Troubleshooting & repair, Depress locking tab on mounting pin, 3/16" allen bolts – Lincoln Electric INVERTEC SVM158-A User Manual
Page 111
V350-PRO
TROUBLESHOOTING & REPAIR
F-61
F-61
FIGURE F.23. – 3/16” ALLEN BOLT LOCATION
FIGURE F.24. – NYLON MOUNTING PIN
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- +
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3/16" ALLEN BOLTS
MAIN SWITCH BOARD REMOVAL & REPLACEMENT (continued)
9. Using a 3/16” allen wrench remove four allen
bolts and washers as shown in Figure F.23.
At this point, the board is ready for removal.
Carefully remove the board from the 4 nylon
mounting pins. Note: Depress the retaining
pins on the sides of the nylon mounts to
release the board. See Figure F.24.
10. Carefully maneuver the board out of the
machine.
11. Apply a thin coat of Penetrox A-13 to the
IGBT heatsinks on the back of the new
switch boards mating surfaces. Note: Keep
compound away from the mounting holes.
12. Mount the new board on the nylon m o u n t -
ing pins.
13. Replace the four allen bolts and washers
previously removed.
14. Replace the eight capacitor terminal nuts,
washers, and necessary leads previously
removed.
15. Reconnect the three harness plugs previous-
ly removed.
16. Reconnect the nine leads (#201-#209) that
were previously removed.
17. Pre-torque all screws to 25 inch lbs. before
tightening to 44 inch lbs.
18. Replace the case wraparound cover.
DEPRESS
LOCKING TAB ON
MOUNTING PIN