Bell Gossett Bg 118709 Spring Type Coupler Pump

Product Description

The BELL GOSSETT BG 118709 is a spring type coupler designed for use in hydronic heating pump applications. This coupler connects the pump motor shaft to the pump end, transmitting rotational force while accommodating minor shaft misalignment. It measures 5/8 inches by 1/2 inches and uses a spring-type design that absorbs shock loads and reduces vibration transfer between drive and driven components. Licensed HVAC mechanics and hydronic heating technicians are the primary installers. The part is an OEM-style replacement component intended to restore pump operation when the original coupler wears or fails.

This coupler is used in residential and light commercial hydronic heating systems where BELL GOSSETT circulation pumps are installed. It is compatible with Series PD-35, Series PD-37, Series 60 AA, and Series 1522 pump assemblies. The Series 1522 is an obsolete pump line, and this coupler supports legacy system maintenance on that platform. Typical installation occurs during pump rebuilds, motor swaps, or coupler replacement service calls on baseboards, radiant, or forced hot water heating systems.

Key Features

• Spring type design absorbs shock and reduces vibration between motor and pump end
• 5/8 inches by 1/2 inches shaft bore dimensions for direct OEM fitment
• Compatible with both active and obsolete BELL GOSSETT pump series
• Heating application rated for hydronic circulation pump service
• Replacement component supports field rebuild without full pump assembly replacement

Compatibility

Compatible with BELL GOSSETT Series PD-35 pumps, Series PD-37 pumps, Series 60 AA pumps, and Series 1522 pumps (obsolete).

Installation Notes

Installation is performed by a licensed HVAC technician or hydronic heating mechanic. The heating system must be fully powered down and the pump circuit isolated before removing the motor or accessing the coupler. Inspect shaft ends for wear or corrosion before installing the new coupler. Follow applicable mechanical codes and the pump manufacturer service documentation for reassembly sequence.

Technical Specifications

• Type: Spring Type Coupler
• Bore Dimensions: 5/8 inches x 1/2 inches
• Application: Heating
• Used With: Series PD-35, Series PD-37, Series 60 AA, Series 1522 (Obsolete) Pumps

Standard Information

• Brand: BELL GOSSETT
• Manufacturer Part Number: BG 118709