Torsion Spring Special! Save 40% on the most common spring sizes!

How to Rebuild a Serco Hold Down Unit


Dock Leveler Safety Tutorial

Related Serco Hold down unit parts

Bracket (Holdown Housing Assembly)

Spring (Holdown Return o/s)

Retaining Plate for O/S holdown

End Plate (for O/S holdown)

Pinion Gear, Shaft and Guide Assembly

Release Gear - 8-8025

Release Gear - 328-792

Release Lever

DDM Garage Doors, Inc., Overhead Garage Doors, West Chicago, IL

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Dock Leveler Overview
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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.