Lincoln Electric SVM 106-A service manual Wire Drive Assembly and Components Replacement

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F-38 TROUBLESHOOTING AND REPAIR

WIRE DRIVE ASSEMBLY AND COMPONENTS REPLACEMENT (continued)

FIGURE F.12 – MOTOR LEAD REMOVAL.

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MOTOR

GROUND LEAD

539(W) 541(B)

REPAIR PROCEDURE

1.Remove the cover from the control by removing the four 5/16 in. screws from the top and side of the unit.

2.Cut the two tie wraps securing the feed motor leads to the main wire harness and disconnect the two motor leads from terminals #539 and #541 on the control PC board. Refer to Figure F.12.

3.Remove the hex nut securing the motor ground lead to the case of the control box. Refer to Figure F.12. Remove the motor ground lead and reinstall the hex nut. Do not remove the second ground wire from the terminal. Feed the three motor leads through the case of the control box to the wire drive compartment.

4.Remove the swing arm assembly per the Swing Arm Assembly Replacement procedure.

5.Remove the hex head bolt in the bottom of the control box which holds the wire drive assembly to the case. Remove the two hex head bolts in the bottom of the wire drive compartment. On the four-roll feeders, these bolts also have flat washers and lockwashers.

6.Remove the straight head screw that secures lead #567 to the contact block. See Figure F.13.

7.Remove the wire drive assembly from the wire feeder.

8.On two-roll feeders, remove the two hex head bolts, lockwashers, and flat washers that secure the contact block to the wire drive assembly. Remove the contact block, and locator bushing. On four-roll wire feeders, remove the hex head bolt, lockwashers, and flat washer. Remove the hex nut, lockwasher, and flat washer from the bent J-bolt. Remove the contact block, locator bushing, and bent J-bolt.

LN-7 GMA WIRE FEEDER