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8-31 8 CORRECTING OFFSET 1. To correct offset, the driven pulley must be moved laterally on the output shaft. Remove the cap screw and washers securing the driven pul- ley; then remove the driven pulley. NOTE: If the driven pulley is tight on the input 2. To move the driven pulley inward on the shaft, remove washer(s) as required from behind the pulley. 3. To move the driven pulley outward on the shaft, add alignment washer(s) as required behind the driven pulley. 4. Install the driven pulley and secure with a cap screw and washers. Tighten the cap screw to specifications. CHECKING PARALLELISM 1. Check parallelism of the drive clutch/driven pul- ley using the alignment bar and reference points X and Y with the alignment bar placed between the sheaves of the driven pulley. Using a cali- pers or a machinist’s scale, measure X and Y from the back side of the alignment bar. Mea- surement Y must be 1.5 mm ± 1.0 mm (0.060 in. ± 0.040 in.) more than measurement X, but Y must not exceed measurement X by more than 2.54 mm (0.100 in.). 0742-065 NOTE: The offset must be correct before check- 2. If parallelism is not within specifications, the parallelism must be corrected. 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 proce- dure. 1. Turn the engine off; then open the access panel. 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 at 31 mm (1 1/4 in.). 741-464A NOTE: Push down on the belt with the ruler only 5. To correct drive belt deflection, remove the sheave adjuster from the pulley, remove or add shim washers to the adjuster, and install the adjuster. NOTE: Adding shim washers will decrease belt NOTE: If the drive belt deflection is above speci- 6. Close the access panel. ! CAUTION Do not allow the driven pulley to “float” on the out- |