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Technical Support Archives - DDM Garage Doors Blog

Garage Door Rollers

Saturday, June 17th, 2023 at 12:17 pm by Philip Kendall

Garage door rollers are the small wheels that run along the metal tracks on the sides of your garage door. They guide the door travel in the tracks to help the door open and close smoothly and quietly. In this blog post, we will outline the different types of garage door rollers and how to maintain them so that they continue to run smoothly.…

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Wayne Dalton Garage Door Repair

Saturday, June 17th, 2023 at 11:56 am by Philip Kendall

Wayne Dalton garage doors use a unique spring counterbalance system called TorqueMaster. They designed this system with safety in mind, making it easier for DIYers to install, adjust, and replace their own springs. In this blog post, we will help you find the resources you need to repair your Wayne Dalton garage door.…

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LiftMaster Garage Door Openers

Saturday, June 17th, 2023 at 11:50 am by Philip Kendall

LiftMaster is a division of the Chamberlain Group. Their products include residential garage door openers, commercial door operators, and gate entry systems. LiftMaster has a history of producing high-quality products. We sell residential LiftMaster openers, commercial LiftMaster operators, and gate operators, as well as a variety of LiftMaster parts and accessories.…

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Garage Door Pulleys

Saturday, June 17th, 2023 at 11:11 am by Philip Kendall

Garage door pulleys are part of the counterbalance system for extension spring doors. Most doors have four pulleys, or two on each side. There are two stationary pulleys, and a pulley attached to one end of each extension spring. Garage door pulleys are not the same as cable drums, which perform a similar function on garage door torsion spring assemblies.…

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What Type of Garage Door Seal do I Need?

Tuesday, May 16th, 2023 at 3:42 pm by Philip Kendall

Garage door seals (also known as garage door weatherstripping) are essential for keeping your garage clean, dry, and comfortable. Garage door seals act like a gasket for your garage door. They prevent rain, snow, dust, insects, and rodents from entering your garage through the gaps around the door.…

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How to Best Use the DDM Garage Doors™ Parts Page

Monday, May 15th, 2023 at 2:31 pm by Philip Kendall

Are you looking for garage door parts but don’t know where to start? DDM Garage Doors is a garage door parts retailer based in the Chicago area, although we serve customers worldwide. Our mission is to help our customers find, order, and safely install garage door parts.…

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How to Select Bottom Retainers

Tuesday, May 9th, 2023 at 3:17 pm by Philip Kendall

Back in 2014, we released a series of videos about how to select bottom retainers. Bottom retainers hold the bottom seal inserts that keep dust, leaves and insects out of your garage. They come in a variety of shapes and sizes, depending on your needs and the shape of the garage door.…

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How to Install PVC Stop Molding on a Garage Door

Tuesday, May 9th, 2023 at 3:15 pm by Philip Kendall

Garage doors can get drafty, especially during the winter months. Even in warmer climates, insects and small animals can try to get in around or through a poorly sealed garage door. Installing garage door PVC stop molding, also known as garage door weatherstripping, will help keep cold and critters on the outside of your garage.…

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Twin Contact Bottom Seals

Tuesday, May 9th, 2023 at 2:35 pm by Philip Kendall

Garage door bottom seals act like a garage door gasket. They keep water, debris and small animals from coming in under the bottom of your garage door. Since there are a variety of different types of bottom seals and retainers, deciding which type to use can be difficult.…

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How to Rebuild a Serco Hold Down Unit

Wednesday, January 11th, 2023 at 4:42 pm by Philip Kendall

In this video, Dan explains how to take apart and then put back together a Serco dock leveler hold down unit.

Disassemble the Hold Down Unit

A Serco hold down unit in the dock leveler
Serco hold down unit in the dock leveler
Serco hold down unit that we used for demonstration purposes in the video.
Serco hold down unit used for demonstration purposes

To take apart and rebuild a Serco hold down unit, you will need 9/16″ and 3/4″ wrenches, as well as an adjustable wrench.…

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Unmatched Support. The Right Part. Verified Quality. DIY with Confidence!

Huge inventory of torsion springs for same or next day shipping! Here you will find all you need in the most common sizes of 1 3/4," 2," 2 1/4," and 2 5/8" inside diameter springs. Larger 3 3/4" and 6" inside diameter commercial and industrial springs may require a day or two to ship. You'll also find TorqueMaster Springs, Extension Springs, Self-Storage door springs, steel rolling door springs and springs for one piece single panel doors.

Shelves packed with every part you need to fix your doors.

Please note. Shipping times and costs have changed. Normal transit times are currently not guaranteed, even on next day and second day shipments. Shipping prices on items over eight feet have more than tripled.