2. Ransomes
  3. 62800, 62801, 62802, 62803, 62804, 62805, 62825, 62826

Ransomes 62800, 62801, 62802, 62803, 62804, 62805, 62825, 62826 User manual

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4
4271491-Rev B 4-1
Chapter 4
Electrical
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
Test and Adjustment Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
Repair Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
Component Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
J79 Interface Connector Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8
Main Harness Splice Identification and Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9
Theory and Diagnostic Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10
Electrical Component Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10
Electrical Schematic Component Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-13
Reel Motor Connector Pin Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-15
Electrical Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-16
Theory of Operation and Sub-Circuit Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-29
Horn and Work Light Circuit—Theory of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-29
Horn and Work Light Circuit Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-30
Diesel Engine Circuit—Theory of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-32
Diesel Engine Circuit Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-34
Gasoline Engine Circuit—Theory of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-38
Gasoline Engine Circuit Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-39
Raise/Lower Circuit—Theory of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-42
Raise Circuit Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-44
Lower Circuit Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-47
Mow Circuit—Theory of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-50
Mow Circuit Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-51
Traction Circuit—Theory of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-55
Traction Circuit Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-57
Steering Circuit—Theory of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-63
Steering Circuit Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-65
Genset Circuit—Theory of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-68
Genset Circuit Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-69
4-2 4271491-Rev B
ELECTRICAL
4
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-73
LCD Display Maintenance Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-73
Basic CAN System Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-86
System Diagnostic Trouble Codes (DTC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-94
Reel Control Unit Diagnostic Trouble Codes (DTC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-96
Traction Control Unit Diagnostic Trouble Codes (DTC) . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-104
3WD Traction Control Unit Diagnostic Trouble Codes (DTC) . . . . . . . . . . . . . . . . . . . . . . 4-108
Steering Control Unit Diagnostic Trouble Codes (DTC) . . . . . . . . . . . . . . . . . . . . . . . . . . 4-114
Overvoltage Limit Monitor (OLM) Diagnostic Trouble Codes (DTC) . . . . . . . . . . . . . . . . . 4-121
Generator Control Unit Diagnostic Trouble Codes (DTC) . . . . . . . . . . . . . . . . . . . . . . . . . 4-124
Power Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-127
Horn Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-128
Work Light Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-128
Glow Plug Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-128
Start Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-129
Charging Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-129
Raise/Lower Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-130
Mow Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-131
Component Tests and Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-132
Electrical System and Component Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-132
Circuit Breakers Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-133
150A and 300A Fuses Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-133
Accessory Socket Fuse Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-134
CAN Termination Resistor Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-134
Fan Relay Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-134
Key Switch Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-135
Mow Switch Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-135
Rocker Switches Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-137
Raise/Lower Switch Assembly Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-138
Seat Switch Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-139
Brake Pedal Switch Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-140
Brake Coil Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-140
Fuel Shu
toff Solenoid Test (Diesel) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-140
Fuel Shutoff Solenoid Test (Gasoline Models) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-141
Throttle Actuator Test (Diesel Models) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-141
Throttle Actuator Test (Gasoline Models) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-142
Traction Pedal Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-143
Steering Sensor (2WD) Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-144
Steering Sensor (3WD) Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-145
ELECTRICAL
4271491-Rev B 4-3
4
Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-147
Electrical Connectors Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-147
MCU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-148
PDU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-149
TCU Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-151
TCU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-152
SCU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-153
RCU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-154
GCU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-155
BRC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-156
3WD Traction Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-156
Steering Sensor (2WD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-157
Steering Sensor (3WD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-160
Steering Wheel Input Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-163
Resistor Bank Assembly and Jumper Harness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-165
Circuit Breakers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-166
Contactors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-167
Fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-169
Fan Relay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-170
48-Volt Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-170
Instrument Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-171
LCD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-172
Rocker Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-172
Key Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-173
Raise/Lower Switch Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-173
12 VDC Accessory Plug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-174
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-175
Brake Pedal Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-175
Brake Pedal Position Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-176
Engine Oil Pressure Switch (Diesel) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-177
Engine Temperature Switch (Diesel) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-177
Traction Pedal Position Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-178
Rectifier Repair Kit (Gasoline and Diesel Models) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-179
Fuel Level Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-181
AC Traction Motor Assembly
(Front Axle) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-181
AC Traction Motor (3WD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-182
Brake Coil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-184
Sensor Bearing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-185
Steering Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-18
6
4-4 4271491-Rev B
ELECTRICAL
4
Specifications
Test and Adjustment Specifications
Specification
120-Ohm Resistor Connector Resistance
at 68° F (20° C)
ohms 120 ± 10%
Resistance Across Brake Coil
at 68° F (20° C)
ohms 25.5 ± 10%
Resistance Across Fuel Shutoff Pull-In Coil
at 68° F (20° C) (Diesel Models)
ohms 0.5 ± 10%
Resistance Across Fuel Shutoff Hold-In Coil
at 68° F (20° C) (Diesel Modes)
ohms 10 ± 10%
Resistance Across Fuel Shutoff Coil
at 68° F (20° C) (Gasoline Models)
ohms 40 ± 10%
Resistance Across Throttle Actuator Coil
at 68° F (20° C) (Diesel Models)
ohms 4.55 ± 10%
Resistance Across Throttle Actuator Coil
at 68° F (20° C) (Gasoline Models)
ohms 4.55 ± 10%
Traction Pedal Adjustment Voltage
volts 4.2–4.7
Steering Sensor Position Adjustment (2WD)— Top of
Sensor Bracket-to-Top of Steering Controller Bracket
in. (mm) 1.63 (41.5)
Steering Sensor Air Gap Adjustment (3WD)
in. (mm) 0.125–0.188 (3.2–5.8)
ELECTRICAL
4271491-Rev B 4-5
4
Repair Specifications
Specification
PDU 12 Volt POS Connector Nut (5 and 7) Torque
(See page 4-148.)
