Need your collective guidance on adjusting front wheel bearings on my '89 740 (no ABS). My Haynes manual covers 740's up to '88, and the local libraries have the Chilton from '90 to present. The procedures outlined have enough differences to prompt this request. Here's the story:
1. Haynes says that up to '87, torque to 42 ft-lbs while rotating the brake disc, loosen a half-turn, then tighten using only finger pressure (1.1 ft-lbs, more or less). This is close to what I was taught as a general procedure about 40 years ago.
2. Haynes then says that on the '88, use a new castle nut (they don't say why), torque to 74 ft-lbs, then tighten an additional 45 degrees (gut reaction says this is excessive).
3. Chilton procedure from '90 upward is the one Haynes uses for the '87 and earlier, no mention of using a new nut.
So the question is, did '89 follow the '88 procedure, did it revert to the '87 and earlier procedure, or is Haynes just wrong about the '88 models?
All comments gratefully accepted.

Tom Helm