CRAFTSMAN / SEARS model 139.18857 residential opener is a 1/2hp chain drive. It is part of the value. This garage door opener has an ac motor on 110vac. A battery backup is not available. The remotes are rolling code on 390. The rail is style is Split T.
The warranty on the garage door opener is 5 years on the motor and 1 year on the remaining opener parts from CRAFTSMAN / SEARS.
The model 139.18857 is discontinued.
CRAFTSMAN / SEARS model 139.18857 residential opener owners manual and instructions in PDF format at NO CHARGE!
VIEW / DOWNLOAD by clicking HERE
(1.67 MB in English) This requires Acrobat 10 or higher