LiftMaster 3950 3950 Addendum Manual - Page 4

Door Construction, Drum Holes To Inspect For Obstruction - used

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Mounting Hole (PEM nut may be present) 2.25" Figure 5 - Drum Holes To Inspect For Obstruction Door Construction The Dead Shaft Door must not have more than a 2" inset from the curtain edge to the drum. The Model 3950 comes with a selection of spacers that can be used in conjunction to provide a maximum 3" of spacing. 4

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Figure 5 – Drum Holes To Inspect For Obstruction
Door Construction
The Dead Shaft Door must not have more than a 2" inset from the curtain edge to the drum. The Model 3950 comes with a selection of
spacers that can be used in conjunction to provide a maximum 3" of spacing.
Mounting Hole
(PEM nut may be present)
2.25"