ELECTRIC SYSTEM 777 SERVICE MANUAL
3-18 Published 10-01-2012, Control # 045-08
Swing Pump Control (Servo Driver 6) 85A C-24 AO-S6
0 to 2.8 ± 10% (110 Ma ± 10%) VDC Right;
0 to -2.8 ± 10% (-110 Ma ± 10%) VDC Left
I/O 3 J10-42
Swing Park Switch/Holding Brake 89B2 D-15 DI-44 12 VDC Nominal (when brake is applied) I/O 4 J12-08
Swing Right Pressure (Pump 3A) 85QR A-25 AI-22 1 VDC at No Pressure; 1.2 VDC at 300 PSI CPU J3-59
Swing/Travel Alarms 25X C-27 DO-13 12 VDC Nominal I/O 2 J8-25-26
System Fault Alarms 25 C-29 DO-15 12 VDC Nominal I/O 2 J8-29-30
System Ground 0 C-02 — 0 VDC
System Ground 0 C-04 — 0 VDC
System Ground 0 C-13 — 0 VDC
System Ground 0 C-22 — 0 VDC
System Ground 0 C-31 — 0 VDC
Track Motor (2-Speed) 88R D-31 DO-26 12 VDC Nominal I/O 3 J10-31-32
Travel Detent 89X B-01 DI-1 12 VDC Nominal I/O 1 J6-07
Travel Park Disc Brake Switch 89B4 D-11 DI-40 12 VDC Nominal (when brake is applied) I/O 3 J10-18
Travel Parking Brake 84E C-10 DO-4 12 VDC Nominal I/O 1 J6-27-28
Travel Pressure Left Track 84Q E-09 AI-37 1.2 VDC at 300 PSI; 1 VDC at No Pressure I/O 2 J9-58
Travel Pressure Right Track 83Q E-08 AI-36 1.2 VDC at 300 PSI; 1 VDC at No Pressure I/O 2 J9-56
Description Wire # Pin # I/O #
Test Voltage
(DC unless otherwise specified)
Connection
(Signal Type)
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