Spiral Retaining Ring Installation Made Easy - Engine Builder Magazine

Spiral Retaining Ring Installation Made Easy

Pistons, such as those from KB Pistons, are designed so they can be used as either a full floating pin or a pressed pin assembly and require the use of spiral retaining locks (Figure 1).

Retaining Ring Installation

To install the retainer (Figure 2), first stretch it to approximately 3/4? by grasping the two ends and stretching it. When used with a pressed pin application the lock rings must not be used! Place the end of the retaining ring in the retaining ring groove and, using a small screwdriver, press the retaining ring in place, moving around the pin hole in a circular pattern to spiral the complete retainer into place.

Retaining Ring Removal

To remove the retaining ring (Figure 3) requires two screwdrivers. Secure the piston with the connecting rod and soft materials to prevent piston or rod damage. Pick the end of the retaining ring out of the groove with a small screwdriver, and with a second small screwdriver spiral the retaining ring clear of the pin hole.

–Tech Tip courtesy of United Engine & Machine Co. figure 1 - spiral ring locksfigure 2 - installing ring locksFigure 3 - Removing ring locks

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Engine Builder and Engine Pro present Shop Solutions in each issue of Engine Builder Magazine and at enginebuildermag.com to provide machine shop owners and engine technicians the opportunity to share their knowledge to benefit the entire industry and their own shops. Those who submit Shop Solutions that are published are awarded a prepaid $100 Visa gift card. Submit your Shop Solution at [email protected]. You must include your name, shop name, shop address and shop telephone number. Submitted Shop Solutions not published will be kept on file and reevaluated for each month’s new entries.

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