Our sliding doors do have those screws at the bottom and top edge but they are on the side of the door compared to concealed inside a hole as you have shown in your photos.
Sliding door doesn t slide.
Never leave the glass door unattended.
First slide open the door completely and remove the head stop.
Be sure to check between the screen door and the glass.
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Look for the door manufacturer s name on the edge of the door or the hardware manufacturer s name on the roller.
Using pliers or a hammer bend the catch to the proper angle.
Most sliding doors have a mechanism called an adjusting screw located at the bottom of the door ends.
If after inspecting the track rollers and alignment and your door is still difficult to open and close it may be time for replacement.
You can order rollers and other door parts for repairing sliding doors through lumberyards and home centers or online.
Prime line black diecast sliding door outside pull keyed adams rite and w f model c 1139 16 00 16 00.
If you re confident that there s nothing else blocking the sliding patio door track then it s time to lubricate.
First check your sliding door tracks for any debris or dried liquid.
Sometimes a sliding door sticking can be caused by the door simply being too old and has underwent years of wear and tear.
Give the screw a clockwise turn and test to see whether the door slides easier.
To reshape a bent catch remove it and clamp it in a vise.
If the door still doesn t slide smoothly the rollers under the door either need adjusting or are shot.
Then lift the door up and out of the track laying it down carefully across two sawhorses.
If you see any clear the debris and wash the tracks with warm soapy water.
I unscrewed all these 4 screws and then on pulling on the door the frames came off the glass now we have a frame less door which still doesn t move easily.
Sliding doors are very heavy very breakable and very expensive this is a two person job.
Sometimes with a sliding door it isn t the track or rollers working improperly it s the catch.
If the door becomes even harder to open turn the screw in the opposite direction.