lb-ft (N·m) 12.5 (16.9)
PDU 48 VDC BAT POS Connector Nut (6) Torque
(See page 4-148.)
lb-in. (N·m) 80 (9)
PDU 48 VDC BAT Generator Connector Nut (8)
Torque (See page 4-148.)
lb-in. (N·m) 80 (9)
PDU Flange Nut (11) Torque (See page 4-150.)
lb-ft (N·m) 12.5 (16.9)
PDU Flange Nut (12) Torque (See page 4-150.)
lb-in. (N·m) 40 (4.5)
PDU Flange Nut (17) Torque (See page 4-150.)
lb-in. (N·m) 40 (4.5)
PDU Flange Nut (18) Torque (See page 4-150.)
lb-in. (N·m) 80 (9)
TCU Wire Connection Nut Torque
lb-ft (N·m) 11 (14.9)
SCU Wire Connection Screw Torque
lb-in. (N·m) 53 (6)
3WD Traction Controller Wire Connection Screw
Torque
lb-in. (N·m) 53 (6)
Contactor Nut (4) Torque (See page 4-167.)
lb-in. (N·m) 35 (4)
Contactor Nut (5) Torque (See page 4-167.)
lb-in. (N·m) 15 (1.7)
Fuse Mounting Flange Nut (8) Torque
(See page 4-167.)
lb-in. (N·m) 80 (9)
Flange Nut (18) Torque (See page 4-167.)
lb-in. (N·m) 40 (4.5)
Fuse Mounting Nut Torque
lb-in. (N·m) 80 (9)
Instrument Panel Mounting Screw Torque
lb-in. (N·m) 130 (14.7)
Rectifier Kit Screw (3 and 9) Torque
(See page 4-180.)
lb-in. (N·m) 30 (3.9)
Rectifier Kit Nut (5) Torque (See page 4-180.)
lb-in. (N·m) 40 (4.5)
Front AC Traction Motor Mounting Screw Torque
lb-in. (N·m) 93 (10.5)
Front AC Traction Motor Wire Connector Nut Torque
lb-ft (N·m) 11 (14.9)
AC Traction Motor (3WD) Mounting Screw Torque
lb-ft (N·m) 35 (47.5)
3WD Traction Controller Wire Connection Screw
Torque
lb-in. (N·m) 53 (6)
Brake Coil Mounting Screw Torque
lb-in. (N·m) 65 (7.3)
4-6 4271491-Rev B
ELECTRICAL
4
Component Location
See Figures 4-1 and 4-2.
Figure 4-1: Component Location—Right Side
1 TCU (Traction Control Unit) Fan 4 Steering Input Device 7 Brake Coil
2 TCU (Traction Control Unit) 5 RCU (Reel Control Unit) 8 Traction Pedal Position Sensor
3 BRC (Brake Resistor Controller) 6 AC Traction Motor Assembly 9 Resistor Bank Assembly
2
1
TN4661,TN2752,TN2389,TN2744
9
5
4
7
6
8
3
ELECTRICAL
4271491-Rev B 4-7
4
Figure 4-2: Component Location—Left Side
1 MCU (Main Control Unit) 3 GCU (Genset Control Unit) 5 SCU (Steering Control Unit) 7 Ground
2 PDU (Power Distribution Unit) 4 3WD Traction Controller 6 LCD (Liquid Crystal Display)
TN2746,TN4662,TN2420,TN2417
1
2
7
5
6
3
4
4-8 4271491-Rev B
ELECTRICAL
4
J79 Interface Connector Location
See Figure 4-3.
