Manitowoc 777 Service And Maintenance Manual

Reference Only
ELECTRIC SYSTEM 777 SERVICE MANUAL
3-14 Published 10-01-2012, Control # 045-08
Description Identification
Description Wire # Pin # I/O #
Test Voltage
(DC unless otherwise specified)
Connection
(Signal Type)
10 VDC Regulated 87F A-01 — 10 VDC
10 VDC Regulated Monitor 87FM A-16 AI-13 5 VDC I/O 2 J7-58
12 VDC System 8P1 C-01 — 12 VDC Nominal
12 VDC System 8P1 C-03 — 12 VDC Nominal
12 VDC System 8P1 C-12 — 12 VDC Nominal
12 VDC System 8P1 C-21 — 12 VDC Nominal
12 VDC System 8P1 C-30 — 12 VDC Nominal
2nd Computer (Receive I/O) RX3 D-21 — CPU J4-10
2nd Computer (Transmit I/O) TX3 D-22 — CPU J4-09
Auxiliary Drum Direction Encoder
Channel B4
87MB E-02 ECB4 7.5 VDC Plus or 0 VDC Not Moving; 3.5 VDC Moving I/O 2 J8-04
Auxiliary Drum Disc Brake Park Switch 89C4 D-12 DI-41 12 VDC Nominal (when brake is applied) I/O 3 J10-19
Auxiliary Drum Disc Brake Solenoid 87E C-25 DO-11 12 VDC Nominal I/O 2 J8-21-22
Auxiliary Drum Handle (Handle 7) 86P A-09 AI-7
0 VDC Neutral; 5 to 1.4 VDC Lower;
5 to 8.6 VDC Raise
I/O 1 J5-62
Auxiliary Drum Maximum Bail Limit 89P1 D-14 DI-43 12 VDC Nominal (when brake is applied) I/O 4 J12-07
Auxiliary Drum Motor Control 87C E-30 AO-4
0 VDC Up to 1/3 Handle Movement;
0.96 to 2.19 VDC 1/3 to Full Handle Movement
I/O 4 J12-06
Auxiliary Drum Minimum Bail Limit 89Q1 D-13 DI-42 12 VDC Nominal (when brake is applied) I/O 3 J10-20
Auxiliary Drum Pump Control Down 87B E-37 DO-37 0 to 2.8 VDC Engine On; 0 to 2.4 VDC Engine Off I/O 4 J12-33-34
Auxiliary Drum Pump Control Up 87A E-36 DO-36 0 to 2.8 VDC Engine On; 0 to 2.4 VDC Engine Off I/O 4 J12-31-32
Auxiliary Drum Pawl In 89T1 B-32 DI-32 12 VDC Nominal I/O 3 J10-10
Auxiliary Drum Rotation Indicator 87N D-30 DO-25 12 VDC Nominal I/O 3 J10-29-30
Auxiliary Drum Speed Encoder Channel A4 87MA E-01 ECA4 7.5 VDC Plus or 0 VDC Not Moving; 3.5 VDC Moving I/O 2 J8-03
Auxiliary Drum System Pressure Pump 10A 86QS A-27 AI-24 1 VDC at No Pressure; 1.2 VDC at 300 PSI CPU J3-63
Battery Voltage 8TA A-14 AI-11 6.5 VDC at 13 VDC I/O 2 J7-54
Block Up Limit 89W B-06 DI-6 10 VDC Nominal I/O 1 J6-12
Boom Angle Indicator 82BA A-20 AI-17 1.88 VDC at 0°, 8.7 VDC 82°, 6.88 VDC at 60° CPU J3-49
Boom Cylinder Extend Pressure 82QS A-24 AI-21 1 VDC at No Pressure; 1.2 VDC at 300 PSI CPU J3-57
Boom Cylinder Handle (Handle 3) 82P A-05 AI-3
0 VDC Neutral; 5 to 1.4 VDC Lower;
5 to 8.6 VDC Raise
I/O 1 J5-54
Boom Cylinder Hold 89ZK E-18 DI-50 12 VDC Nominal I/O 4 J12-14
Boom Cylinder Pump Control
(Servo Driver 3)
82A C-14 AO-S3
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
Boom Cylinder Retract Pressure 82QR A-28 AI-25 1 VDC at No Pressure; 1.2 VDC at 300 PSI CPU J3-50
Boom Down Enable 82ED C-11 DO-5 12 VDC Nominal I/O 1 J6-29-30
Boom Cylinder Up/Down Indicator 82N D-29 DO-24 12 VDC Nominal I/O 3 J10-27-28
Boom Cylinder Enable 89A4 D-10 DI-39 12 VDC Nominal (when brake is applied) I/O 3 J10-17
Boom Left Cylinder Encoder Channel A8 82MALS E-22 DI-54 7.5 VDC Plus or 0 VDC Not Moving; 3.5 VDC Moving I/O 4 J12-18
Boom Left Cylinder Encoder Channel B8 82MBLS E-23 DI-55 7.5 VDC Plus or 0 VDC Not Moving; 3.5 VDC Moving I/O 4 J12-19
Boom Maximum Down Limit 89Q B-13 DI-13 12 VDC Nominal I/O 1 J6-19
Boom Maximum Up Limit 89R B-12 DI-12 12 VDC Nominal I/O 1 J6-18
Boom Pump Enable 82R C-34 DO-18 12 VDC Nominal I/O 2 J8-35-36
Boom Right Cylinder Encoder Channel A7 82MARS E-20 DI-52 7.5 VDC Plus or 0 VDC Not Moving; 3.5 VDC Moving I/O 4 J12-16
Boom Right Cylinder Encoder Channel B7 82MBRS E-21 DI-53 7.5 VDC Plus or 0 VDC Not Moving; 3.5 VDC Moving I/O 4 J12-17
Boom Up Enable 82EU C-09 DO-3 12 VDC Nominal I/O 1 J6-25-26
Cable Plug Insert NC C-37 Key
Cable Plug Insert NC D-23 Key Keyhole

Manitowoc 777 Specifications

General

Brand	Manitowoc
Model	777
Category	Construction Equipment
Language	English