I just replaced my fan clutch/fluid coupler on my 1997 LX450 last night. I didn't remove the double belts as recommended in the Haynes manual (don't worry I have the FSM as well), is that a problem? Any ideas why it would be necessary to remove belts for this procedure? Of course the belts did loosen up when the fan clutch was removed as the pulley moved forward, but tightened up just fine when the new fan clutch was in place. The FSM doesn't provide the procedure for just the fan clutch replacement, but addresses it in the procedure for replacing water pump. Of course replacing the water pump would require removing the belts. The replacement went fairly smoothly and the fan seems to be working the way that Toyota intended it to work now.