Question about Garden
Having adjusted chain to 13mm above mid track on closing garage door the trolley now jolts a few times and the chain in front of trolley towards door becomes slack. After half way the chain readjusts and the tension is the same when door has closed.
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Posted on Jan 02, 2017
SOURCE: chain tension
Hi Sally, I guess you don't have the owners manual. It tells you how to adjust chain tension. If you look around near the motor side of the bar, you should see two nuts that hold a bracket tight against the bar and an adjustment screw or bolt or something to loosen or tighten the chain by moving the bar or making it longer or shorter. Adjust that so that the bar is as short as possible and put the chain back in place. Then tighten that feature till the chain is snug again and tighten the two nuts to hold the bar firmly.
Posted on Sep 11, 2008
I'm am guessing the bar is not a stock bar or was miss matched at purchase by the dealer.
Have dealer look up factory bar to see what was original and either go with that or if you already have it. ask for a new rim sprocket with 1 extra tooth. If you don't have a replacable sprocket then best bet would be to have chains custom build which usually is the same price, if they treat you right.
Remember the new sprocket MUST be the same pitch and width of your chain and bar and they do make a large and small ID also.
Last resort If not wanting to trash a new bar or change out sprocket, run a couple chains when they get loose have your dealer take out a link.
Also a stihl 20" can be a 72 drive link chain where a husky could be a 70 or other.
Everything must be matched, hard nose bar is exception.
Posted on Feb 03, 2009
SOURCE: Garage door opener (chain) motor runs in reverse. Trolley slides forward trying to close door, even though it is closed, instead of sliding toward motor to open door. Happened out of the blue - was
Loosen the chain enough that you can remove it from the sprocket. Run the opener until the sprocket turns counterclockwise and stops. With the door in the open position replace the chain. You will probably need to adjust your open and close limits per your owners manual.
Posted on May 29, 2009
The drive gear is stripped. Remove the cover and you can see it just in front of the motor. It is white nylon and the part number is 41A2817. Available from Sears or any good door opener service company. It will come with instructions.
Posted on Jun 06, 2009
The adjusting screw is usually found on the right side of the saw close to the bar, near the bottom. You will need to loosen the two nuts on the side that hold the bar tight. Loosen them until the bar lifts up and down (about 1/2") with your finger.
There should be a combination spark plug wrench and screwdriver that came with your saw. If not, use a slot screwdriverto tighten the chain while you hold the bar up with two fingers.
When adjusted properly, there should be no hanging slack in the chain when it is warm. It should rest just against the bar so that you can grasp it with gloves on and pull it toward you.
When it is tightened thusly, tighten the two side nuts while holding the bar up with two fingers. If you don't tighten the two nuts enough, it will loosen and the chain will have slack again shortly.
Remember that the hotter the chain gets, the looser it will be. Make sure your chains is getting plenty of bar oil. Never use regular motor oil.
Posted on Jun 08, 2009
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