Making an adjustment to a commercial door closer if you find that there is oil in the cover or oil on or leaking from the closer body stop right there you need a new.
Glass door closer adjustment.
Increase the closing speed.
They should be marked on the closer.
Now that you have the cover off you should be able to see the adjustment screws.
If you are capable of doing this work yourself.
Make adjustments to your pneumatic screen door closer storm door closer twice a year when you exchange the screens and glass storm panels.
If none of these adjustments works then your door closer may be worn out and you will need to buy a new one to replace.
Decrease the closing speed.
If your closers are operating either.
Move the long connecting pin into the forward hole for winter or rear hole for springtime of the closer each time you change the storms or screens.
Remove the plate to inspect the door closer body for leaks see below if adjustment holes had not been drill during the original installation measure where the adjustment screws are located.
The self closing speed is micro adjustable through the speed screw at the bottom.
Adjust swing latch speed.
Replace the plate and if necessary the door and you.