If you can t see adjustment screws chances are the closer has a cover.
Overhead door closer adjustment.
The valve is an allen head screw.
Door closers usually come with two types of cover.
They should be marked on the closer.
So in order to adjust its systems you got to remove the cover first.
Now that you have the cover off you should be able to see the adjustment screws.
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.
105 back stop with hold open 105 back stop no hold open 90 back stop with hold open 90 back stop no hold open suitable for both center hung double or single acting and offset doors.
If there is just one screw on your door closer turn it clockwise to increase the speed with which the door closes.
Storm doors have a connecting pin that can be set into two separate slots to change the tension on the door.
Bring a step ladder tall enough so that you can easily reach the door closer from the second or third highest step.
Adjustable spring power overhead concealed closer built in positive back stop and hold open positions available.
Position a stepladder under the yale closer.
For utmost protection the door closer is certainly going to have a cover over it.
If you find that there is oil in the cover.
Locate the back check valve on the bottom of the closer between the arm and the door jamb.