Évaluations - 3, GPA: 3.3
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Facilité d'utilisation
21). Remove acorn nut and washer. Back out locking pin and bushing and slide stator out. Axial key positions stator and crankcase. If necessary, heat crankcase motor housing (not over 20 to 30 F above stator temperature). Check stator for damage to windings and lead wires. Use a megohmmeter to check for grounds or shorts between windings. Motor Replacement STATOR AND ROTOR — Install stator halfway into housing. Insert the terminal leads first, guiding them to terminal plate opening as stator is being inserted. Replace ring spacer (Fig. 11, item 21) on crankshaft. Ease rotor onto shaft until it begins to feel snug. Insert rotor key, and push rotor the remainder of the way on shaft. Replace rotor lock bolt with lockwasher and plate washer. Push stator into housing until it lines up correctly with rotor (Fig. 22). Line up keyways in stator and crankcase and replace stator locking assembly, then drive key into keyway and stake over keyway in stator to secure key. When a new motor is being installed, the stator must be drilled and a new locking pin and motor lock bushing used (see Fig. 23 and instructions). Connect stator leads to proper terminals on terminal plate. Refasten terminal plate and junction box to compressor. Replace motor end bell using studs for support. Remove rubber plug (if used) from piston head. Replace valve plate assembly, cylinder head, and terminal plate assembly. Torque 12 bolts holding terminal plate to crankcase at 30 to 40 lb-ft. Do not push stator in completely until rotor is in place. DOWEL HOLES DOWEL HOLES DOWELS IN CYLINDER DECK FOR SUCTION VALVE AND BACKER SUCTION VALVE BACKER PLACE AGAINST CYLINDER DECK, UNDER SUCTION VALVE TOP VIEW OF PISTON IN CYLINDER Fig. 19 — Piston, Suction Valve and Backer Positions VALVE PLATE RUBBER PLUG STATOR LOCKING ASSEMBLY STATOR ROTOR ROTOR LOCK BOLT JACKSCREW LOCKING PIN BOSS STATOR KEY ACORN NUT WASHER LOCKING PIN MOTOR LOCK BUSHING Fig. 20 — Removing Rotor Fig. 21 — Removing Stator STATOR END TURN ROTOR END RING ROTOR CENTER LINE Fig. 22 — Motor Alignment STATOR END TURN ROTOR END RING ROTOR CENTER LINE Fig. 22 — Motor Alignment PEENED ENDS ACORN NUT BUSHING LOCKING PIN WASHER COMPRESSOR CASTING STATOR CORE 3/8" 2 1/16" Fig. 23 — Stator Locking Assembly Remove 1. Acorn nut and washer. 2. Back out locking pin and bushing. Replace 1. Screw in locking pin bushing until it rests on stator core. 2. Wrap a piece of tape around 3/8-in. drill bit, 21/16 in. from cutting edge. Before drilling, be sure stator vent holes do not line up with locking pin hole. Vent holes are drilled horizontally through stator, and can be seen from end bell side. 3. Ream out bushing (3/8-in. drill) and drill into stator core until tape is flush with top of bushing. (Remove drill chips.) Back off locking pin bushing 1/8 of a turn. 4. Tap locking pin into position. (Top of bushing should be approximately 1/16 in. above top of pin.) 5. Peen top of bushing over roll pin. 6. Replace washer and acorn nut. Motor Burnout (Clean-Up Procedure) — When a hermetic motor burns out, the stator winding decomposes forming carbon, water and acid which contaminate refrigerant systems. Remove these contaminants from system to prevent repeat motor failures. 1. Close compressor suction and discharge service valves, and bleed refrigerant from compressor. Save remaining refrigerant in system. 2. Remove burned motor from compressor, and drain compressor oil. Clean crankcase and motor housing with solvent. Ensure that all metal particles are wire-brushed free and removed. On severe burnouts, disassemble compressor heads and valve plate assemblies. Clean them in same manner as crankcase and motor housing. 3. Determine cause of burnout and remedy. Check control box for welded starter contacts, welded overload contacts or burned out heater elements. Check terminal plate for burned or damaged terminals, insulation, and shorted or grounded terminals. 4. Reassemble compressor with new stator and rotor. Install new liquid line filter drier, and place new oil charge in crankcase. 5. Evacuate and dehydrate compressor. Do not attempt start-up with terminal cover removed. Bodily injury or death may result from explosion and/or fire if power is supplied to compressor with the terminal cover removed or unsecured. See warning label on terminal cover. 6. Place compressor in operation. After 2 to 4 hours of operation, check compressor oil for discoloration and/or acidity. If oil shows signs of contamination, replace oil charge, filter driers, and clean suction strainer with solvent. 7. Check oil daily for discoloration and acidity. If oil stays clean and acid-free, the system is clean. If oil shows signs of contamination, change oil, filter drier, and clean suction strainer. If filter drier or suction strainer is dirty or discolored, repeat this step until system is clean. Condenser Maintenance (07E Units) — To inspect and clean condenser, drain water and remove condenser heads. To drain condenser, shut off water s...