YNF17045 Valve Plate L HPK055 Left Valve Plate for Excavator Hydraulic Pump

The YNF17045 Valve Plate L, engineered for the HPK055 hydraulic pump, plays a crucial role in regulating hydraulic oil flow and maintaining precise distribution within the pump’s rotating group. As one of the most important components in the hydraulic circuit, the left valve plate ensures smooth piston movement, stable pressure delivery, and consistent pump performance. When worn, scratched, or warped, the valve plate can cause internal leakage, pressure drop, overheating, and significant hydraulic inefficiency.

Manufactured from heat-treated alloy steel and precision-ground to achieve exceptional flatness, the YNF17045 valve plate offers excellent durability and resistance to high-pressure working environments. Its refined machining ensures proper sealing and optimizes hydraulic output, making it a preferred replacement part for maintenance shops, hydraulic rebuild centers, and aftermarket distributors.

Replacing the left valve plate during pump overhaul significantly improves reliability, reduces downtime, and restores full pump performance for excavators working under heavy-duty conditions.