Hammer pipework kit 980/A6291 JCB 3CX/4CX, aftermarket

980/A6291

Brand
JF Parts
Article
980/A6291
Machine system
Attachments
Part type
Hammer pipework kit
Machine brand
JCB
Manufacturing type
Aftermarket
Compatibility
JCB 3CX, 4CX
Machine series
3CX, 4CX
Additional info
Installation guide included
All the features

In stock

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Hammer pipework kit 980/A6291 is an aftermarket part for the JCB 3CX and 4CX backhoe loaders.

The hammer pipework kit brings together the line parts needed to connect a hydraulic breaker to a backhoe loader. The photo shows the contents: hoses, steel pipes, brackets, clamps, unions and fixings. The card states that an installation guide is included. The kit is listed for JCB 3CX and 4CX backhoe loaders. The hammer line starts at an extra section of the control valve or an attachment valve and runs along the arm to the end of the dipper, while the breaker's return line takes the oil back to tank with low resistance. Before fitting, check that the machine's hydraulic circuit suits a hammer line. After installation, set the working pressure and flow to the breaker maker's figures. The kit is chosen by part number; before fitting, check its contents against the list in the guide.

Specifications

Part number	980/A6291
Production type	Aftermarket
Part type	Hammer pipework kit
System / group	Attachments
Machine make	JCB
Series / model	3CX, 4CX

Compatibility

Other parts are in Hydraulic pipes.

Fitting

Fit the kit in the order given in the guide: brackets and pipes first, then the hoses. After tightening every connection, run the breaker briefly and check the line for leaks.

Specifications

Machine system
Attachments
Part type
Hammer pipework kit
Machine brand
JCB
Manufacturing type
Aftermarket
Compatibility
JCB 3CX, 4CX
Machine series
3CX, 4CX
Additional info
Installation guide included

Questions: 0

No questions about this product.

JCB 3CX / 4CX 07/10/2026 49

JCB 3CX and 4CX hydraulic circuit diagrams by build year, with component keys

There is no single hydraulic circuit for the JCB 3CX and 4CX backhoe loader: it depends on the build year and the pump type. Section E of the JCB service manual (publication 9803/3290-14) gives separate circuits for the gear pump 3CX built before and after September 2007, for the variable flow 4CX (7-spool and 6-spool), and for the 3C-14 (214e) and 3C machines. Below you will find the circuits themselves, the component keys and some notes on tracing the oil flow through a circuit.

Useful articles 07/10/2026 40

JCB 3CX / 4CX Hydraulic Pressure: Settings, Pressure Testing and Causes of Low Pressure

On JCB 3CX and 4CX backhoe loaders with a gear pump, the working pressure of the hydraulic system is limited by the main relief valve in the loader valve: 236–241 bar on machines up to serial number 964124 and 248–252 bar on machines from serial number 964125 (standard and high-pressure hydraulics). It is checked with a 0–400 bar pressure gauge connected to the loader valve test point, with the engine at 1500 rev/min and the oil warmed to 50 °C. Below are the settings, the test procedure and the reasons why pressure drops, taken from the JCB service manual (Section E).

JCB 3CX / 4CX 07/10/2026 18

JCB 3CX / 4CX Hydraulics: Circuit Diagrams, Pumps and Relief Valve Pressures

Section E of the JCB service manual (publication 9803/3290-14) deals with the hydraulic system of the JCB 3C, 3CX and 4CX backhoe loaders. It brings together technical data for the pumps and valve blocks, hydraulic circuits for machines of different build years, valve operation, fault finding tables, and the procedures for pressure testing and for overhauling the pump, valves and rams. The section PDF runs to 302 pages.