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Installation And Assembly
Counterbalancing of Lower Instrument Arm
WARNING: THE LOWER INSTRUMENT ARM CAN RISE ABRUPTLY IF THE LOCK RELEASE LEVER IS
PRESSED WHEN THE ARM IS IN THE DOWN POSITION AND IS NOT BALANCED. DO NOT LEAVE
THE ARM IN THE DOWN POSITION WITHOUT AN INSTRUMENT INSTALLED ON THE ARM OR
ACCIDENTAL MOVEMENT OF THE ARM MAY OCCUR, POTENTIALLY CAUSING INJURY.
The counterbalance mechanism on the lower instrument arm is a compression spring.
The counterbalance is factory set to 30 lbs. Use the hex wrench provided to adjust the tension on the
compression spring.
Counterbalancing of Refractor Arm
WARNING: THE REFRACTOR ARM CAN RISE ABRUPTLY IF THE LOCKING HANDLE IS RELEASED, WHEN
THE ARM HAS BEEN LEFT IN A DOWNWARD POSITION, AND IT HAS NOT BEEN BALANCED.
DO NOT LOCK THE ARM IN THE LOWER POSITION WITHOUT A REFRACTOR INSTALLED OR
ACCIDENTAL MOVEMENT OF THE ARM MAY OCCUR, POTENTIALLY CAUSING INJURY.
The counterbalance mechanism on the refractor arm is a compression spring. The counterbalance
is factory set to 10 lbs. Adjust the tension on the spring by using a flat head screwdriver.
18
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Endurance Tilt Chair and Stand User's Guide 15250-101 REV-A
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