Differential adjusting nut 448/05405, aftermarket

448/05405

Brand
DGR
Article
448/05405
Machine system
Transmission
Part type
Differential adjusting nut
Machine brand
JCB
Manufacturing type
Aftermarket
All the features

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Differential adjusting nut 448/05405 is an aftermarket part for the JCB 3CX and 3DX backhoe loaders.

The differential adjusting (side) nut holds the outer races of the differential side bearings in the casing and, when turned, sets both the bearing preload and the backlash between the crown wheel and pinion. If the nut's thread or locking teeth are damaged, the setting cannot be held: the differential moves axially, the backlash changes and the crown wheel and pinion become noisy. The adjusting nuts are therefore always checked during a differential or crown wheel repair.

Specifications

Part number	448/05405
Production type	Aftermarket
Part type	Differential adjusting nut
System / group	Transmission
Machine make	JCB

Compatibility

According to sources, 448/05405 is the side adjusting nut of the JCB 3CX and 3DX front axle differential. Other parts are in Reduction gears.

Fitting

The nut comes new. Lubricate its thread with clean axle oil when fitting, then set the bearing preload and backlash by measurement to the values in the service manual and lock the nut with its lock plate or pin. Check the contact pattern with marking compound and fill the axle with the specified oil. Turn the adjusting nuts on both sides in step to centre the crown wheel, since adjusting one side only overloads one of the bearings. After adjustment, check the crown wheel run-out with a dial gauge.

Specifications

Machine system
Transmission
Part type
Differential adjusting nut
Machine brand
JCB
Manufacturing type
Aftermarket

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