Diode Assemblies
Multimeter
Red (+) Lead
Multimeter
Black (-) Lead
Resistance
DIODE
TERMINAL A
DIODE
TERMINAL B
VERY LOW
DIODE
TERMINAL B
DIODE
TERMINAL A
VERY HIGH
Two different diodes are used on the eTriFlex machines. The maximum current
allowed through any of the diodes is 6 amps. The diodes can be identified by
their black color and diode symbol on the end of the diode body.
g288593
Figure 88
1.
Main contactor diode
3.
Center cutting unit motor connectors
2.
Traction motor contactor diode
•
A diode assembly is used for circuit protection from voltage spikes that occur
when the main contactor is de−energized. The diode plugs into the machine
wire harness near the wire harness connectors for the center cutting unit
motor on the left side of the machine.
•
A diode assembly is used for circuit protection from voltage spikes that occur
when the traction motor contactor is de−energized. The diode plugs into the
machine wire harness near the wire harness connectors for the center cutting
unit motor on the left side of the machine.
Testing the Diode Assemblies
1. Locate and remove the diode from the wire harness. Check the diode and the
harness connector for damage or corrosion and clean or repair as necessary.
2. Use a multimeter to check for voltage drop across the diode terminals (diode
test setting). Contact the multimeter red (+) lead to diode terminal A and the
black (−) lead to diode terminal B. A reading of less than 0.7 volts should be
displayed on the multimeter.
OR
Use the table provided and a multimeter (ohms setting) to measure the
resistance across the diode terminals.
3. Replace the diode if necessary.
Greensmaster® eTriFlex 3360 and 3370
Page 5–99
Electrical System: Testing the Electrical Components
19239SL Rev B
