Buying Guides

Interlocks stop a leveler or door from operating until the trailer is restrained. Here's what a prox switch and PLC interlock actually does, and how to tell if yours has failed.

When a Serco PitBull trailer restraint won't engage, won't confirm a lock, or the arm won't hold tension, the cause traces back to one of a handful of parts. Here's how to diagnose it before calling for service.

A worn lift arm, pivot pin, or roller makes a DLM dock leveler feel loose or noisy under a forklift. Here's how to identify which part failed and replace it correctly.

If your DLM dock leveler won't hold its lip down, won't release, or clunks under a forklift, the fix is almost always the lip keeper, the safety leg assembly, or the snubber chain. Here's how to tell which one you need.

A Blue Giant leveler that feels heavy under a forklift or won't rewind its lip after a trailer pulls out usually isn't a main spring problem — it's the float and rewind mechanism. Here's what to check.

High-traffic docks put extra structural stress on a leveler's frame and leave the deck-to-pit gap exposed more often. Here's when a DLM cross traffic leg kit or toe guard kit is worth adding.