600-C601 RevB_EN 7 / 15
®
Spring Adjustment
NOTE: The spring setting which holds the top housing in the up position is set at the factory and should
provide many years of use without the need of adjusting
.
After an extended period of time the top housing may not maintain its original setting, therefore the spring
tension can be adjusted by loosening and tightening the screws on the back of the unit. The detailed steps as
below:
1.
Unscrew the screws marked in circles
with screwdriver and take the cover off.
2.
Insert the screwdriver into the hole on the
collar and hold on, then using a hex wrench
(size 3/16), loosen the set screw. To tighten the
spring, turn the screwdriver at a proper angle
following the arrow.(turn in the opposite
direction to loosen the spring), then tighten
the sew screw.
3.
Put the cover back and attach the screws.
Note: to get the proper spring pretension force,
may need to repeat the operation one or several
times.
