Komatsu 830E Shop Manual page 259

f. Reverse polarity of input. Jumper circuit 71 to terminal "C" and jumper circuit 710 to terminal
"A" at VMM1.
Verify negative value of output voltage measured in step e. and negative value on PTU
screen.
g. Remove jumpers and voltmeters. Restore all disconnected wiring.
12. MOTOR M2 ARMATURE VOLTS - VMM2: . . . . . . . motor 2 volts = 0.0
a. Repeat same test procedure used on alt output volts, except substitute VMM2 instead of
VMM1.
13. ALTERNATOR FIELD VOLTAGE - VDR3: . . . . . . . . alt field volts = 0.0
(Screen value volts = 10.6 x input volts).
a. Disconnect wires from VDR3 terminal "E" and "D".
b. Connect a 1.5 volt battery (i.e. flashlight battery) to wire removed from "E" (-) and to VDR3
terminal "D" (+).
c. Measure actual voltage of battery used in above step.
PTU screen should read actual test battery voltage x 10.6
Example:
If test battery voltage measures 1.550 volts, PTU screen should read 16.43 volts.
d. Remove test battery. Screen should read 0 volts.
e. Reconnect wires removed in step a.
MOTOR 1 TEMPERATURE . . . . . . . . . . . . motor 1 temp = 0.000 V; 0.0° C
NOTE: Motor Temperature monitoring system is optional.
a. Disconnect motor 1 temperature sensor wires 722C and 722A routed to wheel motor from
terminal board in control cabinet.
b. Connect a 100 ohm resistor to terminal board in place of wires removed in previous step to
simulate 0°C temperature signal into analog input card.
Screen value on PTU should read 1.96 ±.04 volts and 0.0° C.
c. Replace 100 ohm resistor with a 181 ohm resistor. (210°C)
Screen value on PTU should read 3.55 ±.07 volts and 210° C.
d. Remove resistor and replace sensor wires at terminal board.
E03012 2/02 Statex III Electrical Checkout Procedure E3-29