An essential main hydraulic gear pump (tandem) 20/911200 by PARKER. This is the heart of the hydraulic system in JCB 3CX and 4CX backhoe loaders. The 41/26CCR model is a dual-section pump, with the front section having a displacement of 41 cc/rev and the rear section 26 cc/rev. It features a 1” parallel keyed shaft, a 2-bolt SAE B mounting flange, and counter-clockwise rotation (when viewed from the shaft end).
To ensure the longevity of the new pump and maintain warranty conditions, it is absolutely mandatory to flush the entire hydraulic system and replace the oil and filters. Contaminants (metal filings) from the old pump will immediately destroy the new component. We strongly recommend:
| Brand | Type / Series / Model |
|---|---|
| JCB | 3CX Backhoe Loaders: 3CX, 3CX (CM), 3CX (CM) Centremount AA AB Engine, 3CX 20 Sideshift, 3CX 30 Sideshift, 3CX 35 Sideshift, 3CX CONTRACTOR Sideshift AA AB Engine, 3CX PC Sideshift Servo AR/AK Engine, 3CX Sideshift AA AB Engine, 3CX Sideshift AR AK Engine, 3CX-4T Centremount AR AK Engine, 3CX-4T PC Centremount Servo AR/AK Engine, 3CX444 SUPER Sideshift, 3CX444 SUPER Sideshift AA AB Engine, 3CX4M Military, 3CXC PC Sideshift Servo AR/AK Engine, 3CXHM 30 Sideshift, 3CXHM 35 Sideshift, 3CXSM, 3CXSM 30 Sideshift, 3CXSM 35 Sideshift, 3CXSM PC Sideshift Servo AR/AK Engine, 3CXSM Sideshift AA AB Engine, 3CXSM Sideshift AR AK Engine, 3CXSM-4T Centremount AR AK Engine, 3CXSM-4T PC Centremount Servo AR/AK Engine, 3CXT 20 Sideshift, 3CXT 30 Sideshift, 3CXT 35 Sideshift |
| JCB | 4CX Backhoe Loaders: 4CX, 4CX444 PC Sideshift Servo AR/AK Engine, 4CXM Military, 4CXSM444 Sideshift AA AB Engine |
The list above is for reference and includes various 3CX/4CX model variants. It is crucial to verify the part number 20/911200 on your old pump.
Failure of the main hydraulic pump means a total loss of working arm functionality and potentially power steering. A failed pump can rapidly contaminate the ENTIRE hydraulic system (including the orbitrol and cylinders) with metal filings, making repair impossible and multiplying costs.
The 20/911200 main hydraulic pump draws hydraulic oil from the tank and compresses it to high pressure (up to 275 bar). It then sends it to the valve blocks, which direct the oil to the cylinders, powering the front loader and rear backhoe arm. As a tandem pump (dual-section 41+26cc/rev), it feeds two separate circuits or combines the flow for increased performance.
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This is the designation for a tandem (dual-section) pump. It means the first (front) section has a displacement of 41 cc/revolution, and the second (rear) section has 26 cc/revolution. CCR stands for Counter-Clockwise Rotation.
The direction of rotation (in this case, CCW - Counter-Clockwise) is always determined by looking at the pump from the shaft end.
The failure of an old hydraulic pump almost always releases millions of tiny metal particles into the system. Leaving the old oil and filters will cause this debris to be sucked into the new pump, destroying it within minutes or hours. This is the main reason for warranty rejection on hydraulic pumps.
Do you have doubts or need confirmation to avoid costly downtime? Call us. Our experts will help you select the right part to get your equipment back to work as quickly as possible.
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