LCN DATE CODE

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The date is a 4 digit #. The first 2 numbers indicate the week it was made, and the last 2 numbers indicate what year it was made. On most surface mounted closers, the model #,  date code, ...
The LCN "Traditional" series closer line was discontinued in 1980.  
The date stamp on a 4041/4040XP is on the packing nut.  The date will be the week of the year and then the year. EXAMPLE: 10 05 would be week 10 of 2005.  For example see...
The date of manufacture printed on the chassis cover (see below), will determine if you have a revised or old chassis. Chassis manufactured mid-June 2013 will have the new improvements. The first t...
An error - E04 - is an indication of a constant activation input from either the "Hold Open" switch or a "Wall Activation" switch when the 4600 power is turned on. This condition also occurs when l...
Here is an updated list of errors shown on keypad display of the Senior Swing control: Er04 - Voltage Monitor was high during Opening hardware check. Er05 - Master or slave CPU has oscillator ...
The Date Code and Closer Size are stamped in the backside of the closer body. Closer Size: If the number is "1", the closer is a 2031 or 5031. If the number is "3", the closer is a 2...
LCN started putting on the green dials for the spring adjustment on the 4041's in 2001.