Case 580SR Service Manual page 569

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SECTION 27 - REAR AXLE 77
Carry out the preloading measurement (P) of the
pinion taper roller bearings, using a dynamometer
380002672.
The adjustment is carried out by increasing the ring
nut torque gradually, being careful not to exceed.
Once you got the requested preloading value, caulk
the ring nut.
F28098