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Remove the cam lock arm spring from the left side of the carriage.
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Extension spring, OD 0.123", WD 0.014", compressed length 0.34"
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This spring pulls the arms against cams fixed to the digit shafts so that the digit shafts will not rotate when the zero-setting mechanism is not operating. It is important that the digit shafts themselves not rotate, since each digit wheel needs to be able to rotate freely on the shaft.
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