Typical fitment
Main Hydraulic Piston Pump Assembly
Tandem variable-displacement piston pump assembly driving the main winch, slew and telescope circuits on mobile cranes.
Specification
| Type | Axial piston, variable displacement |
|---|---|
| Configuration | Single or tandem, through-drive |
| Control | Load sensing, pressure compensated or electro-proportional |
| Working pressure | Up to 350 bar continuous |
| Displacement range | 55 – 250 cm³/rev |
| Condition | New OEM, quality aftermarket or exchange unit |
Typical specification for this component family. The exact variant is confirmed against your machine's make, model and serial number at quotation.
About this part
The main pump is the heart of a crane's hydraulic system: it converts engine torque into the flow and pressure that drives the winch, slew, telescope and outrigger circuits. A pump that has lost volumetric efficiency shows up as slow hoisting, a boom that will not hold position and rising oil temperature long before it fails outright.
We supply complete tandem and single piston pump assemblies, as well as the rotating groups, swash plates, control valves and shaft seals needed to overhaul a unit you already have. Every assembly is bench-tested for flow and case drain before dispatch.
Send us the pump plate details or the crane make, model and serial number and we will confirm the correct displacement and control option before you commit to an order.
Ordering information
To quote accurately we need the equipment make, model and serial number, plus the part number or a photograph of the component and its nameplate.
