South Dade
Extension Spring Repair in Homestead
Extension spring repair is for the long coils that stretch beside the horizontal track, common on older single-car doors. A broken one looks like a loose coil hanging or piled above the car, and the door goes heavy on that side. The safety cable running through the coil is what keeps a broken spring from flying across the garage. Color bands on the coil are not a full specification for the replacement.
A loose coil above the car
When an extension spring breaks, the coil that was stretched beside the track goes slack and often drops into a tangle above the car. The door may hang crooked, refuse to stay up, or feel far too heavy to lift. The safety cable, if it held, is the line still running through that loose coil and tied off at the track. A missing or failed safety cable is the dangerous version, with the spring able to leave the track area.
Leave the coils parked and untouched
Leave the door parked, preferably down, and do not try to stretch the broken coil back onto its pulley. Keep people away from the horizontal track, because a spring that is only partly held can still move. Do not touch the coils, the pulleys, the safety cable, or any clip that looks ready to unhook. Never grab a set screw or a torsion part thinking it will calm an extension spring.
Safety cable, pulleys, and a matched pair
Pulleys and the hooks at the door and the track are checked, because a worn pulley is often why the coil broke where it did. Color bands are noted and then checked against the door weight and travel, since the band alone does not order the part. A torsion cone and shaft kit does not convert this system, and the layout stays extension unless the whole track setup is being changed on purpose.
Stretch, travel, and why the band is only a hint
Extension springs work by stretching as the door closes, and they relax as the door opens, the opposite motion of a torsion coil on a shaft. The safety cable is a separate steel line inside the spring, anchored so a break stays on the track. Pulley diameter and how far the spring stretches are part of matching the replacement, along with the door's weight.
Older single bays and wider lots
Extension springs show up most on older single doors, the kind the older grid still has, while western two-car lots more often carry torsion on a shaft. Hot slab garages put roof heat on those side coils, and daily cycles stretch them on every close. Campbell Drive marks the older grid, and the west side of Krome is a light marker for the two-car lots. A storm slam is hard on a coil that is already notched.
Request this visit.
Call (645) 256-1794 about this door.
We answer any hour Sunday through Friday.
Saturday stays closed.
Keys Door Co is family-owned, local, and insured.
We have worked this coast for over ten years.
Common questions
What does a broken extension spring look like?
It looks like a loose coil above the car, beside the horizontal track, instead of a tight stretched spring. The door usually feels heavy or hangs uneven. The safety cable may still be visible running through the slack coil if it did its job.
Can you put a torsion spring on this door instead?
A torsion cone and shaft do not repair an extension layout. The springs, pulleys, and safety cables beside the track are the system this door uses. Changing to torsion would mean rebuilding the track arrangement, which is a different project from replacing the broken coil.
Are the painted bands enough to order a spring?
Color bands narrow the range, and length, stretch, and door weight still decide the replacement. The other spring is inspected at the same time because it has lived the same number of cycles.
Place reference: City of Homestead
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Name the street and whether the door is up, down, or stuck.
- Repairs and replacement parts
- Openers and controls
- New garage doors