JCB Double Main Hydraulic Pump 63cc/rev - 20/925461
High-performance, tandem axial piston double pump, designed for the demanding hydraulic systems of JCB crawler excavators. The variable displacement design allows for intelligent power management, delivering a precisely measured amount of oil to two independent sections. This ensures maximum tractive and digging force while maintaining smooth simultaneous movements. The robust 117 kg body guarantees operational stability at peak pressures reaching nearly 400 bar.
Technical Specification:
- Type: Double variable displacement axial piston pump.
- Displacement: 63 cc/rev (per section).
- Operating Pressure: 343 - 350 bar (peak up to 392 bar).
- Flow Rate: 2 x 148 l/min (at 2700 rpm).
- Rotational Speed: from 600 rpm.
- Net Weight: approx. 117 kg.
Compatibility:
| Model Series | Variants and Production Years |
|---|
| JCB JS 115 |
JS115 [T2] (2005–2008) |
| JCB JS 130 |
JS130 [T0] (1996–2006), JS130LC [T2 JCB] (1996–2009), JS130LC [T3] (2007–2012) |
| JCB JS 145 |
JS145 [T2], JS145 D (2006–2008), JS145 GW, JS145 HD, JS145 TAB, JS145 (2006–2008), JS145DTAB |
Workshop Technical Tip: Due to the weight of the unit (117 kg) and its tandem construction, installation requires professional lifting equipment. Before starting the engine, it is absolutely essential to prime the pump housing with clean hydraulic oil through the highest bleed point. Running "dry" at an operating pressure of 350 bar will lead to immediate seizure of the pistons and the valve plate. We recommend simultaneous filter replacement and checking the suction lines for obstructions.
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