TM 10-3930-659-20 5-37. FAN BELT MAINTENANCE (Con't). c. ADJUSTMENT NOTE If fan belts were not replaced, bolts must be loosened. 1. Press down on two fan belts (1) with thumb and adjust position of alternator (2) until fan belts deflect no more than 0.5 in.  (12.7 mm). 2. Tighten bolts (3 and 4). FOLLOW-ON TASKS: • Close right and left engine upper sideshields (see TM 10-3930-659-10). • Install conveyorized fork attachments on side of forklift truck (see paragraph 17-13). TA706921 5-108