Variable Displacement Swash Plate Axial Piston Pump 169-4882 For 120H 135H Motor Grader

Hydraulic Piston Pump Introduction

The 169-4882 hydraulic piston pump is a swashplate variable displacement axial piston pump. Its core principle is to achieve stepless variable displacement by adjusting the swashplate angle, precisely controlling the output flow and pressure according to load requirements, thereby improving energy efficiency and reducing heat generation. The drive shaft drives the cylinder block to rotate, and multiple pistons inside the cylinder are connected to the swashplate via slippers, reciprocating axially as the cylinder block rotates—the suction-side piston extends to draw in oil, and the pressure-side piston retracts to discharge oil. The larger the swashplate angle, the longer the piston stroke and the larger the displacement; when the angle is zero, the displacement is zero. This pump is typically equipped with a pressure compensation or load-sensing control mechanism to achieve constant pressure or load-sensitive functions.

Compact swashplate piston pump developed for broad use in both industrial power units and mobile hydraulic systems. It offers very low pressure pulsation along with extended service life, achieved through hardened pistons, advanced valve plate design, and optimized internal flow paths. This pump provides consistent, smooth output and maintains excellent efficiency even during frequent load changes, making it a dependable solution for equipment where space is limited but performance cannot be compromised.

Hebei Runhe Hydraulic Machinery is a key player in the domestic hydraulic industry. With 12+ years of experience, it supplies hydraulic cylinders, pumps and motors to automation, port and printing sectors. It supports customization via customer drawings and ensures product compatibility with major global brands.

Hydraulic Piston Pump Models

Package

Normally, it is packaged in cardboard boxes and then shipped on pallets or wooden crates. Special requirements from customers can be discussed and negotiated.

FAQ

Q: Can this pilot pump directly replace the original?

A: Yes, the high-quality compatible pilot pump has the same installation dimensions and performance parameters as the original, and can be directly replaced without modifying the piping.

Q: I couldn't find my model. Can I still use it?

A: We recommend providing your excavator's specific model number, a photo of the main pump, or the original pump's nameplate information. We can help you confirm compatibility free of charge.

Q: What is the warranty period?

A: We offer a one-year warranty.