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2.5 SCR INSTALLATION SPECIFICATIONS
2.5.1 SCR TIGHTENING PROCEDURE
2.5.1.1 Clean both heat sink and SCR surfaces.
2.5.1.2 Apply a thin layer of joint compound (Noalox) to both SCR surfaces.
2.5.1.3 Observe correct SCR polarity.
2.5.1.4 Install SCR so that roll pins engage dimples on both sides of the SCR.
2.5.1.5 Tighten clamp bolts evenly until finger-tight.
2.5.1.6 Tighten each bolt according to table below (based on number of spring bars and
size of bars).
* Note : SMALL clamps are 4.25 inches / 10.5 cm and LARGE clamps are 5 inches /
12.5 cm.
CLAMP SIZE
SPRING BARS BOLT TURNS PAST
SMALL
SMALL
LARGE
LARGE
PAGE 7
FINGER TIGHT
1
0.8
2
1
3
1.8
4
1.8
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