13178b trailer side hinge

A Detachable Trailer Side Hinge (often called a Lift-Off Hinge or Slip-Joint Hinge) is a two-piece hardware system that allows you to swing a trailer’s side panel open like a normal door, or lift it off entirely without using tools.

While a standard hinge is permanently joined by a pinned center, a detachable hinge is designed to "unplug," allowing you to convert a utility trailer into a flatbed in seconds.

How It Works: The "Male & Female" Design

These hinges consist of two distinct parts that slide together:

1. The Gudgeon (Male Part): This is a heavy-duty bracket with a fixed vertical pin. It is usually bolted or welded to the trailer frame or corner post.

2. The Strap/Leaf (Female Part): This is a metal arm with a hollow "curl" or tube at the end. It is attached to the side panel.

To install the side, you simply line up the "curl" over the "pin" and drop it into place. Gravity and the weight of the panel keep the hinge assembled. To remove the side, you open the latch, swing the panel to a 90-degree angle (or whatever angle the design requires), and lift it straight up.

Common Types

• Standard Lift-Off: The most common variety for "utes" (utility trucks) and trailers. One side has a pin pointing up, and the other has a tube that slides over it.

• Flag Hinges: Shaped like two flags on a pole. These are very strong and commonly used on heavy-duty steel dropsides.

• C-Shape / G-Shape Sideboard Hinges: Specifically designed for "dropside" trailers. These often have a "hook" shape that allows the panel to hang vertically when open or be slid sideways off the pin once dropped down.

Key Features and Benefits

• Tool-Free Removal: Ideal for when you need to load a pallet that is wider than your trailer bed; you just "pop" the sides off and set them aside.

• Greaseable Pins: Many high-end trailer hinges include a "Grease Zerk" (a small nipple) on the pin, allowing you to pump in lubricant so the heavy sides don't squeak or seize up.

• Nylon Bushings: Better kits include a nylon sleeve inside the female part to prevent metal-on-metal grinding and ensure a snug, rattle-free fit.

• Handedness: Note that many lift-off hinges are "Left-Hand" or "Right-Hand" specific. If you buy two "lefts," one side of your trailer will lift off normally, but the other might be upside down!

GL-13178B Detachable Folding Side Hinge For Trailer very popular style 

Jiaxing Ganland Auto Parts Co., Ltd. is a professional manufacturer specializes in designing and producing different types of machinery parts for trucks and other commercial vehicles. Our main products include Truck Trailer Cam Door Locks , Toolbox Serie, Truck Door Hinges, Fastener Serie, Cargo Control, Curtainsider Truck Parts, Wing Opening Van Parts , Rubber Bumpers & Buffers, Trailer Mudguard , Truck Door Seal , Excavator Body Parts, and Other Hardware And Accessories