Rear large barn door had a noise/squeak in the tension arm slide.
Not the locking arm on the bottom of door.
The arm slips through the middle of a small rectangular block housed inside the door cavity.
Within the box are opposing springs with a nylon block and a roller bearing each side of the arm.
The spring & bearings apply pressure to the arm to slow door movement etc.
I disassembled it to find----
Trouble is the bearing is only mild steel, in-turn it can stop turning and then flat spot against the arm.
The flat spot grabs on the arm when you open/close the door creating squeak/chattery noise.
Disassemble, replace bearing with a offcut from a tensile bolt shaft.
Clean, re-grease, reassemble, Good to go , no more squeak.
In hindsight next bearings you replace from another job keep some needles you never know when ya might need 1.
Bearing is 7mm dia x 16 mm long.
Reply With Quote
