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Month: July 2026

How to Replace a Forklift Pin Kit in 4 Simple Steps

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Forklift positioning pins (or locking pin kits) might be small components, but they play a vital safety role in your everyday operations. They lock your fork arms firmly in place along the carriage, keeping loads balanced and preventing forks from sliding unexpectedly while carrying heavy cargo.

When a pin breaks, wears out, or loses spring tension, replacing it immediately is essential. Follow this step-by-step guide based on Ichinen USA Corporation’s video walkthrough to replace your pin kit quickly and safely.

Tools & Equipment Needed

Before starting, grab the following basic items:

  • Replacement Pin Kit: Match the carriage class of your fork (e.g., Class II, III, or IV).
  • Pliers & Hammer
  • Grease or Lubricant: Any general shop grease, oil, or Vaseline works.

Step 1: Remove the Fork Arms from the Carriage:

  1. Apply Lubricant: Dab a little grease along the top rail of the carriage to help the forks slide smoothly .
  2. Unlock the Pin: Flip the pin lever straight up into the unlocked position.
  3. Align with the Center Notch: Slide the fork arm to the center of the carriage where the bottom notch is located. Pull up slightly so the bottom hook clears the notch.
  4. Lower to the Floor: Using the forklift controls, gently lower the carriage until the forks come free from the top rail and rest stably on the ground.

Step 2: Extract the Old Pin Mechanism

Work from the back of the unmounted fork arm:

  1. Keep the lever standing straight up.
  2. Grip the pin with pliers and pull firmly until the old assembly releases.
  3. The old spring and stop pin will drop out from the bottom.

Step 3: Assemble & Install the New Pin Kit

  1. Prep the Spring: Slide the spring over the top of the new stop pin (the larger head sits at the bottom).
  2. Insert into the Mounting Hole: Push the pin and spring combo up into the bottom hole of the fork arm. Ensure the slit at the top of the pin sits horizontally.
  3. Attach the Lever: Place the locking lever into the slit and line up the small pin holes.
  4. Secure the Roll Pin: Push the small roll pin into the hole until it catches lightly, then use a hammer to tap it flush into place.

Step 4: Reattach and Lock the Forks

  1. Remount: Drive the forklift forward slowly, positioning the top carriage rail under the top fork hooks, then raise the carriage slightly off the floor.
  2. Seat the Bottom Hooks: Slide each fork toward the center notch until the bottom hook slips securely back over the rail.
  3. Lock in Place: Adjust the forks to your desired width, then push the top lever down flat.

Safety Check: After locking the lever down, give the fork arm a quick jostle side-to-side. You should hear an audible “click” as the pin drops into the carriage notch, confirming it’s fully locked.

Need Replacement Parts?

Keeping a spare pin kit in your maintenance shop ensures zero unnecessary downtime when pins show signs of wear. If you have questions about choosing the right class kit for your equipment, reach out to us and we will be happy to help guide you.

How to Measure Your Forklift Arms: A Step-by-Step Guide

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Ordering replacement fork arms for your forklift might seem like a headache, but getting the right dimensions is crucial for safe load handling and maintaining optimal capacity. The good news? You don’t need specialized tools to figure it out—a standard tape measure is all it takes.

Follow this four-step guide based on Ichinen USA Corporation’s quick video walkthrough to ensure you get the exact fit every time.

Step 1: Identify Your Carriage Class

Before measuring the fork itself, you need to identify the carriage class. This tells you how the forks mount to the truck’s carriage.

To find this, measure the vertical distance between the inner notch of the top hook down to the inner notch of the bottom hook along the back of the shank:

Carriage ClassHook DistanceCommon Truck Capacity
Class II~16 inches 2,000 – 5,500 lbs
Class III~19 inches 5,500 – 10,000 lbs 
Class IV~23.5 inches10,000 – 17,500 lbs

Step 2: Measure Width and Thickness

Next, measure the cross-section of the fork blade near the vertical shank:

  1. Width: Measure horizontally across the top flat surface of the blade.
  2. Thickness: Measure vertically down the side profile at the top section.

Pro Tip: Always measure thickness near the heel/shank where the steel hasn’t worn down, rather than near the tip where everyday friction thins out the metal.

Step 3: Measure the Blade Length

Measure straight along the top surface of the horizontal blade, running from the very front face of the shank all the way out to the tip. Standard lengths typically range from 36 to 72 inches, with 48 inches being the most common choice across industries.

Step 4: Putting It All Together

When ordering, fork measurements are written in a standard format:

Carriage Class x Width x Thickness x Blade Length

For instance, if your tape measure shows:

  • Carriage: Class II (~16″)
  • Width: 4 inches
  • Thickness: 1.5 inches
  • Length: 48 inches

Your final order spec is: Class II – 4″ × 1.5″ × 48″.

Ready to Replace Your Forklift Arms?

Taking two minutes to confirm these four dimensions eliminates guesswork, prevents costly order returns, and keeps your warehouse running smoothly .

If you have questions about custom dimensions, non-standard hooks, or special load requirements, reach out to an equipment specialist today to get the exact forks you need.