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H. Removal and Replacement of Spring Unit
1) Remove the handle. WARNING! To reduce the risk of injury, follow the
instructions in “IV.F. Removal and Replacement of Handle.”
2) Remove the frame covers.
3) Loosen the spring unit mounting screws, and remove the operation panel.
4) Remove the spring unit mounting screws, and lift off the spring units.
5) To replace, reverse the above procedure.
6) Adjust the door opening/closing force. See “IV.J. Adjustment of Door Opening/Closing
Force.”
I. Removal and Replacement of Spring
1) Remove the spring units. See “IV.H. Removal and Replacement of Spring Unit.”
2) Remove the U-nut.
3) Use a fl at blade screwdriver to turn the spring rod end in the direction for stretching
the spring. When the screwdriver cannot turn any more, use a wrench (#8) to turn the
spring rod in the same direction as above to remove the arm.
4) Remove the casing shaft, and take the spring out of the spring casing.
5) To replace, reverse the above procedure.