Fluid Flywheel - To remove and refit from BUT manual

(refer to pictures: section through A-type or L-type, exploded view of L-type, and part cut away.)

To Remove

  1. Drain the fluid coupling.
  2. Disconnect the freewheel unit at the joint flange at the rear of the fluid coupling.
  3. Remove setscrews from around the outer edge of the flywheel rim.
  4. Withdraw the runner shaft together with the rear casing and runner. Holes, tapped 3/8in. BSF are provided for jacking screws. The inner race and rollers of the spigot bearing will be withdrawn with the runner shaft and the bearing outer race will remain within the flywheel bore. It is advisable to place a suitable receptacle beneath the fluid coupling before carrying out the above instruction, as a quantity of oil still remains in the coupling after draining.
  5. Remove the circlip from the end of the runner shaft and withdraw the inner race and rollers of the spigot bearing using suitable pliers and extractor.
  6. Remove the nuts from the bolts securing the flywheel to the crankshaft flange and lift off the flywheel.
  7. Remove the outer race of the spigot bearing from the flywheel bore. On the L-type engine, however, this outer race is located within its own housing, which in turn is setscrewed to the flywheel.

To Fit

Reverse the procedure for removal, noting the following points:

  1. Ensure that a paper joint and sufficient non-hardening compound is used on the joint between the rear casing and the flywheel so that a perfectly oil-tight seal is obtained.
  2. Refit the fluid coupling with oil as described in Lubrication.