Lincoln Electric SVM153-A service manual Refer to Figure F.32 Turn the engine off

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F-71	F-71
	TROUBLESHOOTING & REPAIR

OUTPUT RECTIFIER BRIDGE DIODE REMOVAL AND

REMOVAL AND REPLACEMENT (CONTINUED)

FIGURE F.32 – POWER MODULE/OUTPUT RECTIFIER BRIDGE ASSEMBLY DETAILS

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DIODE

DIODE

PIGTAIL

LEADS

PROCEDURE

Refer to Figure F.32.

1.Turn the engine off.

2.Perform the Output Panel Removal as described in the Case Cover Removal pro- cedure.

3.Perform the Power Module Capacitor Discharge procedure.

4.Using the 7/16" wrench, remove the appro- priate stator leads and diode pigtail lead from the stud on the output rectifier bridge glastic insulator bracket. The bottom diodes require a 1/2" wrench to remove the double heavy leads.

HEATSINKS

Label the leads for reassembly if more than one is removed.

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 or fine steel wool 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.

COMMANDER 500