070916 - Miller 091071 Coolant Pump Rebuild Kit

Technical Overview of the Miller 070916 Pump Repair Kit

The Miller 070916 Pump Repair Kit is a specialized maintenance package designed for the overhaul of the Miller 091071 rotary vane pump. This pump is a critical component in various Miller Coolmate coolant systems, responsible for circulating cooling fluid to water-cooled TIG torches and MIG guns. Over time, the internal components of a rotary vane pump—specifically the graphite vanes and the liner—experience wear due to friction and continuous operation. This wear leads to a decrease in output pressure and flow rate, potentially compromising the cooling efficiency of the welding system and risking thermal damage to the torch.

This OEM kit provides the essential internal components required to rebuild the fluid end of the pump. By replacing the worn vanes, liner, and associated seals, technicians can restore the pump's hydraulic performance to factory specifications. The kit is engineered to meet the precise tolerances required by the 091071 housing, ensuring a proper seal and efficient fluid transfer. Using genuine Miller parts guarantees compatibility with the specific coolant formulations recommended for Coolmate systems, preventing premature degradation of seals that can occur with non-OEM materials.

Installation of the 070916 kit requires disassembly of the pump head. It is intended for use by qualified maintenance personnel familiar with the mechanics of rotary vane pumps. The kit addresses common failure modes such as low pressure, flow pulsation, and minor internal bypassing. It does not include the electric motor or the pump housing itself, as these components typically have a longer service life than the internal wear parts.

Kit Applications

• Target Component: Miller 091071 Coolant Pump
• System Compatibility: Miller Coolmate Systems utilizing the 091071 pump
• Function: Restoration of coolant pressure and flow volume