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DDM Garage Doors Since 1982
Do-It-Yourself Garage Door Instruction Library
Adjusting your garage door opener can be quite confusing for someone who has never adjusted them. This video will explain to you how to adjust the lifting and dropping force of the door as well as how to adjust the maximum height and minimum height of your door.
In this step by step guide you’ll learn how to install an opener bracket on the top section of your garage door.
When the lay-person typically sees a circuit board, they immediately seize up and think that’s it’s too advanced for them to fix. In reality, replacing circuit boards for the Chamberlain Liftmaster, Sears, and Craftsman garage door openers is relatively easy with proper instruction. This video will walk you through the process of replacing the circuit board on a Chamberlain Liftmaster, Sears, and Craftsman garage door opener.
In this step by step guide you’ll learn how to replace the gear and sprocket assembly on Chamberlain, Liftmaster, and Sears openers that use chains and sprockets.
In this step by step guide you’ll learn how to replace the gears on Chamberlain, Liftmaster, and Sears openers that use chains and sprockets.
If the motor on your Genie opener is working but the screw won’t turn and the door won’t open the issue may be a damaged screw drive coupler. To learn how to replace the coupler check out this tutorial.
In this video we’ll show you how to repair a genie opener that was not properly assembled and has become damaged. We’ll also show you how to check a functioning Genie opener to ensure that an often overlooked piece was properly installed.
The first step in learning how to service dock levers is understanding how they work. Learn the function of components common to all dock levelers whether Mechanical, Hydraulic, or Pneumatic.
The first step in learning how to service dock levers is understanding how they work. In this video we’ll cover the primary operating mechanisms used by dock levelers. This includes both the general design as well as the specific lifting mechanisms which fall into three categories: Mechanical, Hydraulic, and Pneumatic.
This video was produced to help you understand how dock levelers work so you can determine if this is the sort of work you feel qualified to do.
Dock Leveler Repair
The following safety instructions are intended to help provide proper safety guidelines for working on any dock leveler. Like any mechanical piece of equipment, if the proper precautions aren’t taken, serious injuries or death may occur.
Most mechanical dock levelers use snubber mechanisms to lift the lips as they are raised, and they close slowly as shocks absorb the weight of the lip. In many of the Kelley dock levelers, however, a push bar and a yieldable rod are connected to a link assembly so that when the deck is raised the push bar drops down. Then, as someone walks across to the outside of the dock leveler, the plate on the push bar catches on the middle bolt allowing the push bar to raise the lip..
In most Rite-Hite dock levelers, a ring rolls in the curve of a lip keeper as someone walks across the deck of the dock leveler. This allows the lip assist bar attached to the ring to push the lip up. Over time, the bar connecting the ring and the lip assist bar wears out, and the ring is unable to stay on the track of the lip keeper.This indirectly prevents the lip from raising when someone pulls the pull chain. This tutorial demonstrates how to properly replace a worn lip assist bar in a Rite-Hite dock leveler.
In most Kelley dock levelers, a hold down housing stores a ratchet bar that locks to the bottom of the deck and keeps it closed. As someone pulls the release chain on the deck, the ratchet bar unlocks and extends, allowing the dock leveler to open.
When a Serco hold down unit ceases to function it may not need to be fully replaced. Instead you can disassemble the unit and replace the damaged components. This can save time eliminating the need to remove the housing, grinding, welding and installing a new unit.