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C"Ti'1",,O SANTA ANA RYP NO;: 16-090 WATER'h'ELL,, PUMP AND MOTOR REPAIR SERVICE'S 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 surHe 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 52.2,-11.2 and 7.2.3 standards. Infrared Imaging shall be provided, pre aped post test, d. Mechanical Fit 1. Measure the bearing bores, shells, housings and shaft journals using a micrometer. Shaft fits and housing fits shall comply with ARI DO -2'015. Machine work shall be approved by the, Engineer before being performed or machine work may not be pard for, gearing journals, sea[ 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 Engineer, Bearings shall be properly lubricated and bearing o.il 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, e. Rotor Balancing 1. All rotors of motors rated at 50 HP/360011800 RPM and above shall be dynamically balanced, with the rotor running at rated speed where practical, but not less than 600 RPM In the batanoe 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 balanoefanalyzer shall be furnished detailing the final balance values. This tape will be attached to the recondition/repair/rewind documents when the motor is delivered. f. Motor t.eads Motor leads shall be permanently tagged: with non-magnatic .markers, Motor lead configuration shall not be altered. g. Insulation 1, windings shall. be double -dipped with Class kt varnish and baked. 2, Maohine-finished surfaces bore of .thp 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, h.. Final Test 1. A 1000 volt meg-ohm meter shalt be used to verify insulation continuity. This reading shall be documented. After reassembly, motor shall be test -run at rated voltage and frequency. No load voltage and phase currents shall be recorded. Vibration mils displacement shall be measured and recorded in the horizontal, vertical and axial planes on both ends of the motor, or top and bottom of vertical motors and documentation of current reading and vibration readings shall be provided to the Engineer. 2. A 5KV meg-ohm meter shall be used to verify insulation continuity of all 4160V motors. I. Paint 1. Exterior of motor shalt be properly cleaned of rust and foreign material, prime painted and finish painted with a good grade of machinery enamel, the same color as received unless otherwise specified. Nameplates, machined surfaces and internal parts shall be protected from paint.