Crown Engineering 10010 Coupler 321894-709 This collar is specifically intended

This collar is specifically intended for 1/2" round or 3/8" square shaft adapters

Optimized Compatibility: Engineered specifically for Nordyne-manufactured air conditioners and heat pumps

making it compatible with most industrial control circuits and pump starters

When troubleshooting common lockout codes or erratic ignition sequences

verifying the amperage draw against the original specs is critical

Crown Engineering 10010 Coupler 321894-709 This collar is specifically intendedThe Crown Engineering 10010 Coupler is a professional grade Spiralink pump coupler designed for high torque hydronic heating systems. Specifically engineered for 1 12 to 1 3 HP motors, it features a unique single spring spiral design that provides 3 dimensional flexibility to compensate for shaft misalignment between the motor and the pump head. Unlike older, multi part "fly away" couplings, this one piece HVAC pump coupling eliminates friction