The door closers I've served, here is the wisdom:
* Sometimes there is a plastic or metal cover, you need to loosen a phillips
screw to get the cover off.
You'll need a two or three step stool, so you can get up to the closer and
make the adjustments. Generaly only turn an adjustment half a turn (180
degrees). And then move your stool, and open the door wide open. Let it
close on its own, and see that's what you wanted to happen. Let the door
close two or three times to see how much you changed it, and if that's more
what you wanted.
The adjustments are typically labelled L, S, and BC. The tool you need is an
allen key (six sided wrench).
Sweep adjusts how fast the door swings from wide open to nearly shut. Turn
the adjuster in (clockwise / right) to make the door swing slower. Never try
to swing the door while the screw is completely cranked in.
Latch adjusts how fast the door swings when it's almost closed to when it is
closed. Clockwise is slower. It is possible to set a door to sweep quickly,
and then suddenly slow down right before it closes.
BC / Backcheck sets how much the door resists being over -opened, or opened
past 90 degrees. I've never needed to adjust this.
If these adjustments don't work, it is because the closer has lost all the
hydraulic fluid, and needs to be refilled or replaced. Closers which slam
the door very often need to be refilled. And that's another news group post
Put the plastic cover back on.
Christopher A. Young
You can\'t shout down a troll.
Click to see the full signature.