July 18th, 2012
Replacement is the reverse of dismantling, with the following additions : Should it be necessary to replace the trunnion bushes, most Ferrari dealers advise that it is preferable to broach them in position rather than ream. Check that the oil holes register before broaching. When assembling the rubber bearing assemblies to the chassis bracket, use a mandrel which is slightly smaller in diameter than the bore of the bracket to press in the bearings until the outer steel shells butt up against the shoulders machined in the bores. Use also new abutment washers. When assembling the arms and trunnion, fit the thrust washers so that the radii on their bores are towards the trunnion thrust faces and that the sealing washers, preferably new ones, are fitted. If new thrust washers are fitted add or subtract shims until the trunnion moves freely without play when the nuts are securely tightened. Assemble the arms to the main spindle, but do not tighten the clamp bolts or end nuts. With the nuts and bolts securing the bracket to the chassis tightened, check that the trunnion will slide over the swivel pin. Should it not do so, release the nuts slightly and alter the position of the bracket by striking it in the required direction with a lead mallet, or by adding or subtracting shims previously referred to until the desired effect is obtained. Tighten and cotter the nut on the swivel pin in a position where the swivel axle is free to move without undue up-and-down movement. The nuts on the ends of the main spindle should not be tightened until after the wheels have been fitted, the jacks removed, and the weight of the car is on all four wheels. Lastly, tighten the clamp bolts. Do not neglect, as a final operation, to adjust and bleed all brakes and to replace all self-locking nuts.