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9. Install a screw clamp at position (1). 10. Start engine and check vibration. If there is little or no change move the clamp to the next posi- NOTE: If there is no difference in vibration at this 11. If vibration decreased, install a second clamp (1) and repeat the test. 12. If additional clamp causes an additional vibration, separate the clamps 1/2 inch (1) above and below 13. Increase distance between the clamp screws (1) (2) and repeat test, until the least amount of vibra- 14. If vibration remains unacceptable, repeat the pro- cedure to the front end of the propeller shaft. 15. Install wheels and lower vehicle. PROPELLER SHAFT RUNOUT 1. Clean propeller shaft surface, where dial indicator will contact the shaft. 2. Install dial indicator perpendicular to the shaft surface. 3. Measure runout at the center and ends of the shaft away from weld areas, so weld process does not affect measurements. 4. Refer to Runout Specifications chart. 5. If runout is out of specification, index the shaft 180° and take shaft runout measurements again. 6. If runout is now within specifications, mark shaft and yokes for proper orientation. 7. If runout is not within specifications, verify runout of the transmission/transfer case and axle are within specifi- cations. Correct as necessary and measure propeller shaft runout again. 8. Replace propeller shaft if the runout still exceeds the limits. HB PROPELLER SHAFT 3 - 3 |