11.FINAL REDUCTION/ TRANSMISSION SYSTEM UXV 500 SECONDARY GEAR SHIMS ADJUSTMENT Set a dial gauge on the driven bevel gear as shown. Measure the backlash by turning the rear propeller shaft in each direction, reading the total backlash on the dial gauge. If the backlash is not within specification, the shim must be changed and the backlash should be rechecked until correct. Refer to the chart for appropriate shim thickness. Bevel gear backlash Standard: 0.03 - 0.15 mm (0.001 0.006 in) Drive/Driven bevel gear shims: Adjust the backlash by referring to the A: 0.6 mm (0.024 in) chart at the right and using the thickness of the removed shims ad a guide. B: 0.65 mm (0.026 in) Backlash Shim adjustment C: 0.7 mm (0.028 in) Under 0.03 mm Decrease shim D: 0.75 mm (0.03 in) (0.001 in) thickness E: 0.8 mm (0.032 in) 0.03 0.15 mm Correct (0.001 0.006 in) F: 0.85 mm (0.034 in) Over 0.15 mm Increase shim G: 0.9 mm (0.036 in) (0.006 in) thickness H: 0.95 mm (0.038 in) I: 1 mm (0.04 in) J: 1.05 mm (0.042 in) K: 1.1 mm (0.044 in) L: 1.15 mm (0.046 in) Secondary Driven Bevel Gear Shim Secondary Drive Bevel Gear Shim 11-8