Lincoln Electric IDEALARC CV-305 - Manual (Page 80)

SCR REMOVAL AND REPLACEMENT PROCEDURE
(CONTINUED)
TROUBLESHOOTING & REPAIR F-48 F-48
IDEALARC® CV-305
CLAMPING PROCEDURE FOR 1/4-28
BOLTS.
Note: This procedure can only be used with 1/4-28
bolts.
Do not use bolts with any other type thread or new SCR
will be damaged.
Do not over tighten cap screws. The leaf spring will
apply the required clamping force to the SCR.
1. Do not turn the nuts. While holding the nuts sta-
tionary, turn the cap screws only with the following
procedure.
2. Tighten first cap screw 1/4 turn.
3. Tighten second cap screw 1/2 turn.
4. Tighten first cap screw 1/2 turn.
5. Tighten second cap screw 1/2 turn.
6. Tighten first cap screw 1/4 turn.
7. Assembly now has proper clamping force.
8. Perform the
Active SCR Test.
CLAMPING PROCEDURE FOR 1/4-20
BOLTS.
Note: This procedure can only be used with 1/4-20
bolts.
Do not use bolts with any other type thread or new
SCR will be damaged.
Do not over tighten cap screws. The leaf spring will
apply the required clamping force to the SCR.
1. Do not turn the nuts. While holding the nuts sta-
tionary, turn the cap screws only with the following
procedure.
2. Tighten first cap screw 1/4 turn.
3. Tighten second cap screw 1/2 turn.
4. Tighten first cap screw 1/2 turn.
5. Tighten second cap screw 1/4 turn.
STOP.
6. Assembly now has the proper clamping force.
7. Perform the
Active SCR Test.
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