3–5Access Procedures
Publication 1336 IMPACT-6.8 – November, 2002
Component Torque N-mTorque in.-lbFastener Application
Thermostat Thermostat to heat sink 14 1.6
Bus Capacitor Holder Holder to Bus Capacitors 26 2.9
Capacitor Bus Bar Assembly Assembly to Bus Capacitors 50 5.6
Power Module Gate Interface Board Board to Power Modules 18 2.0
Power Module Bus Bar Bus Bar to Power Modules 90 10
Power Module Module to heat sink Refer to Figure 3.3
SCR and Diode SCR or Diode to heat sink Refer to Note 1
SCR and Diode Assembly Clamp nuts 240 27
SCR and Diode Assembly Heat sink to Back-up Plate 75 8.5
SCR and Diode Assembly Back-up Plate to Inverter Assembly 75 8.5
SCR and Diode Assembly U-shaped Bus Bar to Inverter Assembly 240 27
SCR and Diode Assembly Square Bus Bar Plate to Inverter Assembly 240 27
SCR and Diode Assembly HV Guard to SCR and Diode Assembly 26 2.9
Transitional Bus Bar Assembly Assembly to Power Module Bus Bar Assembly 80 9.0
Bus Fuse F1 – F3 Fuse to Transitional Bus Bar Assembly 240 27
DC Bus Inductor L1 Inductor to chassis 75 8.5
Bus Bar Cable Adaptor
Adaptor to Transitional Bus Bar Assembly and
DC Bus Inductor, right side of Motor Flex Bus
75 8.5
Converter Bus and Motor Bus Bars All connections 240 27
Wires (PE) Wires to Ground Stud 175 20
Wire (TE) Wire on Control Board Mounting Plate 26 2.9
Wires Wires to TB1 16 1.8
Wires Wires to TB2 7 0.8
Wires Wires to TB3 8 – 10 0.9 – 1.1
Power Cables Cables to terminals 240 27
Control, Gate Driver, Common Bus Precharge
Board Mounting Plates
Plates to chassis 26 2.9
Heat Sink Guard Guard to chassis 18 2.0
T-Bar Mounting Bolt T-Bar to Main Frame 240 27
Capacitor Mounting Bolt Capacitor Bank Assembly to Main Frame 240 27
Inverter Housing Assembly Lock-Down Bolt Inverter Housing Assembly to Main Frame 240 27
Wheel Chock Fasteners Wheel Chocks to tracks 75 8.5
Ground Cable Bolts Ground Cables from both assemblies to Main Frame 75 8.5
Converter Bay Fuses (F1, F1A, etc.) Fuse to bus 445 50
Converter Diodes Converter Diode to heat sink 50 5.6
Converter Bay Thermal Switches Thermal Switch to heat sink 16 1.8
Converter Bus Bars L-shaped Bus Bar to Diode and bus bar interconnections 90 10
Converter Fans Fan to heat sink 12 1.4
1
Refer to the gauge on the clamp, which indicates pounds of force. The reading should be 400 lbs.
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