LIFTMASTER model 1140 residential opener is a 1/4hp chain drive. It is part of the premium series. This garage door opener has an ac motor on 110vac. A battery backup is not available. The remotes are dip switch on 390. The rail is style is Solid T.
The warranty on the garage door opener is 1 year on the motor and 1 year on the remaining opener parts from LIFTMASTER.
The model 1140 is discontinued.
LIFTMASTER model 1140 residential opener owners manual and instructions in PDF format at NO CHARGE!
VIEW / DOWNLOAD by clicking HERE
(0.21 MB in English) This requires Acrobat 10 or higher