The original door closer shoe mounting holes were slightly farther apart than the 316R shoe mounting holes. Because of the oversized holes, there was no way to easily drill a second hole to accommodate the 316R shoe. The shoe arm swivel bushing was the same diameter and flat, making it easier to be able to interchange parts.
Since the two shoes and adjustable arms are very similar in design, they modified the height of the shoe swivel pivot using a grinding wheel in order for the 316R arm to slip into the existing door closer shoe.
The plate was mounted onto the door in the proper direction for the mounting holes in the surround frame. Four supplied Phillips head screws were installed using non-hardening thread adhesive.
The door closer body was installed onto the plate using the supplied Phillips Head screws. The swivel arm length was adjusted to enable the arm to be in the proper position when the door is closed. To gain the proper closing force, the closer arm was pre-loaded according to the instructions by attaching an adjustable wrench onto the upper end of the spindle.
Once the arm assembly was mounted and adjusted to 90 degrees, the next steps were to adjust spring power, sweep and latch, and backcheck. There is no doorstop for this door. Since there is no latch bolt on this door, adjustment was relatively simple. The door was opened a number of times to enable the door closer to be adjusted to properly close the door. The pre-load provided sufficient force to not allow the door to swing open as a result of HVAC pressure.
As door closers are having longer life expectancy and new models are being introduced, replacing older operating units is becoming more difficult. Keeping a record of the door closers installed for your customers or knowing the door closers as a result of a site survey can enable a single service call to determine the problem and be able to replace it if necessary.
For more information on the Design Hardware 316R Series Replacement Door Closer, contact your local locksmith distributor or Design Hardware, Telephone: 877-258-1262. Web Site: www.designhardware.net.