Crown wheel and pinion 458/20672, aftermarket

458/20672

Brand
HATVE HTV
Article
458/20672
Machine system
Transmission
Part type
Crown wheel and pinion
Machine brand
JCB
Manufacturing type
Aftermarket
Compatibility
JCB 3CX, 4CX
All the features

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Crown wheel and pinion 458/20672 is an aftermarket part for the JCB 3CX and 4CX backhoe loaders. The set's ratio is 11/37.

Crown wheel and pinion sets differ in ratio, spiral direction (right or left hand), pinion thread and mounting dimensions, so two similar-looking sets may not fit the same axle. The set is therefore chosen by part number and the tooth counts on the old set. On four-wheel-drive machines the front and rear axle ratios must match each other, since different ratios strain the driveline and wear the tyres.

Specifications

Part number	458/20672
Production type	Aftermarket
Part type	Crown wheel and pinion
System / group	Transmission
Machine make	JCB

Compatibility

According to sources, 458/20672 (458/70035) is an 11/37 (ratio 1:3.363) rear axle crown wheel and pinion used on JCB 3CX and 4CX backhoe loaders. The catalogue also has the OEM version of this part. Other parts are in Reduction gears.

Fitting

Fitting a crown wheel and pinion is precise work needing measuring tools and should be done by an experienced workshop. Pinion depth is set with shims and backlash with the differential bearing adjustment, then the tooth contact pattern is checked with marking compound. Pinion bearing preload and pinion nut torque are set to the service manual. After assembly, fill the axle with the specified oil and check for whine and heat during the first hours.

Specifications

Machine system
Transmission
Part type
Crown wheel and pinion
Machine brand
JCB
Manufacturing type
Aftermarket
Compatibility
JCB 3CX, 4CX

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