In this step you might need to reach for a pair of pliers if there s too much slack on the cable.
Garage door chain tight one side loose other.
Tightening your garage door chain is a simple matter of turning the right nut.
Adjust the cable bracket.
The trolley is responsible for pushing or pulling the opener arm along the chain so as to open and close the garage door.
Posted on may 21 2020 by bandi ruma.
The one you re looking for is attached to a bolt found at the spot where the trolley or carriage connects to the rail.
Use the pliers to loosen the bracket holding the wire to the hook that s attached to the frame pulling the cable wiring through the bracket in order to tighten it.
Use your pliers to loosen the bracket pull excess cable through the bracket and re tighten.
Garage doors with a single tension spring located over the center of the door are difficult and potentially dangerous to repair.