Yes, it is possible to convert the Glynn-Johnson Overhead units from Stop to Holder function, or from Holder to Stop function. Note that fire-rated doors may not be held open with overhead holders.
70/79 Series: Parts are needed.
To convert from a holder to a stop, a stop washer is added and the hold open hook is removed.
To convert from a stop to a holder, a stop washer is removed and the hold open hook is added.
90 Series: A conversion kit is needed. Conversion instructions can be found here.
100 Series: A conversion kit is needed. Conversion instructions can be found here.
410 and 450 Series (400 Series): A conversion kit is needed. Conversion instructions can be found here.
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