How Mechanical Dock Levelers Work

Dock Leveler Safety Tutorial

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. If you do feel confident working on levelers, and if you remember only one thing from this video, it is this: DOCK LEVELER WORK IS DANGEROUS! Please review, understand, and follow our Dock Leveler Safety Instructions. In addition to this, be advised that it is impossible to anticipate every safety hazard you may encounter. Use your common sense, and, when in doubt, do not get under the leveler.

Only when safety is the priority can you enjoy the thrill of learning new skills. Good mechanics are drawn to the door and dock industry. I started in January of 1979, and I knew after the first week that I could spend the rest of my life in the trade. It’s a pleasure being employed in a job in which every day is different, and the challenges of our work will keep you on your toes throughout your career.

This video the biggest project DDM Web Services has produced for our company. It is the result of many hours of scriptwriting and videotaping, and many, many months of our animator, Chris David. He is to be commended for this outstanding achievement.

The video covers primarily mechanical dock levelers, but there is enough information on pneumatic and hydraulic levelers to provide a basic understanding of how they work.

Mechanical dock levelers come in many designs. Primary attention has been given to the most common types, such as the McGuire, Blue Giant, and DLM. Still, special attention has also been given to the Kelley Power Pak, Serco compression springs, and the Rite Hite cam system for extending and lowering the lip.

If you are unfamiliar with dock levelers, we believe this video will open your understanding of how most levelers work. Furthermore, viewing our tutorials on Dock Leveler Repair and accessing the Dock Levelers overview page can provide you with extra benefits.


Dan Musick, President,

DDM Garage Doors, Inc.

Unmatched Support. The Right Part. DIY with Confidence!

YES, WE'RE OPEN FOR BUSINESS!Due to the Coronavirus and the Delta varation, we have changed our local order pickup policy at our West Chicago location. To pick up an order you will need to order first. The quickest way to do this is through our online shopping cart. There you can select the local pickup option. Or, you can call 630-293-1337 for assistance and to place your order. When ready, we will call you and your parts will be available for pickup in the front entrance on the north side of the building. Longer items will be picked up on the south side loading dock. Please do not arrive until you have been notified that your order is ready.

COVID / DELTA VARIANT UPDATE! NO MASK, NO SERVICE! When picking up parts please wear a mask. If you don't bring one we'll gladly provide one. Please honor the six foot social distancing rule to protect yourself and our employees. Thank you for your patience and understanding as we all navigate this challenge together. More information is available on our blog titled DDM Adjusts to the COVID-19 Coronavirus. In the same article you will also find documentation and an answer to the question: "Is a garage door repair company a life sustaining business?"

PLEASE NOTE: COVID has interrupted global supply distribution chains resulting in unprecedented delays on incoming door and dock industry products. The result is limited availability of many products, three month delays on incoming shipments, and an inflationary rate of over 50% just this year on many of our products.


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