Manitowoc 777 Service And Maintenance Manual

Reference Only
ELECTRIC SYSTEM 777 SERVICE MANUAL
3-12 Published 10-01-2012, Control # 045-08
87B E-37 DO-37 Auxiliary Drum Pump Control Down 0 to 2.8 VDC Engine On; 0 to 2.4 VDC Engine Off I/O 4 J12-33-34
87BA A-21 AI-18 Luffing Jib Angle Indicator 3.33 VDC at 0°F; 6.66 VDC 60°F; 7.88 VDC at 82°F CPU J3-51
87C E-30 AO-4 Auxiliary Drum Motor Control
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
87E C-25 DO-11 Auxiliary Drum Disc Brake Solenoid 12 VDC Nominal I/O 2 J8-21-22
87F A-01 — 10 VDC Regulated 10 VDC
87FM A-16 AI-13 10 VDC Regulated Monitor 5 VDC I/O 2 J7-58
87N D-30 DO-25 Auxiliary Drum Rotation Indicator 12 VDC Nominal I/O 3 J10-29-30
88R D-31 DO-26 Track Motor (2-Speed) 12 VDC Nominal I/O 3 J10-31-32
89A4 D-10 DI-39 Boom Cylinder Enable 12 VDC Nominal (when brake is applied) I/O 3 J10-17
89B2 D-15 DI-44 Swing Park Switch/Holding Brake 12 VDC Nominal (when brake is applied) I/O 4 J12-08
89B4 D-11 DI-40 Travel Park Disc Brake Switch 12 VDC Nominal (when brake is applied) I/O 3 J10-18
89C4 D-12 DI-41 Auxiliary Drum Disc Brake Park Switch 12 VDC Nominal (when brake is applied) I/O 3 J10-19
89D4 E-13 DI-45 Hydraulic Filter Alarm 1 12 VDC Nominal (when filter bypassing) I/O 4 J12-09
89E4 E-14 DI-46 Hydraulic Filter Alarm 2 12 VDC Nominal (when filter bypassing) I/O 4 J12-10
89F4 E-15 DI-47 Hydraulic Filter Alarm 3 12 VDC Nominal (when filter bypassing) I/O 4 J12-11
89G4 E-16 DI-48 Hydraulic Filter Alarm 4 12 VDC Nominal (when filter bypassing) I/O 4 J12-12
89H4 E-17 DI-49 Hydraulic Filter Alarm 5 12 VDC Nominal (when strainer is clean) I/O 4 J12-13
89J B-26 DI-26 Display Scroll Up 12 VDC Nominal I/O 2 J8-18
89K B-33 DI-33 Display Scroll Down 12 VDC Nominal I/O 3 J10-11
89L B-25 DI-25 Limit Bypass 12 VDC Nominal I/O 2 J8-17
89L1 B-35 DI-35 High Speed Travel Switch 12 VDC Nominal I/O 3 J10-13
89L3 B-29 DI-29 Front Drum Pawl In 12 VDC Nominal I/O 3 J10-07
89M B-23 DI-23 Front Drum Free Fall Enable 12 VDC Nominal I/O 2 J8-15
89M3 B-30 DI-30 Rear Drum Pawl In 12 VDC Nominal I/O 3 J10-08
89P B-24 DI-24 Rated Capacity Indicator/Limiter 12 VDC Nominal I/O 2 J8-16
89Q B-13 DI-13 Boom Maximum Down Limit 12 VDC Nominal I/O 1 J6-19
89Q1 D-13 DI-42 Auxiliary Drum Minimum Bail Limit 12 VDC Nominal (when brake is applied) I/O 3 J10-20
89Q3 B-34 DI-34 Seat Switch 12 VDC Nominal I/O 3 J10-12
89R B-12 DI-12 Boom Maximum Up Limit 12 VDC Nominal I/O 1 J6-18
89R1 D-14 DI-43 Auxiliary Drum Maximum Bail Limit 12 VDC Nominal (when brake is applied) I/O 4 J12-07
89R3 B-16 DI-16 Hydraulic Fluid Level 0 VDC Low Level; 12 VDC High Level I/O 2 J8-08
89S B-08 DI-8 Rear Drum Minimum Bail Limit 12 VDC Nominal I/O 1 J6-14
89S1 B-15 DI-15 Luffing Jib Maximum Down Limit 10 VDC Nominal I/O 2 J8-07
89S2 B-09 DI-9 Crane Mode Select 12 VDC Nominal I/O 1 J6-15
89S3 B-17 DI-17 Hydraulic Fluid Temperature 0 VDC above 180°F; 12 VDC below 180°F I/O 2 J8-09
89T B-03 DI-3 Front Drum Minimum Bail Limit 12 VDC Nominal I/O 1 J6-09
89T1 B-32 DI-32 Auxiliary Drum Pawl In 12 VDC Nominal I/O 3 J10-10
89T2 B-10 DI-10 Crane Mode Confirm 12 VDC Nominal I/O 1 J6-16
89T3 B-18 DI-18 Engine Oil Pressure 8 PSI (switch on) I/O 2 J8-10
89U B-07 DI-7 Rear Drum Maximum Bail Limit 12 VDC Nominal I/O 1 J6-13
89U3 B-19 DI-19 Engine Coolant Temperature 0 VDC below 210°F; 12 VDC above 210°F I/O 2 J8-11
89V B-02 DI-2 Front Drum Maximum Bail Limit 12 VDC Nominal I/O 1 J6-08
89W B-06 DI-6 Block Up Limit 10 VDC Nominal I/O 1 J6-12
89W1 B-14 DI-14 Luffing Jib Maximum Up Limit 10 VDC Nominal I/O 1 J6-20
89X B-01 DI-1 Travel Detent 12 VDC Nominal I/O 1 J6-07
89X2 B-21 DI-21 Rear Drum Free Fall Enable 12 VDC Nominal I/O 2 J8-13
89Y3 D-08 DI-37 Front Drum Disc Brake Park Switch 12 VDC Nominal (when brake is applied) I/O 3 J10-15
Wire # Pin # I/O # Description
Test Voltage
(DC unless otherwise specified)
Connection

Manitowoc 777 Specifications

General

Brand	Manitowoc
Model	777
Category	Construction Equipment
Language	English