ELBOW 0037020 - Caterpillar

(7) Use nest (8) from the 6V6030 Setting Fixture Group to calibrate the 6V6000 Dial Bore Gauge. Nest (8) has a diameter range of 30.0 to 50.8 mm (1.181" to 2.000"). Put nest (8) in position on the setting fixture group as shown. Make sure the spindle lock is not engaged. Turn micrometer spindle (9) counterclockwise to a point approximately 0.5 mm (0.020") more than the size being set.(8) Carefully put gauge (1) in nest (8) with the gauge point toward the micrometer spindle and keyway (10) in alignment with key (11) in the nest. Turn spindle (9) in toward the gauge until the micrometer reads the exact size being set. Tighten the spindle lock. The spindle should now be in contact with the gauge point. IMPORTANT: Always set the micrometer by turning the spindle toward the gauge. If the spindle is turned in past the desired setting, turn the spindle out and then back in again to the correct setting.(9) Twist nest (8) in the horizontal plane until indicator hand (12) shows the minimum or "most minus (-)" reading. The indicator hand should be within approximately 30° of the 12 o'clock position on the dial. If it is not, use the quick setting wrench to adjust the position of the gauge point as shown in step 6 on page 7.(10) If the indicator hand is within 30° of the 12 o'clock position, loosen screw (13) and move the dial so the zero on the scale is in alignment with the indicator hand. Tighten screw (13). Check to make sure the gauge has not moved during this setting. If the gauge has not moved, it is now set to size. If the gauge has moved, again follow steps 9 and 10.Adjusting The Centralizer Points
For maximum accuracy, the centralizer points must be in firm contact with the wall of the bore being measured. Use the following procedure to adjust the centralizer points.(1)