11
STEP #12c:
Using a pipe wrench, rotate the large nut clockwise 2 turns to pre-tension the spring. Then, lubricate
and adjust guides.
STEP #12d:
Test door operation to determine if spring balance requires adjustment. Adjust tension as needed per
the following instructions.
Spring tension can cause severe or fatal injury. To avoid injury,
repairs/ adjustments must be made by a trained door technician.
Spring tension increases as door closes. To avoid possible
Injury, door must be fully open when adjusting spring tension
.
Pipe wrench interference can prevent pawl from engaging with
ratchet gear. Always adjust tension one “CLICK” (gear tooth) at a
time. Reposition wrench for each adjustment. Failure of pawl to
engage with ratchet gear can cause severe or fatal injury.
Contact with rapidly rotating ratchet gear can cause severe or fatal
injury. If wrench slips when decreasing tension, release pawl
immediately to avoid injury. Do not secure pawl in the disengaged
position.
To Increase Spring Tension:
Move the door to the fully open position and place clamps on the guides to prevent door from closing. Using a large
pipe wrench, grip the tensioning hex plate and rotate the ratchet gear assembly in the direction indicated above until
an audible “CLICK” is heard (one gear tooth). Operate the door to determine if the spring tension increase was
sufficient. Repeat spring tension increase procedure until door is properly balanced.
To Decrease Spring Tension:
Move the door to the fully open position and place clamps on the guides to prevent door from closing. Using a large
pipe wrench, grip the tensioning hex plate and remove the spring tension force from the pawl. Grip the pawl
retention screw and pull the pawl in the direction indicated above to keep it disengaged. Slowly release spring
WARNING
WARNING
WARNING
WARNING
