After-Sales Service

• Hydraulic Equipment Quality Assurance
• Hydraulic Cylinder Operation & Installation Guide
• Hydraulic Cylinder Maintenance & Service Support

Thank you for choosing JW Hydraulic Limited!

To achieve optimal performance and safe operation, please read this instruction and maintenance guide carefully.
Following these recommendations will help your hydraulic cylinders maintain peak efficiency and extend service life.

Product Overview

Our hydraulic cylinders are engineered to withstand pressures up to 700 bar (10,000+ PSI), designed for demanding applications in marine, industrial, and heavy machinery environments. Operators should have relevant experience and strictly follow safety procedures to ensure safe usage.

When selecting the cylinder bore, piston rod diameter, stroke, and working pressure, consider your hydraulic system’s pressure source and any pressure loss. The pressure regulating valve determines safe operational limits, so correct selection is essential.

Recommended Hydraulic Oil

To maximize performance, always use HM anti-wear hydraulic oil. Avoid contamination or mixing with dirt, which can scratch the cylinder surface, damage seals, and cause internal leakage.

For initial operation, run the cylinder at low pressure above the starting pressure for several cycles. Only begin normal operation once all air is exhausted from the cylinder barrel. Ensure combined gaskets are used at all oil inlets and outlets to prevent leaks.

Installation Guidelines

• Align the connecting head of the piston rod with the cylinder head and trunnion to maintain rod straightness.
• Avoid piston rod deflection caused by frame deformation, filter sludge, or excessive load, as this can lead to rigid interference or cylinder binding.
• For cylinders installed in filters, regularly clean accumulated sludge to ensure smooth movement.

Seal Application & Replacement

JW Hydraulic cylinders primarily use HALLITE® seals, unless custom kits are specified.

• Inspect seals regularly based on operating conditions.
• Replace worn or damaged seals promptly to avoid oil leakage and production losses.
• Monitor hydraulic oil condition to maintain optimal performance.

Maintenance Best Practices

• Check hydraulic oil for cleanliness and compatibility; filter or replace if necessary.
• Replace seals after 6,000 working hours or earlier if required.
• Regularly operate idle cylinders to lubricate components and prevent rust.
• For high-pressure cylinders, design your system with exhaust devices and overload relief valves to ensure safety.
• Always depressurize and isolate the system before disassembly. Move the piston rod to the bottom of the cylinder and never strike it with hard objects during repairs.

Warranty & Technical Support

JW Hydraulic guarantees the quality and performance of all products according to international standards and contract specifications.

• Standard : 2-year free maintenance, 5–10 years warranty for special case.
• Lifetime technical consulting: All customers receive free guidance on troubleshooting, upgrades, and system optimization.
• Manufacturing defects: JW Hydraulic provides free repair or replacement within 12 months if confirmed to be caused by manufacturing errors.

Safety & Operational Tips

• Always follow safety instructions and maintain proper pressure limits.
• Regular inspection and maintenance reduce downtime and extend the life of your cylinders.
• Keep the working environment clean and free of contaminants to ensure reliable operation.

Why Choose JW Hydraulic Cylinders

• High-pressure reliability: Designed for up to 700 bar.
• Durable components: Hardened rods, precision-machined barrels, and high-quality seals.
• Comprehensive support: Warranty, maintenance, and lifetime technical consulting.
• Global compliance: Products meet ABS, DNV, Lloyd’s, and ISO standards.

Contact Us

For maintenance, repair, or technical support, contact our team today. Trust JW Hydraulic to keep your cylinders operating safely and efficiently.