Rear Transmission Components - Fiat 411 R Service Manual

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Fig. $59. - Rear iransmission components.
1. Differential loci. - 2. Power take-off driving gear - Ra. Bevel pinion roller-bearing adjustment shims - Rb. Ring for centering
bevel pinion on ring gear ~ Re, Ring gear adjustment shims.
Unscrew the beve! pinion shaft fastening nut using
wrenches A 711109 and A 611108 and stopping
the rotation with the brass hammer A B61322.
Remove the shaft by applying a bronze punch upon
ifs front end, and hammer it out.
The power £ake~ofi' driven gear and the spacer are
removed from the casing upper opening after setting
ihe power taI<e»off engagement lever in the position
marked << CAMBIO » (gearbox).
The bevel pinion.
inspection of the stripped components of the differential casing and differential lock.
Accurately clean all stripped out components and check if the gear meshing surfaces are in good con-
clitionsi
»— check the diiferentiai gear thrust rings, and the pinion bushes and thrust bearings vs. ihe wear limits
oi page 59. When replacing bushes, after assembly, ream with expanding blade {earner U 6'lf814
to achieve the prescribed clearance;
-— check the copper lining on crown wheel hubs. and replace such parts if the coating is not sufficient;
- check the taper roller bearing and the differential axles oil seals;
— check the difierenfial lock collar working suriace and the pin fastening. Check the differential lock
control spring (Fig. 107) by a comparison of its characteristics with {he specifications on page 69.
D iffereniial casing asse mbiy.
See Figs.1H9 and 118 and in addition bear in mind ihatz
- the planetary casing is secured to the be-vei gear by bolts fastened to a torque of 4.5 to 5 kgm (32 to
36 it.lb);
—~ the differential. pinion axle is held in place by two special head bolts, the same which secure the
casing is the bevel ring gear;
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