How to Check Chain Wear:

1. 1. Position the Chain Checker just above the chain and hold in place with one hand.
   2. Use your free hand to push the chain up onto the Chain Checker at position 1 so that a roller is cupped by the curved protrusion. Hold in place with left hand.
   3. Use your right hand to push the chain firmly onto the Chain Checker at position 2 to create tension in the chain between the rollers at positions 1 and 2. Continue applying pressure on the chain upward at position 2 and release your hand from position 1.
   4. Finally, while keeping pressure at position 2, push the chain onto the Chain Checker at position 3. The Chain Checker II provides two levels of wear indication: If the chain is worn between than 0.5% and 0.75%, the protrusion at position 3 will go half-way through the chain. If the chain is worn more than 0.75%, the protrusion at position 3 will go fully through the chain past the roller. If you cannot push the protrusion through the chain at position 3 at all, then the chain is worn less than 0.5%.

Pedro’s and most chain manufacturers recommend replacement at 0.75% wear, while some manufacturers suggest replacement at 0.5% wear. The Chain Checker Plus II provides indication at these two levels to allow you to decide when best to replace your chain.

How to Use Chain Hook:

1. 1. Position Chain Checker above the chain with the two matching hooks facing downward.
   2. First hook one of the two hooks around a roller on the chain.
   3. Next locate a roller 5-8 rollers away from the first one and pull it onto the second hook. This will create a slack section of links. See image below.

Posted in: Chain Checker Plus, Tools FAQs