Komatsu PC400/PC450 Oil Pipe Hose

Part Number: 208-979-8421Applicable Equipment: Komatsu PC400, PC450, PC550 Series ExcavatorsProduct Category: Excavator Air Conditioner Refrigerant Hose

Tailored to suit the actual working conditions of medium and large Komatsu excavators, this Komatsu PC400/PC450 oil pipe hose adopts layered steel wire braided structure. The inner rubber layer is specially made to stay stable when in contact with air conditioner refrigerant, while the outer rubber layer is made tough enough to resist outdoor ageing and physical wear. It works safely under daily operating pressure between 20 bar and 30 bar, and can withstand instant peak pressure up to 80 bar. It keeps stable working performance in both frigid low-temperature areas and high-temperature construction zones, covering working temperatures from -40℃ to 120℃. All pipe joints are processed with mature cold pressing technique, which makes the connection firm and airtight, effectively stopping loosening and fluid seepage during long-term machine operation. All overall dimensions are made to match the original vehicle pipeline size perfectly for smooth field assembly.

Serving as an indispensable connecting part for excavator cooling systems, this practical Komatsu PC400/PC450 oil pipe hose links up core AC components to form a complete refrigerant circulation path. It ensures steady cold air supply inside the driver cabin, letting operators work comfortably even during prolonged summer outdoor operations. Apart from conveying cooling medium normally, it can buffer mechanical vibration generated by running equipment and ease position shift of pipelines, reducing wear on joint parts. It also shields internal system parts from dust and muddy water intrusion, maintains stable internal working pressure, and effectively avoids sudden cooling system failures that may pause construction progress.

Field replacement can be done effortlessly without cutting pipes or adjusting original installation structures, helping maintenance crews finish part replacement quickly and get machines back into operation sooner. Resistant to sunlight exposure, surface scratches and grease corrosion, this hose will not go through chemical changes while delivering refrigerant, and it can serve much longer than ordinary generic hoses used on construction machinery.

Before leaving our warehouse, every finished hose undergoes repeated pressure cycle tests, temperature adaptability tests and sealing checks, so its overall performance can fully meet the actual usage demands of Komatsu engineering machines. It is the ideal replacement part for regular overhaul and daily upkeep of excavator air conditioner pipelines, well fit for heavy-duty work scenarios including mining operations, infrastructure building and large-scale earthmoving projects.

We provide six-month quality coverage for this hose, taking charge of all quality issues arising from defective materials and flawed workmanship. Our team can share practical installation tips and daily maintenance advice according to real equipment conditions, and respond promptly to all kinds of on-site usage problems, bringing simple and reliable purchasing experience for machinery managers and maintenance technicians.