Lift the rear of the vehicle by placing the jack in correspondence of the first transversal frame beam, behind the gear box, and add two stands one at each rear frame extremity.

To detach the rear wheel hydraulic brake tube; unscrew the two hexagonal unions connecting the tubes with the shoes brake cylinder (10 mm spanner), release the clips fixing tubes to the rear axle, loosen the nut fixing the three way union to its support (14 mm spanner) remove the three way union, de­tach the tubes from the axle.

To detach the hand brake controls: unscrew the screws fixing the cable trunnion screws (8 mm spanner) and detach the cables.

To detach the rear axle from the frame: open the front transmission coupling hose rear clip, drain oil from differential, pull out the split pins of the spring pins and with 17 mm spanner unscrew the nuts fixing the pins. With the proper punch ease first the front and then the rear spring link pins (Fig. 31). Note : Between the rear links and the springs two bronze washers are inserted. Remove the rear axle complete with wheels and springs, sliding the transmission shaft from the splined sleeve at the gear box end (Fig 31 bis)

To remove the rear wheels: unscrew the four dome nuts on each wheel (14 mm spanner) fixing rims to the hubs and remove the wheels from the hubs, (Do not unscrew the other four nuts).

To dismantle the rear hubs: unscrew the six screws ( 11 mm spanner) locking the hub driving flange, and using two of the screws as extractors, screwing them into the two threaded holes, remove the hub flange, remove the gasket, straighten the tab washer locking the centering, withdraw the layshafts and then with the lock ring spanner unscrew the centering, remove the washers and with the same spanner remove the lock ring, fit tool 53289, fixing it with 3 screws to the hub and withdraw the hub with its bearings (Fig. 33).

To remove the brake shoes: open up shoes from the hand brake cam side, turn them 90degrees so as to bring them perpendicular to the back plate and remove them.

To remove the Back Plate : unscrew the four nuts (14 mm spanner) fixing the back plate to the flange on the axle arm, remove the washers and then the back plate (Fig. 34).

To remove the rear springs: unscrew the four nuts (14 mm spanner) of the two U clamps fixing the springs to the axle, remove the washers, the U clamps and then each spring,

To remove the transmission shaft: unscrew the three nuts ( 14 mm spanner) on the rear yoke arm, re­move the washers and the bolts, detach the coupling with the transmission shaft.

Take care of the rubber dust ring of the centering guide.

To remove the differential : straighten the tab washers of the bolts fixing the arms to the differential box, unscrew 4 screws and 4 nuts (10 mm spanner) from the right hand side of the box, remove the right hand arm of the box by tapping with the mallet on the flange holding the back plate or the rear spring attachment, moving it axially. (Fig. 35 & 36).

Afterwards unscrew the four screws (10 mm spanner) on the left hand side, remove the screws and remove the rear axle box from the left hand arm (Fig. 37) then extract the differential complete with crown wheel and satellites.

Take care of the arms and axle box.

To remove the pinion : open up the tab washers, unscrew the 4 bolts (10 mm spanner) fixing the pinion bearing bush to the differential box and tapping the pinion through the box now without the crown wheel and satellites, extract it from its seats. Holding the coupling yoke arm, unscrew the nut locking the yoke arm (19 mm spanner) remove the washers, withdraw the yoke arm and by tapping, push out the pinion.

To remove the satellites and planetaries: remove the split pin of the satellite support pin, remove the washers, the satellite pin and by rotating the planetaries, remove the two satellites. By moving them towards the centre of the box, remove both the two planetaries. Take care of the shims. (Fig. 38).

To reassemble the planetary and satellite gears: refit with the interposing of the shims 40330228, the planetary gears into the satellite support box. Mesh in a diametrically opposite position the sa­tellites. Rotate the group so that the holes in the satellites come to coincide with the holes on the box, then introduce from the outside of the box, the satellite holding pin, fix it with washers and split pin.

Check the play between the teeth of the planetary and satellites (about 0.1 mm), otherwise substitute the shims 40330228 with others of appropriate thick­ness. (0.4 - 0.5 - 0.6 - 0.8).

To refit the pinion slide on to the pinion shaft the shims 41042009 and insert the pinion shaft into the bearings and distance piece fitted in the bush, then slide the yoke arm on to the splined end of the pinion; complete with dust protector ( 41044002 ) and interposing the washer, fix the shaft by tigh­tening the nut (19 mm spanner). When fitting the yoke arm be careful with the oil seal. Insert the pinion group and bush with gasket 18330208, into the differential box and tighten the four bolts.

To refit the differential; assemble the differential box with the crown wheel on to the left hand axle arm (short) taking care of the shims between box and bearing. Normally it is sufficient to fit one shim of 1.95 mm No. 410420141 control the parallelism between crown wheel and arm flange.

Fit on to the left hand arm the differenlial box, complete with pinion and carry out the adjustment of the bevel pair as laid down previously (see page 56).

When fitting the differential box to the arm, ensure its correct placing. The plate for anchoring the leaf spring to the arm should be in a position diametrically opposite to the drain plug on the box.

The bolts fixing the arm flange to the box must have tab washers fitted even if originally spring washers were fitted.

To reassemble the right and axle arm

Apply the arm to the box, taking care to fit the shim between box and bearing and to the gasket between the arm flange and axle box.

As said beforehand, it is necessary to adjust the thickness of the gasket between flange and differential box, so that the play in the box between the two support bearings be the least possible (it should not be higher than 0.1 mm) without however causing interference which could be dangerous to the bearings due to excessive axial load.