In order to explain what are 5th wheel couplers, let's go over the components that make a complete coupler.

A 5th wheel trailer has a king pin at the front of it which the hitch on the truck clamps around.  

The 5th wheel coupler is mounted to the king pin on the trailer. The king pin, together with the rest of the mounting area, called the 'king pin box' make up the coupler. Most 5th wheel...

Hitchweb received an email with a question that has been asked previously:
 

From: Customer
To: info@hitchweb.com
Subject: TOW & STOW ADJUSTABLE BALLMOUNT
Date: Wed, 29 Feb 2012 08:37:04 -0800

There are 3 steps to follow once you have selected your PullRite 5th Wheel hitch to complete your setup to be sure you have the right install kit and capture plate to hook up your trailer. The 3 steps you follow will depend on which PullRite SuperGlide 5th Wheel Hitch you purchase.

HITCHES REQUIRING STANDARD UNIVERSAL RAILS:

When using or buying any of these 5th wheel hitches, you will require standard (universal) rail kits.

A worn out or faulty brake magnet can impact the trailer's power to stop. While some magnet problems will be noticeable just by looking at your magnet, there may also be electrical problems that can effect performance. An impaired brake magnet can lead to weak or surging brakes, or cause the brakes to pull to one side. It is important to inspect and test the magnets each time the brakes are worked on.

How To Test Trailer Brake Magnets:

Steps for Visual Inspection:

1. If any coil can be seen on the center of the magnet, the magnet is worn out and should be replaced

2. Take a straight edge tool and lay it across the top of the magnet. The edge of the magnet should be parallel to the straight edge all the way across. Any pitting or changes in the magnet's surface indicate abnormal wear and the magnet should be replaced.

3. Inspect the magnet for grease or oil residue, if any is found replace the...