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TM-499 Page 38
10-3. Test Points And Values (Use With Section 10-2)
Voltage Readings
a) Tolerance − ±10% unless specified
b) Condition − 70
°F (21°C); cold
machine (no warm-up); no load
c) Weld/power rpm unless specified
d) Reference − single arrow: reference
to circuit common (lead 11); double
arrow: reference to points indicated
e) Wiring Diagram − see Section 12
V1 122 volts ac ±5% (60 Hz)
110 volts ac ±5% (50 Hz)
V2 122 volts ac ±5% (60 Hz)
110 volts ac ±5% (50 Hz)
V3 76 volts ac (60 Hz)
69 volts ac (50 Hz)
V4 50 volts dc (60 Hz)
70 volts dc (50 Hz)
V5 At 25 volt, 100 ampere weld load:
Less than 1 volt dc (60 and 50 Hz)
V6 68 volts dc (60 Hz)
62 volts dc (50 Hz)
V7 0 − 10 volts dc (60 or 50 Hz)
V8 15 volts dc (60 or 50 Hz)
V9 23.5 volts ac (60 Hz)
20.5 volts ac (50 Hz)
V10 200 volts dc (60 Hz)
176 volts dc (50 Hz)
V11 18.2 volts ac (60 Hz) − Kohler Only
15.5 volts ac (50 Hz) − Kohler Only
Resistance Values
a) Tolerance − ±10% unless specified
b) Condition − 70
°F (21°C); cold
machine (no warm-up)
c) Wiring Diagram − see Section 12
d) Stop engine before checking
resistance
R1 27 ohms
R2 20 ohms (Kohler Only)
R3 thru R8 Less than 1 ohm
Amperage Readings
a) Tolerance − ±5% unless specified
b) Condition − 70
°F (21°C); cold
machine (no warm-up); no load
I1 1.8 amps dc (60 Hz)
2.3 amps dc (50 Hz)
Test Equipment Needed: