Wheel bearing adjustment

Wheel bearing adjustment

To ensure a long bearing life due to correct initial adjustment the ballbearings should be preloaded and to do this proceed as follows:

1. Tighten the wheel shaft nut gradually so that the rotation torque does not exceed .36 lb ft.
2. To check the rotation torque install Fiat tool A.95697/2 on the wheel drum and insert the shank 2 (see FIG 7:5) of dynomometer A.95697 in the support and securely hold the lever 3. Move the needle 5 to register .36 lb ft on the dynomometer scale as shown in FIG 7:5 and using the operating lever 6 rotate the dynomometer and the wheel shaft some turns in a clockwise direction. During rotation check that the needle 5 does not exceed the setting index 4. Should the rotation torque prove to exceed .36 lb ft, this will indicate a high bearing preload. To reset remove the wheel shaft and fit a new resilient spacer. Repeat the rotation torque test.

Swinging arm adjustment

To adjust the swinging arm use Fiat fixture A.66064 as shown in FIG 7:3 and proceed as follows:

1. At points A and B as indicated in FIG 7:4 between the 'estendblock' and the swinging arm to body front mounting bracket fit three shims on each side. To ensure that the shims are correctly centred use Fiat alignment bar A.66057.
2. Whilst removing the alignment bar, carefully slip in the mounting pin and screw on the nut. Once the rear wheel geometry adjustment has been completed this nut should be tightened to a torque wrench setting of 43.4 to 50.6 lb ft.
3. At points C and D (see FIG 7:4), insert the number of shims required to fill in the gap between the 'estendblock' and the two fixture shoulders. Having determined the number of shims required both at locations C and D, these must later be fitted between the 'estendblock' and the shoulders on the swinging arm to body mounting bracket.