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LF-72/74
F-18 F-18
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TROUBLESHOOTING AND REPAIR
WIRE DRIVE MOTOR AND GEAR BOX REMOVAL AND REPLACEMENT
PROCEDURE
(Continued)
Figure F.7 - Wire Drive Motor(s)
PROCEDURE
1. Remove th input power from the
LF72/LF72 unit.
2. Remove the gun from the unit.
3. Using the 5/16 nut driver remove the 5
screws holding the cover.
4. Using the Phillips head screw driver
remove the #67 electrode sense lead
from the connection block.
5. Using the pliers remove the gas hose
from the connection block. Be careful
not to damage the hose.
6. Using the 3/4 inch wrench remove the
electrode cable from the connector
block.
7. Remove the tach and motor leads by
disconnecting the P10 connector. See
wiring diagram.
8. Using the 7/16 inch socket wrench and
extension remove the six mounting
bolts. See figure F.7. The motor, and
gear box assembly can now be
removed from the LF72/LF74 unit.
O-RING
MOUNTING SCREWS*
SECURING WIRE DRIVE PANEL
MOUNTING SCREWS *
SECURING WIRE DRIVE PANEL
INCOMING
BUSHING
BALL
BUSHING
ASSEMBLY
*REMOVE 6 MOUNTING SCREWS
SET SCREW
MOUNTING BOLTS