This is installed onto the panel when the door is opened it is engaged and will keep the door open above the header so there is no hang down of the door.
The door will stay open above the header to eliminated the door being damaged.
For use with various LiftMaster® MAXUM Series DC 700 lbs. to 2200 lbs. Standard-Duty and Extended-Duty Jackshaft Jackshaft Hoist and Trolley Commercial Door Operators
This service kit is compatible with the following MAXUM models: JDC JHDC and TDC.
NOTE: Refer to K41-0157-000 for Right-Side Cable Tension Monitor
K20-8100M-DC is a 1HP Motor Replacement Kit (90VDC BM CF). For use with various LiftMaster® 1HP 1-Phase Commercial Door Operators and Gate Operator Systems