Troubleshooting & repair, Scr removal and replacement procedure (continued) – Lincoln Electric IDEALARC CV-305 User Manual
Page 82
SCR REMOVAL AND REPLACEMENT PROCEDURE
(CONTINUED)
TROUBLESHOOTING & REPAIR
F-50
F-50
IDEALARC® CV-305
PROCEDURE
FOR
CLAMPING
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 nuts stationary,
turn the cap screws only with the following proce-
dure.
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 1/2 turn.
7.
Tighten second cap screw 1/4 turn.
8.
Assembly now has the proper clamping force.
9.
Perform
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
procedures.
2.
Tighten first cap screw 1/4 turn.
3
Tighten second cap screw 1/2 turn.
4.
Tighten the first cap screw 1/2 turn.
5.
Tighten the second cap screw 1/4 turn.
6.
Tighten the first cap screw 1/8 turn.
7.
Tighten the second cap screw 1/8 turn.
8.
Assembly now has the proper clamping force.
9.
Perform the