Lincoln Electric SQUARE WAVE TIG 355 Service Manual page 134

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FAN MOTOR AND BLADE REMOVAL AND REPLACEMENT (continued)
FIGURE F.25 – FAN MOTOR AND BLADE MOUNTING DETAILS
PROCEDURE
The following procedure allows you to remove and
replace either of the two fans on the Square Wave
TIG 355.
1. Remove the input power to the machine.
2. With the 5/16" nutdriver, remove the case top
and sides.
3. Perform the Input Power Factor Capacitor
Voltage Check.
For Steps 4-11, refer to Figure F.25.
4. With the 1/4" nutdriver, loosen the fan blade
clamp and slide the blade from the motor shaft.
Note blade placement on the shaft for reassem-
bly.
5. With the 11/32" wrench, remove the nuts, lock
washers, and flat washers that mount the fan
motor to the fan bracket.
6. Cut any cable ties or wire leads.
TROUBLESHOOTING AND REPAIR
SQUARE WAVE TIG 355
7. Carefully remove the fan motor from the fan
bracket.
NOTE: You may have to loosen or remove the bot-
tom case back screws to gain enough
clearance to remove the motor.
8. Replacement: Mount the fan motor to the fan
bracket with the flat washers, lock washers, and
nuts removed earlier. Use the 11/32" wrench.
9. Slide the fan blade onto the fan motor shaft.
Note its proper placement. With the 1/4" nut-
driver, tighten the fan blade clamp.
10. Splice or resolder any wires cut during
removal. Insulate connectors. Replace cable
ties as necessary.
11. With the 5/16" nutdriver, install the case top
and sides.
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