UNIVERSAL JOINT PHASING

TM-5-3820-256-24-4 Drilling System Well Rotary Truck Mounted Air Transportable 600 Feet Capacity Model LP-12 NSN 3820-01-246-4276 Manual
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SERVICE MANUAL INSTALLATION Fig. 40 1 Transmission 2 Axle Fig. 41 1 Transmission 2 Axle Fig. 42 UNIVERSAL JOINT PHASING (See Fig. 37) When U-joints or yokes are assembled to their shafts in the same plane, they are in phase. When they are assembled to the shaft in different planes, they are out of phase. To obtain vibration free operation, check the following. 1. Yokes or flanges between the main and auxiliary transmission must be "In Phase". 2. In the case of a two-piece driveshaft assembly, between the transmission (Main or Auxiliary) and the forward rear axle, the joints on this shaft should be assembled "In Phase", unless otherwise specified by the manufacturer of the vehicle. 3. The inter-axle driveshaft yokes must be "In Phase". 4. If a vehicle has driveshafts that do not have intersecting angles but parallel angles throughout the drive line system, the yokes or flanges must be held parallel to within 1 deg. of each other. CTS-4017 - Page 21 PRINTED IN UNITED STATES OF AMERICA SERVICE MANUAL

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