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F-50

F-50

TROUBLESHOOTING & REPAIR

SCR REMOVAL AND REPLACEMENT (continued)

FIGURE F.31 – HOUSING AND PRESSURE PAD FOR 5/8” WIDE LEAF SPRING

STEEL PRESSURE PAD

 

 

HOUSING

 

 

 

 

 

 

PROCEDURE FOR THE

 

FIGURE F.32 – CLAMP ASSEMBLY

5/8 INCH WIDE SPRING

 

 

 

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1.Place a piece of sleeving around each cap screw.

2.Insert cap screws through the leaf spring. The leaf spring is flat so the orientation of the leaf spring does not matter.

3.Place the steel pressure pad in the housing with the 1/8 inch wide standoff facing up. See Figure F.31.

4.Insert cap screws and leaf spring into plastic housing being sure that the steel pressure pad remains in position. Pressing on the cap screw heads should produce a rocking action of the spring in its housing.

5.Insert the clamp assembly through the heat sinks. Install nuts. Tighten the clamp nuts equally on the cap screws until finger tight. Be sure that the leaf spring is not cocked in the housing. See Figure F.32. Heat sinks may not be exactly as pictured.

6.Reinspect the SCR for proper seating.

HEX NUT

HEAT SINK

SCR

HEAT SINK

HOUSING LEAF SPRING

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CAP SCREW

IDEALARC R3R

Page 84
Image 84
Lincoln Electric R3R-300, R3R-500 service manual Procedure for, Inch Wide Spring