Garage Door Extension Springs 25" X 42" for 7' High Doors, Pair

Replace extension springs for a 7 foot overhead door with these spring pairs from North Shore Commercial Door. Extension Springs make opening and closing a 7 Foot tall garage door easier and safer by acting as heavy duty counterweights. The springs install with an S-Hook to the stationary brackets that hang the horizontal tracks from the ceiling, while the other end of the spring is connected to a pulley and safety cable assembly installed on the garage door. As the torsion springs close the door, extension springs extend, lightening the load of the door. As the door opens the springs retract to help the operator pull the door upwards. When in the open position, the initial spring tension holds the door in place on the horizontal tracks. Garage Door Extension Springs are color coded by door weights ranging from 40 pound doors to 380 pound doors.

Product Highlights:
    •    Replacement springs for garage door repair and home improvement on 7 ft. high doors
    •    Extension spring systems require two springs; SOLD IN PAIRS
    •    Counterbalances the weight of a garage door
    •    Makes it easier for the garage door opener to close and open the door
    •    High quality new springs to replace old springs
    •    Springs extend as the door closes, retract as the door opens
    •    Uses a sheave, pulley, and garage door cable assembly to transfer the weight of the door to springs
    •    Spring manufacturers color code by weight to ensure the correct spring
    •    Door weights ranging from 40 lbs to 380 lbs

Determine the door weight and door height:

1. The pull weight of an extension spring is determined by the color code found on the end of the spring.

2. Measure door the height.

3.Springs are only sold in pairs. If you cannot determine the color code, it will be necessary to weigh the door.

To Weigh Your Door:

1. Raise door completely. Disconnect power and lifting arm of garage door opener.

2. Fasten "C" clamps or vice grips under bottom rollers to retain door. With tension completely off extension springs, disconnect springs from track support.

3. Remove "C" clamps or vice grips and lower door by hand. Note that entire weight of door, which could exceed several hundred pounds, has to be lowered slowly by hand so more than one person is needed.

4. Set bathroom scale to zero and place under center of door and record door weight. 5. If door weight exceeds capacity of the scale, use 2 bathroom scales. Add a 2 x 4 with one end on one scale and the other on a second scale with the door perpendicular to the 2 x 4. Add the respective weight from each scale together to get the total weight of the garage door.

DASMA Spring Color Codes: EXTENSION SPRINGS:
    •    40 lbs - BLUE
    •    50 lbs - RED
    •    60 lbs - BROWN
    •    70 lbs - ORANGE
    •    80 lbs - GOLD
    •    90 lbs - LIGHT BLUE
    •    100 lbs - TAN
    •    110 lbs - WHITE
    •    120 lbs - GREEN
    •    130 lbs - YELLOW
    •    140 lbs - BLUE
    •    150 lbs - RED
    •    160 lbs - BROWN
    •    170 lbs - ORANGE
    •    180 lbs - GOLD
    •    190 lbs - LIGHT BLUE
    •    200 lbs - TAN
    •    210 lbs - WHITE
    •    220 lbs - GREEN
    •    230 lbs - YELLOW
    •    240 lbs - BLUE
    •    250 lbs - RED
    •    260 lbs - BROWN
    •    270 lbs - ORANGE
    •    280 lbs - GOLD
    •    290 lbs - LIGHT BLUE
    •    300 lbs - TAN