Manitowoc Published 10-01-2012, Control # 045-08 3-11
777 SERVICE MANUAL ELECTRIC SYSTEM
3
81MB D-04 ECB2
Rear Drum Flange Direction Encoder
Channel B2
7.5 VDC Plus or 0 VDC Not Moving; 3.5 VDC Moving I/O 1 J6-04
81N D-28 DO-23 Rear Drum Rotation Indicator 12 VDC Nominal I/O 3 J10-25-26
81P A-04 AI-2 Rear Drum Handle (Handle 2)
0 VDC Neutral; 5 to 1.4 VDC Lower;
5 to 8.6 VDC Raise
I/O 1 J5-52
81Q C-19 DO-9 Rear Drum Disc Brake Solenoid 12 VDC Nominal I/O 1 J6-37-38
81QS A-23 AI-20 Rear Drum System Pressure (Pump 1A) 1 VDC at No Pressure; 1.2 VDC at 300 PSI CPU J3-55
81S D-25 AO-2
Rear Drum Motor Control Right and Left
Side
0 VDC Up to 1/3 Handle Movement;
0.96 to 2.19 VDC 1/3 to Full Handle Movement
I/O 2 J8-06
82MALS E-22 DI-54 Boom Left Cylinder Encoder Channel A8 7.5 VDC Plus or 0 VDC Not Moving; 3.5 VDC Moving I/O 4 J12-18
82MARS E-20 DI-52 Boom Right Cylinder Encoder Channel A7 7.5 VDC Plus or 0 VDC Not Moving; 3.5 VDC Moving I/O 4 J12-16
82MBLS E-23 DI-55 Boom Left Cylinder Encoder Channel B8 7.5 VDC Plus or 0 VDC Not Moving; 3.5 VDC Moving I/O 4 J12-19
82MBRS E-21 DI-53 Boom Right Cylinder Encoder Channel B7 7.5 VDC Plus or 0 VDC Not Moving; 3.5 VDC Moving I/O 4 J12-17
82A C-14 AO-S3 Boom Cylinder Pump Control Servo Driver 3
0 to 2.8 ± 10% (110 Ma ± 10%) VDC Down;
0 to -2.8 ± 10% (-110 Ma ± 10%) VDC Up
I/O 2 J8-41
82BA A-20 AI-17 Boom Angle Indicator 1.88 VDC at 0°F; 8.7 VDC 82°F; 6.88 VDC at 60°F CPU J3-49
82ED C-11 DO-5 Boom Down Enable 12 VDC Nominal I/O 1 J6-29-30
82EU C-09 DO-3 Boom Up Enable 12 VDC Nominal I/O 1 J6-25-26
82N D-29 DO-24 Boom Cylinder Up/Down Indicator 12 VDC Nominal I/O 3 J10-27-28
82P A-05 AI-3 Boom Cylinder Handle (Handle 3)
0 VDC Neutral; 5 to 1.4 VDC Lower;
5 to 8.6 VDC Raise
I/O 1 J5-54
82QR A-28 AI-25 Boom Cylinder Retract Pressure 1 VDC at No Pressure; 1.2 VDC at 300 PSI CPU J3-50
82QS A-24 AI-21 Boom Cylinder Extend Pressure 1 VDC at No Pressure; 1.2 VDC at 300 PSI CPU J3-57
82R C-34 DO-18 Boom Pump Enable 12 VDC Nominal I/O 2 J8-35-36
83A C-15 AO-S4 Right Track Pump Control (Servo Driver 4)
0 to 2.8 ± 10% (110 Ma ± 10%) VDC Forward;
0 to -2.8 ± 10% (-110 Ma ± 10%) VDC Reverse
I/O 2 J8-42
83P A-06 AI-4 Right Track Handle (Handle 5)
0 VDC Neutral; 5 to 1.4 VDC Reverse;
5 to 8.6 VDC Forward
I/O 1 J5-56
83PF A-12 AI-9 Right Track Pedal 1
0 VDC Neutral; 5 to 1.4 VDC Reverse;
5 to 8.6 VDC Forward
I/O 2 J7-50
83Q E-08 AI-36 Travel Pressure Right Track 1.2 VDC at 300 PSI; 1 VDC at No Pressure I/O 2 J9-56
84A C-23 AO-S5 Left Track Pump Control (Servo Driver 5)
0 to 2.8 ± 10% (110 Ma ± 10%) VDC Reverse;
0 to -2.8 ± 10% (-110 Ma ± 10%) VDC Forward
I/O 3 J10-41
84E C-10 DO-4 Travel Parking Brake 12 VDC Nominal I/O 1 J6-27-28
84P A-07 AI-5 Left Track Handle (Handle 6)
0 VDC Neutral; 5 to 1.4 VDC Reverse;
5 to 8.6 VDC Forward
I/O 1 J5-58
84PF A-13 AI-10 Left Track Pedal 2
0 VDC Neutral; 5 to 1.4 VDC Reverse;
5 to 8.6 VDC Forward
I/O 2 J7-52
84Q E-09 AI-37 Travel Pressure Left Track 1.2 VDC at 300 PSI; 1 VDC at No Pressure I/O 2 J9-58
85A C-24 AO-S6 Swing Pump Control (Servo Driver 6)
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
85P A-08 AI-6 Swing Handle (Handle 4)
0 VDC Neutral; 5 to 1.4 VDC Right,
5 to 8.6 VDC Left
I/O 1 J5-60
85QL A-26 AI-23 Swing Left Pressure (Pump 3B) 1 VDC at No Pressure; 1.2 VDC at 300 PSI CPU J3-61
85QR A-25 AI-22 Swing Right Pressure (Pump 3A) 1 VDC at No Pressure; 1.2 VDC at 300 PSI CPU J3-59
86P A-09 AI-7 Auxiliary Drum Handle (Handle 7)
0 VDC Neutral; 5 to 1.4 VDC Lower;
5 to 8.6 VDC Raise
I/O 1 J5-62
86QS A-27 AI-24 Aux. Drum System Pressure (Pump 10A) 1 VDC at No Pressure; 1.2 VDC at 300 PSI CPU J3-63
87MA E-01 ECA4 Auxiliary Drum Speed Encoder Channel A4 7.5 VDC Plus or 0 VDC Not Moving; 3.5 VDC Moving I/O 2 J8-03
87MB E-02 ECB4 Aux. Drum Direction Encoder Channel B4 7.5 VDC Plus or 0 VDC Not Moving; 3.5 VDC Moving I/O 2 J8-04
87A E-36 DO-36 Auxiliary Drum Pump Control Up 0 to 2.8 VDC Engine On; 0 to 2.4 VDC Engine Off I/O 4 J12-31-32
Wire # Pin # I/O # Description
Test Voltage
(DC unless otherwise specified)
Connection
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