We partner with multiple international logistics providers, including FedEx, DHL, UPS, and EMS etc.

Related Products

• PC300-7 Excavator Bucket Seal Kit 707-99-58090

• PC300-7 Excavator Arm Seal Kit 707-99-67090
  

Note:

This part is designed to meet the manufacturer’s standard specifications for the model. Please verify your equipment’s serial number or the seal kit part number to ensure a correct fit. If you are unsure or cannot locate the appropriate part number, please contact us directly; our professional team will assist you.