Backwash Pump Rehabilitation

The pulling and rebuilding of a Johnston Horizontal Turbine Pump to include machining for a Chesterton 155 cartridge mechanical seal. The repair work shall include, but may not be limited to, the following items Initial on-site inspection of the pump, tear down, and removal of all or portions of the pump. Removal and replacement of shaft sleeve to accommodate specified mechanical seal. Provide cost as alternate to fabricate or purchase new 416 stainless steel shaft to replace the existing. Machining of packing box as needed to accommodate a mechanical seal. Clean and inspect all remaining parts and machine as needed to accept new seals. Replace bearings and races, O-rings, and gaskets. Inspect and replace rotating and stationary wear rings. Dynamic balance of rotating element. Reassemble and align pump and motor. Pressure test pump to ensure operation at duty point. Clean exterior surface to remove all grease/oil. Sandblast and paint with Sherman Williams product: Sher-Kem, F75-LC14, 6016-49411 or approved equal paint.

Division 02 -	Existing Conditions, Subsurface Investigation.
Division 03 -	Concrete, Cast-in-Place Concrete.
Division 22 -	Plumbing, Plumbing Piping, Plumbing Equipment.
Division 26 -	Electrical, Instrumentation and Control for Electrical Systems.
Division 33 -	Utilities, Water Utilities, Water Utility Distribution Piping, Water Utility Distribution Equipment, Water Utility Pumping Stations, Wells.
Division 44 -	Pollution and Waste Control Equipment, Water Pollution Control Equipment.