so what does she replace it with

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The fluid in an LCN closer must not be refilled in the field. See attached Warranty and Repair Communication 
The replacement arms for the older handed 4010SE/4110SE closers would be ordered as: 4040SE-3077T x ST-3035 for a RH arm. 4040SE-3077T x ST-3035-1 for a LH arm. 
If you have an old digital 4630 or 4640 operator with an I/O Board assembly that has two terminal strips, one with terminals 1-12, and the other that has 13-24 and you are in need of replacing the ...