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replacing pivot gear in vinyl double hung window

replacing pivot gear in vinyl double hung window

Old 04-27-08, 02:11 PM
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replacing pivot gear in vinyl double hung window

How do you get the 2" wide gear into the 3/4" opening?
Old 04-27-08, 04:08 PM
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I'm guessing you're talking about replacing the pivot shoe assembly (which is roughly 2" long, 1 3/8" wide, and 1/2" thick) on a single or double hung window, the piece that holds the pivots of the window when you tip it in, and which slides up and down in the side tracks of the window as you raise and lower it. When the windows are assembled in the factory, these pieces are slid into the side extrusions prior to the window being welded together. This makes them practically impossible to remove and replace when they become damaged or break. But it can be done. Unfortunately, it will involve cutting into the window which means the window won't be just like new once you're done. It's kind of like doing surgery on the window... there will be a scar that may or may not be visible.

On many vinyl windows, there is a cap at the top of the side track that needs to be removed. On others, it is a long sprial balance cover that needs to be pryed out along the side. Once the cap or cover is removed, you have to slice out a section of the vinyl frame with a sharp utility knife, making an opening so that the pivot shoe assembly can be raised clear to the VERY TOP of the window where one side can then be pryed out. If the window is equipped with spiral balances, you'd need to disconnect the spiral balance with the proper tool... unwind it which releases the tension, and then unscrew the spiral balance from the side of the window. Set it aside for later. The pivot shoe assembly would then be removed as mentioned earlier... sliding it to the top and prying it out.

The new pivot shoe assembly is snapped in at the top of the window, lowered into place, and is then locked into place with a quarter turn using a wide flat screwdriver. At this point you would rewind the sprial balance, putting the correct amount of tension on it and reattach it to the pivot shoe assembly. Then the cap / cover at the top or along the side of the opening can be replaced. When you make the slice in the frame of the window, it may help to start the slice 1/2" from the top of the window, and stop the slice 1/2" above the bottom edge of the cap (for example) so that the cap still has something left to snap into. If you cut too much out the cap won't snap back in and you'd have to glue it. In some cases, the only way to replace the cap IS to glue it. Just depends on the window. If there is no cap, this slice will be like a battle wound on your window. Hopefully curtains or window treatments will make it less obvious.

Hopefully this helps, but if it isn't clear or raises additional questions, don't hesitate to ask.
Old 04-27-08, 08:21 PM
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look up the track to where the balance is mounted,if you unscrew the balance,you can move it up out of the way,and install the pivot shoe,usually only one screw holds the balance cover
Old 04-27-08, 10:31 PM
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Removal of the shoe on a vinyl window is most easily and quickly done with the assistance of a heat gun. Have your balance unhooked and your new shoe ready. If you heat up the vinyl not too much, just enough so it is plyable, you can bend the vinyl out of the way and the shoe comes out. Make sure you have everything ready before heating because it cools quickly and if you can get the old shoe out and the new one in a just a few seconds, you can put the vinyl back in the same exact spot because it has a "memory" or so those vinyl reps say. If the vinyl seems not exactly right just heat it up a little bit and it should go right back to where it was. I've changed many this way and never had a problem.

Good luck

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