DoorKing Dual Swing Gate — Gearbox Rebuild
0:23Filmed on the job by Shield Gate Repair
What this video shows
A DoorKing dual swing installation with a failing gearbox. Shows the strip-down, what worn gearing actually looks like against a healthy set, and the rebuild — an operator most companies would have quoted for outright replacement.
The fault
- A DoorKing dual swing gate operator at a residential entrance had stopped working correctly. Dual swing installations are less forgiving than single-leaf gates: both leaves have to move together, so a fault on one side shows up as the whole entrance misbehaving rather than as one obviously broken half.
How it was diagnosed
- The fault was in the gearbox, which sounds terminal and is the point at which diagnosis often stops and quoting begins.
- It is rarely terminal. A DoorKing operator is built to be serviced, and a gearbox is a serviceable assembly rather than a sealed unit you throw away with the motor and the control board still working perfectly.
The fix
- We repaired the gearbox and carried out a full service on the whole unit rather than only the part that had failed. On a dual swing installation that matters: the two sides share the load, and leaving one half unserviced means the next failure is already scheduled.
- The customer received a three-year warranty on the work.
A failed gearbox is the point where most quotes turn into a replacement operator. It is worth asking whether the gearbox itself was diagnosed, or whether it was simply the most expensive-sounding part in an estimate — because on a DoorKing unit it is a repairable assembly, and repairing it leaves a working motor and control board exactly where they are.
More repair videos
All 33 videos- All-O-Matic Slide Operator — Drive and Clutch Service
0:17 - All-O-Matic Operator — Chain, Sprocket and Limit Check
0:27 - All-O-Matic Gate Operator Repair — Clutch and Limit Adjustment
0:13 - All-O-Matic Slide Operator — Chain and Drive Inspection
0:17 - Finding a Safety Sensor Fault on an Automatic Gate (Video)
0:13 - One Automatic Gate Fault, Diagnosed and Fixed (Video)
0:47
Gate Not Working Right Now?
We answer the phone 24/7. If you are stuck, call and we will talk you through the manual release before anyone arrives. See what counts as a gate emergency.