Figure 4-3: J79 Interface Connector Location
1J79 Interface Connector (disconnected) 2 J79 Interface Connector (connected)
TN2823,TN2824
2
1
ELECTRICAL
4271491-Rev B 4-9
4
Main Harness Splice Identification and Locations
See Figure 4-4.
Figure 4-4: Main Harness Splice Identification and Location
1 Splice A 5 Splice H
2 Splice B 6 Splice O
3 Splice C 7 Splice T
4 Splice E 8 Reel Motor Harness Splice
TN4620
1
2
3
7
5
4
6
8
8
8
4-10 4271491-Rev B
ELECTRICAL
4
Theory and Diagnostic
Information
Electrical Component Symbols
The following symbols are used in the electrical
schematics to represent various electrical components.
Switches
1
1 The sample switch symbols shown are just a few of the many switch configurations. Switches are
designated by the number of “poles” (circuits controlled) and “throws” (actuator positions). Unless otherwise
specified, switches are shown in the “Normally Open” (N.O.) position.
Single Pole, Single Throw
(SPST)
Double Pole, Single Throw
(DPST)
Single Pole, Double Throw
(SPDT)
Double Pole, Double Throw
(DPDT)
Switching Devices
Temperature Switch Pressure Switch
Relay
Circuit Protection Devices
Fuse Circuit Breaker
t˚
P
86 30
85 87A87
ELECTRICAL
4271491-Rev B 4-11
4
Motors and Generating Devices
Electric Motor (may also include
“AC” or “DC.”)
Stator
Alternator
Actuating Devices
Solenoid Valve PTO Clutch
Engine-Related Devices
Ignition Coil Spark Plug
Regulator
Lights
Single-Element Light Dual-Element Light
M
G
G
U
3
U
4-12 4271491-Rev B
ELECTRICAL
4
Miscellaneous Symbols
Enclosure
(cabinet, housing, etc.)
Wires (crossing but not
connected)
Ground (to earth) Wiring Connections
Ground (to chassis) Coil
Direct Current (DC)
(as shown on an oscilloscope)
Battery
Alternating Current (AC)
(as shown on an oscilloscope)
Diode
Resistor Pin and Socket Connector
ELECTRICAL
4271491-Rev B 4-13
4
Electrical Schematic Component Identification
Electrical components shown in the main schematic are identified with an alpha-numeric callout. All electrical
components shown in the electrical schematic are listed below.
• A1—Power Distribution Unit (PDU) (See Figures 4-6
through 4-18.)
• A2—Liquid Crystal Display (LCD) (See Figure 4-6.)
•A3—48V Battery Pack (See Figure 4-8.)
• A4—Main Control Unit (MCU) (See Figure 4-10.)
• A5—Traction Control Unit (TCU) (See Figure 4-12.)
• A6—Traction Pedal Position Sensor (See
Figure 4-13.)
• A7—3WD Traction Control Unit (See Figure 4-14.)
•A8—Steering Wheel Input Device (See Figure 4-14.)
•A9—Steering Control Unit (SCU) (See Figure 4-15.)
• A10—Left Reel Lift Actuator (See Figure 4-15.)
• A11—Center Reel Lift Actuator (See Figure 4-15.)
• A12—Reel Control Unit (RCU) (See Figure 4-16.)
• A13—Right Reel Lift Actuator (See Figure 4-17.)
• A14—Resistor Bank (See Figure 4-12.)
• A15—Brake Resistor Controller (BRC) (See
Figure 4-12.)
• A16—Throttle Actuator (See Figure 4-18.)
• A17—Generator Control Unit (GCU) (See
Figure 4-18.)
• B1—Engine Oil Pressure Switch (See Figures 4-8
and 4-
9.)
• B2—Engine Temperature Sensor (Diesel Engine)
(See Figure 4-8.)
•B3—Fuel Level Switch (See Figure 4-9.)
• B4—Brake Pedal Position Sensor (See Figure 4-12.)
• B5—Permanent Magnet Generator Temperature
Sensor (See Figure 4-17.)
• B6—Rectifier Temperature Sensor (See
Figure 4-17.)
• B7—Steering Sensor (See Figure 4-14.)
• E1—Center Work Light (See Figure 4-11.)
• E2—Ignition Module (Gasoline Engine) (See
Figure 4-9.)
• E3—Ignition Module (Gasoline Engine) (See
Figure 4-9.)
• E4—Dome Light (See Figure 4-10.)
• F1—10A Fu se (12V Accessory Socket) (See
Figure 4-10.)
• F4—12A Circuit Breaker (MCU 48V Power, Brake
Coil, Traction Pedal Sensor, Steering Input Device,
Work Light) (See Figure 4-11.)
