This Bell & Gossett Pump Coupler is an HD spring type counter clockwise rotation coupler with a ½" x ½" shaft that fits the following circulating pump models: B&G Unit: 2-1/2", HD Series, LD Series pumps in the following models: LD-3, HD-3, Obs. HLD-3, and Obs. HHD-3. It is constructed of cast iron. This spring coupler is Bell & Gossett model 118723.
The coupler is the most common part that needs to be replaced on a pump. A broken coupler is an indication that the motor mounts has lost their resiliency and that the pump shaft is now misaligned.
EC Part Number: #54176
Manufacturer Number: 118723
Manufacturer: B&G