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CITY OF SANTA ANA RFP NO.: 21-059 WATER WELL, PUMP AND MOTOR REHABILITATION AND REPAIR SERVICES and surge comparison test as received. The City shall be notified if acceptable criteria are not met. ff. Motor Disassembly I. Completely disassemble motor and steam clean all mechanical parts using a mild detergent compatible with winding insulation; thoroughly rinse; bake dry. 2. Disassembly documentation shall include the cause of failure and/or conditions contributing to failure, Ill. Motor Inspection 1. Visually inspect coils and windings for excessive wear, signs of conductor overheating or fatigue that possibly would not be apparent during an electrical test. 2. All stators shall be surge- tested with an electronic surge tester specifically designed to apply a surge voltage stress test simultaneously between turns of a coil, between phases, from winding to ground and to detect short-circuited turns in winding under test. Testing shall be per EASA, IEEE 62.2, 112 and 7.2.3 standards. Infrared imaging shall be provided pre and post test. Iv. Mechanical Fit 1, Measure the bearing bores, shells, housings and shaft journals using a micrometer. Shaft fits and housing fits shall comply with AR100-2020. Machine work shall be approved by the Project Manager before being performed or machine work may not be paid for, Bearing journals, seal surfaces and bearing housing restoration shall be done by metalizing and machining or boring and sleeving, Documentation of before and after measurements shall be made. 2: Replace bearings per manufacturer's specifications. All grease fittings, plugs, etc, shall be replaced unless otherwise indicated by the Project Manager. Bearings shall be properly lubricated and bearing oil reservoirs shall drained for shipping and installation. The Contractor shall be responsible for filling the bearing oil reservoir upon installation. All equipment shall be tagged with information as to whether or not bearing oil reservoirs were filled and what type of lubricant was used. v. Rotor Balancing 1. All rotors of motors rated at 50 HP/3600/1800 RPM and above shall be dynamically balanced, with the rotor running at rated speed where practical, but not less than 600 RPM in the balance stand. The balancing speed shall also be rapid enough so the balance machine sensitivity can reliably measure the maximum allowable residual unbalance. 2, A printout tape from the balance/analyzer shall be furnished detailing the final balance values. This tape will be attached to the recondition/repair/rewind documents when the motor is delivered. vi. Motor Leads Motor leads shall be permanently tagged with non-magnetic markers. Motor lead configuration shall not be altered. vll. Insulation 1. Windings shall be double -dipped with Class H varnish and baked, 2. Machine finished surfaces bore of the stator lamination and periphery of the rotor laminations shall be cleaned of all varnish and foreign materials. Photo documentation of this process shall be made prior to and after lamination. Vitt. Final Test 1. A 1000 volt meg-ohm meter shall be used to verify insulation continuity. This reading shall be 100 Meg -ohms or greater and documented. After reassembly, motor shall be test -run at rated