Aftermarket HPV118 COIL SPRING

Key Specifications

• Component Type: Rotating Group Cylinder Block Central Compression Spring
• Compatible Pump Series: HPV118 Series Variable Displacement Units
• Primary Function: Maintains mechanical face-seal tension between the cylinder block and valve plate
• Material Construction: High-elastic limit, heat-treated spring steel alloy
• Condition: Brand New Premium Aftermarket

Product Overview

This premium aftermarket coil spring (also referred to as a cylinder block spring or central barrel spring) is a high-fatigue mechanical tension component engineered specifically for the core rotating group of the HPV118 series variable displacement axial piston pumps. Positioned at the exact geometric center of the cylinder block, this heavy-duty compression spring exerts continuous, precise outward force against the internal pins and spherical guide. This unyielding mechanical tension keeps the spinning cylinder barrel tightly sealed against the valve plate and holds the piston slippers flush against the swashplate face, ensuring immediate pump priming and preventing high-pressure fluid bypass.