1)
Raise the door to relieve all tension and block the door open as
described in "Test and adjust the tension". If you haven't already done
so, move your car out of the garage.
2) Disconnect the safety-cable springs from the track support at the
rear of the garage. The cable is usually bolted, so you'll use a wrench
to disconnect it; the springs may be attached to a hook or equipped
with brackets bolted to the track support.
3) With one person on each side, raise the door a bit to remove the
stop blocks and lower it to the floor. Garage doors can weigh hundreds
of pounds, so work with a helper. Lift the door and insert a bathroom
scale under the center of the door, then lower the door onto the scale.
4) If the door's weight exceeds the capacity of your scale, place the
scale inside the door and rest a 2-by-4 on the scale and on a block of
wood outside the door. Lower the door onto the 2-by-4 and double the
weight measurement to determine the required spring capacity.
Check the measurements of both springs making sure they are a matched pair.
QUESTIONS ?
CALL US TOLL FREE 800-997-7606
EXAMPLE:
If your garage door weighs 250lbs - You would require a pair of 250lb extension springs. If your door weighs 125 lbs - Then we suggest you get a pair of 130lb extension springs.
If you have any doubts about your measurement or size please call us so we can further help you.
