I have a garage roll up door, commercial size. The pull chain used to roll up the door has suddenly stopped rolling up the door. The roller used to bring the door up and down just spins on the chain side but no motion on the opposite side. The shaft rolls freely In both directions. Any idea what will be needed to repair the door?
Roll up door problems
- Thread starter JW-1
- Start date
dcg9381
Well-known member
There is likely a keyway or "bolt" that locks the roller gears to the shaft on the roll up door main shaft. It's likely the "lock nut" on the shaft to the main roll shaft.
Codyboy
Well-known member
On my 2000 series Janus door the axle is a dead axle (does not move). The drum is what spins and is on bearings.
On the reduced chain drive there is a ring gear bolted to the drum.
There is a metal gear box mounted to the on the end of the angle bracket. This metal box contains to chain roller which turns a small gear that engages the large ring gear on the drum.
There is probably a pin , shear pin maybe idk.
but if the chain is rolling then it seems it would have to be the small gear is not turning.
I would also check the alignment of the gear box and the gears where they mesh together.
If misaligned it will not engage the ring gear.
On mine the small gear box is not really adjustable though.
I will say that if the angle bracket is bent away from the drum the gear box will move away from the ring gear and not make contact.
Hard to explain. Can you take pictures?
On the reduced chain drive there is a ring gear bolted to the drum.
There is a metal gear box mounted to the on the end of the angle bracket. This metal box contains to chain roller which turns a small gear that engages the large ring gear on the drum.
There is probably a pin , shear pin maybe idk.
but if the chain is rolling then it seems it would have to be the small gear is not turning.
I would also check the alignment of the gear box and the gears where they mesh together.
If misaligned it will not engage the ring gear.
On mine the small gear box is not really adjustable though.
I will say that if the angle bracket is bent away from the drum the gear box will move away from the ring gear and not make contact.
Hard to explain. Can you take pictures?
Attachments
Codyboy
Well-known member
Update. My brother and I got the door up but couldn’t find any connection between the chain and the drive. We’re thinking about dropping the door and unrolling it to expose the internals.
Where would you find the parts for these doors if we actually need to replace anything?
Where would you find the parts for these doors if we actually need to replace anything?
I have 2 videos of the door but can’t upload them. if I knew what format they needed I could convert them. I’ll be looking again tomorrow to see if there is any pin.
dcg9381
Well-known member
Wanna share? I just typed a paragraph on this, but you can keep us all in suspense instead of telling me I'm wrong.
FYI, I'm in the middle of replacing a roll up door (10x14') with a panel door, that's how bad they ****... Especially after you hit them with the top of a truck camper.
Codyboy
Well-known member
I see that is not nearly the same as what I have.
Appears you have a live axle door
I notice that the red tensioner has a set screw missing, hard to see in the video.
I'm guessing the red tensioner is bolted the the door drum but with the missing set screw it is no longer turning with the axle?
Appears you have a live axle door
I notice that the red tensioner has a set screw missing, hard to see in the video.
I'm guessing the red tensioner is bolted the the door drum but with the missing set screw it is no longer turning with the axle?
Codyboy
Well-known member
I would suspect that a panel door would **** also if you smash into it with a camper.Wanna share? I just typed a paragraph on this, but you can keep us all in suspense instead of telling me I'm wrong.
FYI, I'm in the middle of replacing a roll up door (10x14') with a panel door, that's how bad they ****... Especially after you hit them with the top of a truck camper.
Lol
dcg9381
Well-known member
True. But the roll up door rattle like crazy, difficult to seal. Not a fan.
Sorry I meant I figured out how to post a video. SorryWanna share? I just typed a paragraph on this, but you can keep us all in suspense instead of telling me I'm wrong.
FYI, I'm in the middle of replacing a roll up door (10x14') with a panel door, that's how bad they ****... Especially after you hit them with the top of a truck camper.
Peter 212
Member
Sounds like the spring has detached from the drum on the non-chain side, or the coupling broke inside the curtain. You need to look inside the barrel near the end plate on the side that isn't moving. If the chain side is spinning the shaft but the door isn't moving, the connection between the shaft and the door curtain is gone.
Any chance I could get a photo or video on a repair like this one?
58Yeoman
Well-known member
Part of my job before retiring was to fill rail cars with powdered pvc resin, then pull them out and park them on the side tracks. These side tracks were higher than the 'silo area' where we filled the cars. One co-worker was a smart *** that wouldn't do his job, or back me up on mine when he was supposed to. He eventually took over my job when I transferred to the tank farm. Well, Steve loaded some rail cars, then pushed them up the incline and parked them, but didn't set the hand brakes. He never set the brakes, because he never liked getting out of the trackmobile to release the brakes when he moved the cars by himself, which he wasn't supposed to do. We were always supposed to have a brakeman.Wanna share? I just typed a paragraph on this, but you can keep us all in suspense instead of telling me I'm wrong.
FYI, I'm in the middle of replacing a roll up door (10x14') with a panel door, that's how bad they ****... Especially after you hit them with the top of a truck camper.
We came back one Monday to find one of the railcars had come down the incline and went through one of those roll up doors, totally demolishing it. My d*ckhead boss couldn't cover for Steve any longer and had to tell him to retire early or be fired. That door had to be twenty footer at least.