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5-4 Troubleshooting MN894
SCR Replacement
SCR Polarity Figure 5-2 shows the polarity and wire colors for correct SCR installation. It also shows
the locations of the tightening bars.
Figure 5-2 SCR Polarity
M160 / M250 M420 / M600 / M840
White wire to GT terminal,
Red wire to T terminal
White wire to GL terminal,
Red wire to L terminal
White wire to GL terminal,
Red wire to L terminal
White wire to GT terminal,
Red wire to T terminal
Tightening Bar
Tightening Bar
Tightening Bar
Tightening Bar
Terminals GT, T, GL and L.
Terminals GT, T, GL and L.
Gate (White wire)
Cathode (Red wire)
Cathode
Anode Cathode
Anode Cathode
AnodeCathode
AnodeCathode
SCR Pressure Gauge Figure 5-3 shows how the pressure gauge is used.
Figure 5-3 SCR Tightening Pressure Gauge
Calibration
VE3000
VE2500
VE1000
VE2000
VE3500
VE5500
3°
4°
Calibration
VE3000
VE2500
VE1000
VE2000
VE3500
VE5500
True Flat Surface Surface Deflection Measurement
3°
Tightening Bar
Tightening Bar
SCR Mounting Kit Number
Continued on next page.