966H 966K 966M 966M Lift Hydraulic Cylinder 242-4275 2424275 For Caterpillar Wheel Loader

966H 966K 966M 966M Lift Hydraulic Cylinder 242-4275 2424275 for Caterpillar Wheel Loader

Q. What kind of testing is done on your hydraulic cylinders before delivery?
A. Yes, all our excavator hydraulic cylinders are tested before leaving the factory to make sure they are safe and work properly. We check for pressure strength, oil leaks, and any movement or drift when the cylinder is under load.

Q. What seals do you use in your hydraulic cylinders?
A. We use high-quality seals from Japan NOK and US SKF—two trusted brands known for excellent wear resistance, heat tolerance, and sealing performance, ideal for heavy-duty excavator use.

Each seal is carefully matched to the cylinder’s pressure and working conditions, keeping the oil leakage rate consistently below 1%, even under continuous high-load operation.

This reduces maintenance, minimizes downtime, and extends the life of your hydraulic system—ensuring greater reliability on the job site.

Q. What is your warranty policy?
A. For the following situations,you enjoy 12 months (From the date of B/L) guarantee of free
repairing or replacement service on our supply cylinders: (But we do not take for any annex
responsibilities)

• Welding parts causing fracture
• Material reason causing cylinder fracture
• Rod chrome layer defect causing trachoma or peeling
• Cylinder leaking oil, leaking oil inside

For the following situations, you will not enjoy free repairing or replacement service even during
the guarantee time:

• Improper operating or damaged artificially.
• Smashed by careless operating or carrying during transportation.
• Rod surface smashed, nick; Rod body bending & fracture.
• During Guarantee time, disassembly or replace other un-standard seal kits or components
  without agreement.

Special Attention:
scuffing of cylinder bore is not belong to the guarantee range

Guangzhou Guoli Engineering Machinery Co., Ltd., located in GuangZhou city, benefits from a large construction machinery parts market and convenient transportation access. Our company specializes in producing a range of excavator hydraulic cylinders, including excavator arm cylinders, boom cylinders, bucket cylinders, cylinder tubes, and cylinder rods. With 10+ years expertise, we've established a complete production line from R&D to manufacturing, offering OEM customization and precise part number systems with technical specifications/photos/pricing. We pride ourselves on using premium materials such as high-strength steel and advanced processing technologies to ensure durability and performance.

In addition to hydraulic cylinders, we also provide a comprehensive range of other hydraulic components. This includes hydraulic pumps, swing motor, control valve,travel motors,engine parts,and undercarriage components, all designed for use in various excavator models. Our extensive product portfolio reflects our commitment to delivering complete solutions for construction machinery, ensuring that all critical components are available to meet the needs of our customers.

We serve a global customer base, including clients from Thailand, the Philippines, Indonesia, Malaysia, the United States, Turkey, Russia, Mexico, and many other countries. Our products have been recognized and recommended by local dealers and are highly regarded for their quality and reliability. With our competitive prices, timely delivery, and outstanding customer service, we are committed to providing the best solutions for each client. We warmly welcome inquiries from businesses worldwide and look forward to establishing long-lasting partnerships.