How to Check Chain Wear:
- Position the Chain Checker just above the chain and hold in place with one hand.
- 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.
- 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.
- 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:
- Position Chain Checker above the chain with the two matching hooks facing downward.
- First hook one of the two hooks around a roller on the chain.
- 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.