Part 2: Maintenance 9. Replacing the Ball Screw Spline Unit
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(8) Pass a suitable cord or string around the Joint #4 countershaft unit near its mounting
plate. Loosen the bolts for the Joint #4 countershaft plate fastened in the step (7) and
pull the cord using a force gauge or similar tool. Fasten the Joint #4 countershaft
securely where the U2 belt is pulled at 98N (10kgf). Adjust in the range of 78N -
117N (8kgf - 12kgf).
Force gauge
(9) Pass a suitable cord or string around the Joint #4 motor near its mounting motor plate.
Loosen the bolts for the Joint #4 motor plate fastened in the step (7) and pull the cord
using a force gauge or similar tool. Fasten the Joint #4 motor plate securely where the
U1 belt is pulled at 49N (5kgf). Adjust in the range of 29N - 68N (3kgf - 7kgf).
Force gauge
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