45/910300
  • Brand
    D.N.P.
  • Article
    45/910300
  • Machine system
    Hydraulic system
  • Part type
    Quick coupling
  • Machine brand
    JCB
  • Manufacturing type
    Aftermarket
  • All the features
In stock
0.00 ₺
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For the JCB machines: quick coupling 3/4", male 45/910300, an aftermarket part. The card also lists 45/904400.

Both halves must be of the same standard and size, since halves of different standards will not connect or lock fully. Unused couplings should be closed with dust caps, as sand and dirt on the face quickly wear the seals. Relieving line pressure before connecting makes the coupling easy and safe to join. The aftermarket coupling matches the original in size, thread standard and flat-face design and can be used with a genuine mating half. If it does not lock fully when connected, the attachment will not work or pressure builds in the line; relieve the line pressure and connect again. Its seals resist hydraulic oil and heat. The coupling is supplied new and is best used with a dust cap.

Specifications


Part number45/910300
Cross / alternative numbers45/904400
Production typeAftermarket
Part typeQuick coupling
System / groupHydraulic system
Machine makeJCB

Compatibility

The catalogue also has the genuine version of this part. Mating half: quick coupling 3/4", female 45/920047. Other parts are in High-pressure hoses.

Fitting

Fit the coupling to the hose or pipe with a seal suited to the thread and tighten it on its spanner flats without striking the body. Clean the faces before connecting and check the coupling locks fully.

Specifications

  • Machine system
    Hydraulic system
  • Part type
    Quick coupling
  • Machine brand
    JCB
  • Manufacturing type
    Aftermarket
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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
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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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