hi, on our implementshed (4years old on a lifestyleblock) we have a manual high roller door that winds up using a geared chain pulley. it doesnt work freely anymore. 1 person pulls on the chain and 1 person pulls on the door using a rake to bring it down. but even using 2 people we still have to wriggle it back in forth every 700mm to bring it down. has anyone else had this problem. i think it could be the gears but nothing looks out of place. its not catching the guiderail.
favouriteseller,
Nov 11, 3:46pm
not that familiar with them, but does the ends of theshaft the door hangs off go into bearings or a bush , if bearings these could be stuffed or the bush might need some grease, or perhaps the shaft has moved and is not sitting where it is supposed to (maybe it just has a clamp arrangement on each end) have you checked the tracks the door runs in, when it goes up and down are not out of shape
zeilberg,
Nov 11, 4:29pm
over the years we had a couple of timesthat the rolled up- doorcaught on the little angled guide up the top. It looks like the roll is too big. When I had a look from the ladder I noticed that the door was loosily rolled up. If it is not rolled up tightly enough the roll gets too big and will hit that angled guide. If you push back straight, that guide up the top , in line with the rest of the guide, the door will catch the guide when it is nearly all the way down. It was working fine this morning, not this afternoon. We tried a few times to roll it down, and we realised it was stuck. When we freed it up the gears were giving us problems. Could the trying out have upset the gears !
snoopy221,
Nov 11, 4:42pm
the door was loosily rolled up
They have springs inside them. Just like the old blinds with broken springs
favouriteseller,
Nov 11, 4:47pm
hopefully someone more familiar with them will come along soon, but in the mean time the ones I have seen just have a gear on the shaft , if the door is pushed up by hand at the startinstead of using the chain, would this be how the roll becomes to big by being rolled up lose ! I think maybe something up top is not lined up properly
supernova2,
Nov 11, 5:03pm
If it is only that it is not rolled tight enought in theroy you should be able to take the slack out by pulling on the chain whilst holding the door down but I have a feeling that its not that simple.
snoopy221,
Nov 11, 5:10pm
Nope re#6 If the springy sproing springs aren't broken-and usualy the door roll has spun while fully up and lost tension. One loosens the centre shaft retainers while holding the centre shaft with a stilson or similar and retensions the springs by winding the central shaft then tightening it's retainers
supernova2,
Nov 12, 10:38am
I know thats correct with a domestic type door but do the chain drive commmercial doors have the same set up!
mm12345,
Nov 12, 12:44pm
They can be a real can of worms.The springs can break, or if a u-bolt has come a bit loose, then lose tension.If a bracket has shifted, they can "cone" as they're rolling up.If there's been any movement in the building, or the tracks have shifted, then that can cause problems. The roll "billowing out" sounds like broken spring or spring tension gone. If you try to retension the spring by loosening the u-bolts, then if the door is down, you won't be able to hold the stilson - it might break your arm or head or something else more valuable.It should be done with the door up, but wrap a tie-down tightly around the rolled up door or risk having the whole thing unravel which could be very nasty indeed.If it's a high door - you'll be working from a height, and working from a height while having to use a lot of force might be a recipe for disaster.It is a two-person job, as even when up, the force on the spring is likely to be so much that you won't be able to hold the stilson in one hand, and tighten the u-bolt with the other. So if it isn't something obvious, call an expert to fix it, and expect to pay some $$ as it will probably be a two-man job.If a spring is broken, the door will have to come down.
marte,
Nov 12, 1:10pm
Nice post mm1234,ta.
budgel,
Nov 13, 11:48am
I repaired one once where the rivets holding the door to the internal centre had come away. It exhibited the symptoms you mention.
We removed most of the bolts on one track so we could get the sides out and then back in once repaired. We used a front end loader to bring it down to floor level for repair, then having repaired it,rolled it up and tied it to keep it rolled up, put it back in position while still rolled up and fastened the U bolts to the axle good and tight. Leaving it rolled up, we then turned it in the unwind direction to tension the spring.It is hard to figure out how many turns it needs. Holding it tight we then undid the ties and lowered it, and while holding it down we got the sides back in the tracks and fastened them.
(I think ratchet tiedown straps would be good for tying, but I used ropes.)
h.e,
Nov 13, 5:35pm
i installed metalbuilt doors for a couple of years.if the door goes up easily and isnt overly heavy i doubt the sprin has broken or unwound itself as the springs main purpose is to make the door light to lift.my guess without seeing it is the slats are out of line and the door is jamming on the guides,happens quite often take one guide offwhen its down the slats should be in line
mm12345,
Nov 13, 6:28pm
Agree with above two posts, but as the door is on a chain drive, the OP might not notice the weight so much.Could be detaching from the spindles as the OP says it's billowing out, but my guess is still springs/tension.The OP reckons they've checked and it isn't the tracks.I've struck very annoying problems where it was the tracks, if not mis-aligned, then been hit by something and jamming (fixed easily once you find the problem), but again as the roll is billowing out, unless it's "coning" out at one end only, I think it's springs - or the door detached at the spindle, not tracks or alignment.Also needs to be checked that it's aligned a good distance from the wall to the centre of the U-bolts. Roller doors are b@st@rds of things when they play up.They are a necessary evil for some door heights, or where design means you cant use anything else.If they can be avoided - then avoid them.
zeilberg,
Nov 14, 6:58pm
Thanks for all above comments. we can get the door up and down but it has to be done in stages . little up ,a bit down and than up another foot,and the same to get it down again. the chain goes trough a black plastic round guide ,I think that the problem is there,the geared chain only moves only part of a circle. me might have done some damage or shifted some parts.we havent been hard on the chain just tryed firm before we realised that the roll was stuck on the guide
zeilberg,
Nov 17, 3:07pm
thanks everyone. i got my wife to have a look and she found the problem(very hard to find if i might add (: , 3 loose bolts and 2 had the nuts and washers come off completely. these bolts connected the chain guide to the gear box.
cheers
knit1,
Nov 6, 6:05am
Wondering if your available to look at a roller door in single garage please, its hard to push up :) 021 1064990
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