Planetary annulus carrier 450/12702, aftermarket

450/12702

Brand
BOYPAR
Article
450/12702
Machine system
Transmission
Part type
Annulus carrier
Machine brand
JCB
Manufacturing type
Aftermarket
Compatibility
JCB 3CX, 4CX
All the features

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Planetary annulus carrier 450/12702 is an aftermarket part for the JCB 3CX and 4CX backhoe loaders. This part is the hub that carries the planetary annulus gear (annulus carrier).

The planetary gearbox at the wheel end consists of the sun (central) gear, the planet gears and the internally toothed annulus (ring) gear. The sun gear, turned by the axle shaft, drives the planets, which roll inside the annulus and turn the hub carrier and so the wheel, slower but with more torque. Pitting, chipped teeth or heavy wear cause whine, knocking and metal particles in the oil. The planetary oil level is checked regularly.

Specifications

Part number	450/12702
Production type	Aftermarket
Part type	Annulus carrier
System / group	Transmission
Machine make	JCB

Compatibility

According to sources, 450/12702 and 450/10204 are the planetary annulus carrier of JCB 3C, 3CX, 3D, 4C, 4CX and 214-217 backhoe loaders. Other parts are in Reduction gears.

Fitting

For the change, remove the wheel, drain the planetary oil and take off the hub carrier. Fit the gears with their pins and bearings the right way round, making sure the sun gear circlip seats properly. Renew the gaskets, tighten the bolts to the specified torque and fill the planetary with the specified oil. The gear comes new; before fitting, check the teeth for burrs or impact marks. Hold the planet gear needles in place with grease during assembly.

Specifications

Machine system
Transmission
Part type
Annulus carrier
Machine brand
JCB
Manufacturing type
Aftermarket
Compatibility
JCB 3CX, 4CX

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