adjust closing force

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Answer
The size 6 handed closers will have the most (strongest) closing force. The 4016 (pull side), the 4026 (top jamb push side) or the 4116  (push side parallel arm)  have the highest closing force.
Force, Spring, Spring Size, Closer Size
Mechanical pre-loading of spring to adjust closing force
The regulation valves are designed to adjust the flow the hydraulic fluid in the closer which regulates the door closing speed through various phases of the closing cycle. The regulation valves h...
How to:  What are the steps to adjust a door closer?Facts: All LCN and FALCON door closers will have 3 regulating valves and a spring adjustment.  All closers with a "Delay" feature ...
120V Models: The hold open force on the 2310ME / 4310ME / 4410ME closers is "NOT" adjustable. 24V Models: There is a trimpot adjustment on the circuit board that allows you to "REDUCE" the hold op...
Power Boost is a positive latching feature that increases the latch force, to over come building stack pressure or door weather stripping, etc, if the door stops before coming completely closed. T...
The hydraulic closer underneath the control box has 3 regulating valves (like any 4040 series hydraulic closer). Main Speed - adjust closing speed from 90° open down to 10°. Latch Speed - adju...
To correctly answer this question, we need to know how much more force is required to get the door closed. They could try turning the Rod & Shoe over (short side of shoe towards the hinge), or they...