4. Move the indicator toward the shaft until thesensor button just touches the surface you wish tomeasure.5. Continue moving the indicator slowly towardthe shaft until the dial pointer has moved to the midpointof its travel on the dial face.6. Leave the pointer at midtravel and turn the bezeluntil the zero on the dial is aligned with the pointer.7. You can now rotate and watch the pointer to seeif it moves. The total amount the pointer moves is calledthe total indicator reading (TIR). If the shaft is straight,the pointer should remain at zero.Crankshaft End Play or Thrust ReadingsTo measure crankshaft end play or thrust, use thefollowing procedure:1. Attach the dial indicator to a convenient placenear the vibration damper.2. Position the dial indicator gauge so the contactpoint touches the front of the vibration damper andmoves the dial indicator near the midpoint of its range.3. Insert one end of a pry bar between a mainNOTE: DO NOT INSERT THE PRYBARBETWEEN THE VIBRATION DAMPER AND THEBLOCK TO MEASURE THE CRANKSHAFT ENDPLAY. You may dent the damper and render itineffective.4. Move the crankshaft toward the dial indicator.Be sure to maintain a constant pressure on the prybar.5. Set the dial indicator to zero.6. Remove the prybar and then reinsert it on theother side of the main bearing cap.7. Carefully pry the crankshaft in the oppositedirection to measure the crankshaft end play. Repeatyour measurement a minimum of two times foraccuracy.DIAL/VERNIER CALIPERThe dial/vernier caliper is used to measure the insideor outside diameter of an object. Figure 2-2 shows atypical dial/vernier caliper.Most dial/vernier calipers have a slide, slidelockscrew, thumb button, scale, dial with measuredbearing cap and a crankshaft counterweight.increments of 0.001 inch, and a bezel.Figure 2-2.—Typical dial/vernier caliper.2-2
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