128/C2652
  • Article
    128/C2652
  • Machine system
    Hydraulic system
  • Part type
    Hydraulic pipe
  • Machine brand
    JCB
  • Manufacturing type
    Aftermarket
  • All the features
In stock
0.00 ₺
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For the JCB machines: hydraulic pipe 128/C2652, an aftermarket part.

The brackets and welded fixings on the pipe set its position on the machine, and on the new pipe they must sit where they were on the old one. Pipes are protected from corrosion with zinc or a similar coating, so take care not to scratch it during fitting. The union threads and seals at the pipe ends must be clean, since a dirty union leaks and carries dirt into the hydraulic system. When fitting, start every connection by hand first and then tighten the clamps and unions; this order keeps the pipe free of strain. The pipe is chosen by part number and compared with the old one for shape, end fittings and brackets. The aftermarket pipe comes new with its ends capped for transport. A leaking pipe not only loses oil but can also let dust and dirt into the system.

Specifications


Part number128/C2652
Production typeAftermarket
Part typeHydraulic pipe
System / groupHydraulic system
Machine makeJCB

Compatibility

Other parts are in Hydraulic pipes.

Fitting

Before fitting, release the system pressure and cap the hoses. Put the new pipe in place, start the connections by hand, then tighten the clamps and unions; start the engine and check for leaks. Do not bend or force the pipe during fitting, since a pipe under strain cracks.

Specifications

  • Machine system
    Hydraulic system
  • Part type
    Hydraulic pipe
  • Machine brand
    JCB
  • Manufacturing type
    Aftermarket
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JCB 3CX / 4CX 07/10/2026 38
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 38
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 15
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.
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