Sprockets and chain are replaced in order to accelerate the ops limit shaft to increase the accuracy of the limit system for sectional doors 8ft H or less
IMPORTANT NOTE: The new safety reversing sensor brackets are only compatible with the new safety reversing sensors (041-0136) and are NOT compatible with older style safety reversing sensors.
For safety reversing sensor brackets compatible with models pre-2021 refer to 041A5266-3.
Includes 10 feet of signal hose outdoor air switch and hose plug
OPEN (all operators) when the vehicle passes over treadle hose. The weight of the vehicle on the treadle hose activates a pneumatic switch which sends an open signal to the door. Requires a 2-wire connection to the operator but does not require power to function.
The Apollo XBA4 is a 13.1 ft long line of indicator lights for the click fixture on the upper or lower side of the barrier arm of the M3BAR and M5BAR barrier gate openers.