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8-18 2. Recheck both offset and parallelism to ensure accuracy and make further adjustments as necessary. NOTE: After parallelism and offset have been DRIVE BELT DEFLECTION Drive belt length, condition, and deflection are all important for peak performance. To check and adjust drive belt deflection, use the following procedure. 1. Turn the engine off; then open the belt guard. 2. Make sure the drive belt is sitting at the top of the driven pulley sheaves. 3. Place a straightedge on top of the drive belt. The straightedge should reach from the drive clutch to the top of the driven pulley. 4. Using a stiff ruler centered between the drive clutch and driven pulley, push down on the drive belt just enough to remove all slack. Note the amount of deflection on the ruler at the bottom of the straightedge. The deflection should be within the range of 25-31 mm (1-1 1/4 in.). NOTE: Push down on the belt with the ruler only 5. To correct drive belt deflection, washers can be removed or added between the stationary and movable sheaves of the driven pulley. NOTE: If the drive belt deflection is above speci- 6. Secure the belt guard. |