458/20446
  • Brand
    CORA
  • Article
    458/20446
  • Machine system
    Transmission
  • Part type
    Wheel hub
  • Machine brand
    JCB
  • Manufacturing type
    Aftermarket
  • Compatibility
    JCB 3CX, 4CX
  • All the features
In stock
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Wheel hub (5-stud) 450/10221 is an aftermarket part for the JCB 3CX and 4CX backhoe loaders.

The wheel hub is the body to which the wheel is bolted by studs and which carries the hub bearings; it works with the planetary gearbox and passes the wheel load to the axle end. A hub with worn bearing seats or elongated or cracked stud holes causes wheel play, oil leaks and loose wheel nuts. Because the hub carries the wheel load, cracks are looked for especially around the stud holes.

Specifications


Part number450/10221
Production typeAftermarket
Part typeWheel hub
System / groupTransmission
Machine makeJCB

Compatibility

According to sources, 450/10221, 450/11100, 458/10226 and 458/20446 are numbers of the same 5-stud wheel hub, used on JCB 3CX, 4CX and 214-217 backhoe loaders. Other parts are in Reduction gears.

Fitting

For the change, remove the wheel and planetary gearbox and drain the oil. Press the bearing cups into the new hub, fit the seals and install the hub, setting the bearing preload to the service manual. Fit the studs, reassemble and fill the planetary and tighten the wheel nuts to the specified torque. The hub comes new; before fitting, clean and check the bearing seats, seal faces and stud holes. Parts moved over from the old hub (studs, covers) are renewed if damaged. After the wheel is fitted, tighten the nuts in a cross pattern to the specified torque and recheck them after the first hours of work.

Specifications

  • Machine system
    Transmission
  • Part type
    Wheel hub
  • Machine brand
    JCB
  • Manufacturing type
    Aftermarket
  • Compatibility
    JCB 3CX, 4CX
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JCB 3CX / 4CX 07/10/2026 37
JCB 3CX PD70 rear axle parts breakdown: drawings and part numbers from the JCB catalogue
This article brings together the drawings and parts lists for the PD70 rear axle of the JCB 3CX backhoe loader from the JCB parts catalogue: the complete axle, the axle arm with hub reduction and brake plates, the drive head with brake pistons, the differential and the remote breather. The example is axle 450/44530 with a 15.78:1 ratio and limited slip differential, fitted to 3CX-T machines with front wheel steering (catalogue 9812/0010, serial numbers 00960000–00989999, 01297000–01297999, 01327000–01349999, 01616000–01621599, 01705500–01709999). Part numbers shown as links open the product pages in our catalogue.
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JCB 3CX / 4CX Rear Axle Overheating: Causes and What to Check
The rear axle of a JCB 3CX or 4CX backhoe loader runs hotter than the front axle by design: it houses the oil-immersed service brakes, one multi-plate brake pack on each half shaft. A warm axle casing after a shift is therefore normal. It becomes a concern when the axle gets very hot after an ordinary road run, the machine feels as if it is dragging, there is a smell of burnt oil from the axle, or oil starts leaking past the seals. The usual cause is brake drag: the service brakes or the park brake are not releasing fully. Below, based on the JCB service manual, is what to check and in what order.
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JCB 3CX / 4CX Transmission: Gearboxes, Axles, Pressures and Stall Test
Section F of the JCB service manual covers the transmission of the JCB 3C, 3CX and 4CX backhoe loaders: Synchro Shuttle SS700, Powershift PS764 and PS766 gearboxes, torque converter, front and rear axles, propshafts and oil cooler. It contains technical data, gearbox operation and electrics, pressure tests, the torque converter stall test, fault finding tables and removal procedures. This is issue 9803/3290-16 of the manual; the PDF runs to 306 pages.
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