Assessments - 3, GPA: 4.7
(
)
)
|
Facilidade de uso
7. Remove the nuts and flat washers from the capacitor terminals and remove the flat leads. 8. Remove the power module board. REPLACEMENT PROCEDURE 1. Apply Penetrox A-13 joint compound to the surface of the heat sink where the power module PC board mounts. 2. Install the three bolts, lock washers, and flat washers to mount the power module PC board to the heat sink. IMPORTANT: The top, long, bolt has a copper standoff on the opposite side of the board. Be sure to place this standoff between the heat sink and the PC board. 3. Install the top and bottom allen head cap screws. Torque the screws to 50-60 inch- pounds. 4. Install the leads, flat washers, and nuts to the capacitor. Torque the nuts to 50-60 inch- pounds. 5. Perform the Output Panel Replacement Procedure. 6. Install the case side(s). COMMANDER 300 Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOCReturn to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC F-93 F-93 TROUBLESHOOTING & REPAIR DIODE REMOVAL AND REPLACEMENT WARNING Service and repair should be performed by only Lincoln Electric factory trained personnel. Unauthorized repairs performed on this equipment may result in danger to the technician or machine operator and will invalidate your factory warranty. For your safety and to avoid electrical shock, please observe all safety notes and precautions detailed throughout this manual. If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, contact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call 1-800-833-9353 (WELD). TEST DESCRIPTION The following procedure will aid the technician in removing and replacing stud type diodes to the aluminum heat sinks on the Commander 300. MATERIALS NEEDED 7/16" Wrench 1" Open end wrench Penetrox A13 Loctite 271 “Slip” type torque wrench E2827-2 abrasive disc This procedure should take approximately 25 minutes to perform. COMMANDER 300 F-94 F-94 TROUBLESHOOTING & REPAIR DIODE REMOVAL AND REPLACEMENT (continued) FIGURE F.43 – POWER MODULE/OUTPUT RECTIFIER BRIDGE ASSEMBLY DETAILS Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOCReturn to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC HEATSINKS DIODE DIODE PIGTAIL LEADS TEST PROCEDURE 1. Turn the engine off. 2. Perform the Output Panel Removal Procedure. 3. Perform the Capacitor Discharge Procedure. 4. Using the 7/16" wrench, remove the appropriate stator leads and diode pigtail lead from the stud on the output rectifier bridge plastic insulator bracket. Label leads for reassembly if more than one is removed. See Figure F.43. 5. Using the 1" wrench, loosen the appropriate diode and remove the diode that is to be replaced. 6. Clean the area on the heat sink around the diode mounting surface using a putty knife or similar tool. DO NOT SCRATCH THE DIODE MOUNTING SURFACE. 7. Polish the heat sink's mounting surface using an abrasive disc, E2827-2 to provide a bright, clean surface where the diode seats on the heat sink. Wipe the surface clean with a lint- free cloth or paper towel. 8. Inspect the mounting surfaces of each new diode. Remove all burrs and wipe clean. Do not use steel wool or any abrasive cleanser on the diode mounting surface. 9. Apply a thin (0.003" to 0.007") uniform layer of Penetrox A13 joint compound to the heat sink mounting surface. 10. Do not apply compound to the diode stud or mounting threads. 11. Apply two drops of Loctite 271to the diode stud threads before tightening. NOTE: The diode threads must be clean and free of defects so that it can be finger tightened before applying torque. A “slip” type torque wrench must be used to tighten the diode. 12. Tighten the diode to the specifications in the following table. DIODE SIZE FOOT-POUNDS INCH-POUNDS 3/4 - 16 25-27 300-324 3/8 - 24 10±.5 125+0/-5 13. Connect the stator leads and diode pigtail leads as labeled at disassembly. 14. Replace the output panel. COMMANDER 300 Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOCReturn to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC F-95 F-95 TROUBLESHOOTING & REPAIR STATOR/ROTOR REMOVAL AND REPLACEMENT WARNING Service and repair should be performed by only Lincoln Electric factory trained personnel. Unauthorized repairs performed on this equipment may result in danger to the technician or machine operator and will invalidate your factory warranty. For your safety and to avoid electrical shock, please observe all safety notes and precautions detailed throughout this manual. If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, contact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call 1-800-833-9353 (WELD). TEST DESCRIPTION The following procedure w...