TOC

F-62

TROUBLESHOOTING AND REPAIR

F-62

OUTPUT CONTROL UNIT (VARIABLE REACTOR)

INSPECTION AND SERVICE PROCEDURE (continued)

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PROCEDURE

Servicing the rotating brush holder and output stud assembly:

Thoroughly clean and inspect the rotating brush holder assembly and the output stud assembly.

10.Examine the insulators on both assemblies. See Figure F.21. Replace any that are worn, damaged or missing. If the shaft insulation tube requires replacement, position the shaft and tube per Figure F.22, and torque the two 5/16-18 Hex head screws to 8 Ft-Lbs.

11.Disassemble the output stud assembly and check the insulating washers and tube. Replace them if they are damaged or worn and re-assemble the output stud assembly. See Figure F.21

12.Check for grounded output stud and brush holder assemblies by measuring the resistance as fol- lows:

From the steel shaft to the rotating brush holder

From the copper output stud to the output stud bracket

The resistance should be very high, 500,000 (500k) Ohms min.

If any of the contacts on the brush holder assembly are damaged, install all new contacts and new springs.

13.Assemble the flat washer, spring clip, and coil spring to the shaft. See figure F.21

14.Apply a thin layer of grease to both the output stud and the inside of the brush holder that mates to the output stud. Grease should also be applied to the area around the hole where the shaft passes through the front panel.

15.Insert the brush holder and output stud assembly through the output control unit and through the hole in the front panel. Be sure the output stud bracket is positioned correctly. The insulated stop should be on the left when facing the back on the output control unit.

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FIGURE F.21 – INSULATOR & SPRING LOCATIONS

 

Steel

Coil

Insulator

Contacts

Output

Shaft

Spring

Tube

Stud

Springs

 

 

 

Insulator

 

 

 

(Short Insulator Tube Not Shown)

Spring

Flat

Brush

 

Holder

Output

Clip

Washer

 

Stud

 

 

 

Bracket

SAE-400 SEVERE DUTY

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Image 102
Lincoln Electric SVM187-A service manual Steel Coil Insulator Contacts

SVM187-A specifications

The Lincoln Electric SVM187-A is a cutting-edge welding machine designed for professional welders and industrial applications. Known for its reliability and performance, it stands out in the competitive welding equipment market. This versatile machine is structured to handle various welding processes, making it a popular choice among users.

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