333/Y0256
  • Brand
    JCB
  • Article
    333/Y0256
  • Machine system
    Hydraulic system
  • Part type
    Valve linkage rod
  • Machine brand
    JCB
  • Manufacturing type
    Original
  • All the features
In stock
0,00 ₺
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Control valve linkage rod 333/Y0256 is a genuine JCB part for the JCB machines.

The linkage rod carries the movement of the cab control lever to the valve spool; its length ensures the spool is exactly in neutral when the lever is. A bent rod or worn end fittings cause lever slack, an incomplete spool stroke and slower movements. The rod length is given in the product name, and a rod of another length upsets the neutral setting. The genuine rod is made to the connection dimensions of the JCB backhoe controls and comes with threaded ends and locknuts. Rod length also affects ergonomics, since the wrong length changes the lever position. Recheck the lever free play and return after replacing the rod and joints. The rod is supplied new. The thread at each end is used to adjust the length, and loose locknuts upset the neutral setting. The rod surface is coated against corrosion. Tighten the locknuts after adjusting the length. The rod is chosen by its part number. The rod is chosen by its JCB number.

Specifications


Part number333/Y0256
ManufacturerJCB
Production typeOriginal
Part typeValve linkage rod
System / groupHydraulic system
Machine makeJCB

Compatibility

Other parts are in Hydraulic control valves.

Fitting

Lightly grease the joints and fit the retainers.

Specifications

  • Machine system
    Hydraulic system
  • Part type
    Valve linkage rod
  • Machine brand
    JCB
  • Manufacturing type
    Original
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JCB 3CX / 4CX 07/10/2026 41
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 39
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.
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