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Section F
94 - 4
Drive Head-Assembly (cont'd)
Note: The crown wheel and pinion are matched and should
be renewed as a pair if either one is damaged or excessively
worn. The two differential housing halves are also matched.
Do not use unm at c hed halves. If req uired , fit a new
crownwheel to the differential case half, torque tighten
crownwheel retaining bolts to 166 Nm 122 lbf ft; 17 kgf m).
7
Assemble the differential gears and their spherical
washers into the bottom half housing. Fit the differential
bearing cones.
8
Position the top half housing onto the differential,
aligning the match mark letters (see Note above). Apply
JCB Threadlocker & Sealer to the threads of bolts, then
fit and torque - tighten to 56 Nm (42 lbf ft, 6 kgf m).
Check the gears for free rotation.
Fit t he p inion inner b earing c one and t he largest
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available spacer (e.g. 14.20 mm)
Note: It should be noted that the axle should be assembled
using a solid spacer. However, in the absence of the special
tools required or the correct size solid spacer it is acceptable
to fit a collapsible spacer, refer to Axles, Collapsible Spacer
Assembly.
10
Fit the pinion inner bearing cup, together with the
required thickness of shims to give correct pinion
depth, see Pinion Depth, steps 1 to 6. To ensure the
cup is fitted square, use a suitable puller assembly. Do
not use a hammer. Fit the outer bearing cup.
Insert the pinion into its bore. (Before inserting, ensure
11
that the pinion matches the crownwheel. The code
numb ers et c hed on t he p inion end fac e and t he
crownwheel perimeter should be the same.
12
Fit the pinion outer bearing cone. Do not fit the oil seal
at this stage.
9803/3280
Transmission
Rear Axle - SD80, PD70
Purchased from www.WorkshopManuals.co.uk
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Section F
94 - 4
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