LAJIAOZ Garage Door Plunger Bumper Pusher Spring Set

Pusher springs are a crucial component in the proper functioning of garage doors, especially when jackshaft side mount openers are installed on standard lift doors. These springs create a downward acting force against the top section of the garage door, preventing the cables from slipping off the drums.

The primary purpose of spring pusher installation is to maintain constant cable tension when the door is starting the down cycle. This is particularly important for standard lift doors, which lack the natural downward acting force present in high lift or full vertical lift doors. When an opener starts running with the door in the open position, there is a tendency for the door to initially jump, causing the cables to be thrown off the drums. Jack shaft operators installed on standard lift doors are especially prone to this issue due to the lack of a natural downward acting force.

In addition to maintaining cable tension, pusher springs also provide a secondary benefit of preventing the door from flying off the back end of the horizontal tracks in the event of user or operator error. This is especially crucial in loading dock bays and storage facilities, where people may fling the door upward with excessive force. Although track bolts are fastened to the ends of the horizontal track to stop door travel, pusher springs do a much better job of stopping the door's movement.

Pusher springs are often confused with a different part called a leaf bumper. While both are used to aid in the operation of garage doors, they serve different purposes. Pusher springs are spring-loaded and compress against the top section of the door as it travels towards the end of the horizontal track. When the door starts its downward travel, the pusher springs unload the compression force against the top panel, preventing the sudden jump that can cause cables to slip off the drums.

On the other hand, leaf bumpers are not spring-loaded and are used to keep the garage door from slamming into the track bolts at the end of the horizontal tracks. If you're looking to prevent your garage door cables from jumping off the cable spools, pusher springs are the solution. If you're aiming to prevent your garage door from slamming into the track bolts, leaf style bumpers are the appropriate choice.

Pusher springs are typically referred to by various names, such as plungers, bumpers, stoppers, and pushers. They are an essential component in maintaining the proper operation of most garage door systems in the United States. If you have any questions or concerns regarding the installation or use of pusher springs, please don't hesitate to contact the manufacturer or a qualified garage door professional.

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