How do you inspect a trailer with kingpin?

Kingpin Inspection and Maintenance Recommendations

How do you inspect a trailer with kingpin?

Kingpin Inspection and Maintenance Recommendations

  1. Using a 48-inch straight edge or a large metal right angle square, check the upper coupler plate flatness in all directions as shown in Figure 1.
  2. Using a square or Holland Kingpin Gage (TF-0110), check to see if the kingpin is bent.

What is an upper coupler inspection?

(ix) For cargo tanks transporting lading corrosive to the tank, areas covered by the upper coupler (fifth wheel) assembly must be inspected at least once in each two year period for corroded and abraded areas, dents, distortions, defects in welds, and any other condition that might render the tank unsafe for …

How is kingpin measured?

kingpin to center of single axle or center of tandem the over length kingpin is measured from the kingpin to the rear of the trailer or overhang. If the kingpin is over 50′ the vehicle or load is over length and needs a permit.

How long should kingpins last?

about 750,000 miles
How long do kingpins generally last? In general, kingpins have a lifespan of about 750,000 miles. With good maintenance, it’s unlikely that you’ll ever need a kingpin replacement more than once in your truck’s lifetime.

How much does it cost to replace kingpins?

The cost for a kit containing bushings and kingpins can range from $500 to $1,500 and replacing them is very time consuming. Graco automatic lubrication systems can help you properly lubricate kingpin bushings, resulting in a much greater reduction in kingpin failures caused by improper lubrication.

What is kingpin in trailer?

The King Pin connects the gooseneck to the tractor by locking into the fifth wheel. The Standard King Pin is located 15″ back from the front edge of the gooseneck and is welded to the fifth wheel plate. A Two-Position King Pin is also available as an option for most ROGERS semi-trailers.

How do I check my kingpin dial indicator?

Routine Inspection: Install a dial indicator so that the base is on the I-beam and the tip is against the side of the top of the knuckle. Set the indicator to zero and move the top of the tire side-to-side after raising the vehicle and installing jack stands. Repeat for lower bushing.

What causes king pin failure?

Four of the most common causes of industrial caster failure are applications that involve excessive speeds, uneven loading, rough terrain, and/or excessive temperatures.