• F6—30A Circuit Breaker (Steering Control 48V
Power) (See Figure 4-15.)
•F7—50A Circuit Breaker (12V Switched Power) (See
Figure 4-6.)
•F8—150A Fuse (48V Switched Power) (See
Figure 4-6.)
•F9—300A F
use (48V Power) (See Figure 4-12.)
• G1—12V Battery (See Figures 4-8 and 4-9.)
• G2—Alternator (Diesel Engine) (See Figure 4-8.)
• G3—Stator (Gasoline Engine) (See Figure 4-9.)
•G4—48V Generator (See Figure 4-17.)
• H1—Horn (See Figure 4-6.)
• J1—Power Distribution Unit Connector (See
Figures 4-6 through 4-18.)
• J2—Main Control Unit Connector (See Figure 4-10.)
• J3—Main Control Unit Connector (See Figure 4-10.)
• J4—Main Control Unit Connector (See Figure 4-10.)
• J5—Reel Control Unit Connector (See Figure 4-16.)
• J6—Reel Control Unit Connector (See Figure 4-16.)
• J7—Reel Control Unit Connector (See Figure 4-16.)
•J8—Reel Control Unit Connector (See Figure 4-16.)
• J20—Left Reel Motor Connector (See Figure 4-15.)
• J21—Center Reel Motor Connector (See
Figure 4-17.)
• J22—Right Reel Motor Connector (See Figure 4-17.)
• J26—Engine Harness Connector (See Figure 4-10.)
•J28—Center Work Light Connector (See
Figure 4-11.)
• J35—Generator Control Unit Connector (See
Figure 4-18.)
• J36—Generator Control Unit Connector (See
Figure 4-18.)
• J43—Traction Control Unit Connector (See
Figure 4-12.)
• J44—Traction Control Unit Connector (See
Fig
ure 4-12.)
• J45—Traction Motor Connector (See Figure 4-13.)
• J46—Traction Motor Connector (See Figure 4-13.)
• J47—Brake Coil Connector (See Figure 4-11.)
•J48—Traction Pedal Position Sensor Connector (See
Figure 4-13.)
•J49—Brake Pedal Position Sensor Connector (See
Figure 4-13.)
• J53 (B+)—Steering Control Unit Ground Terminal
(See Figure 4-14.)
• J53 (B-)—Steering Control Unit Ground Terminal
(See Figure 4-14.)
4-14 4271491-Rev B
ELECTRICAL
4
• J54—Steering Motor Connector (See Figure 4-14.)
• J55—Steering Motor Connector (See Figure 4-14.)
• J56—Steering Wheel Input Device Connector (See
Figure 4-14.)
•J61—Fuel Level Switch Connector (See Figure 4-9.)
• J65—Steering Control Unit Connector (See
Figure 4-15.)
• J66—Diesel Engine Connector (See Figure 4-8.)
• J67—Left Reel Motor Connector (See Figure 4-15.)
•J68—Center Reel Motor Connector (See
Figure 4-17.)
•J69—Right Reel Motor Connector (See Figure 4-17.)
• J72—3WD Motor Connector (See Figure 4-17.)
• J74—Traction Motor Connector (See Figure 4-13.)
• J75—Brake Coil Diode Connector (See Figure 4-11.)
•J93—3WD Connector (See Figure 4-13.)
•J94—3WD Traction Control Unit CAN Connector
(See Figure 4-14.)
•J97—Generator Control Harness Connector (See
Figure 4-10.)
•J99—12V Accessory Socket Connector (See
Figure 4-10.)
• J124—Resistor Bank Terminals (See Figure 4-12.)
• J104—Power Distribution Unit Connector (See
Figures 4-6 through 4-14.)
• J106—12V Accessory Socket Harness Connector
(See Figure 4-10.)
• J110—Steering Sensor Connector (See
Figure 4-14.)
• J111—3WD Traction Control Unit Connector (See
Figure 4-14.)
• J120—Brake Resistor Controller Connector
(See Figu
re 4-12.)
• J122—Power Distribution Unit Connector (RCU 48V
Power) (See Figure 4-15.)
• J123—Optional OPS Light Connector (See
Figure 4-11.)
• J124—Resistor Bank Terminal (See Figure 4-12.)
• J125—Resistor Bank Ground Terminal (See
Figure 4-12.)
•K1—48V Traction Contactor (See Figure 4-12.)
•K2—48V Switched Power Contactor (See
Figure 4-6.)
• K3—12V Switched Power Contactor (See
Figure 4-6.)
• K4—Start Relay (See Figure 4-9.)
•K5—Glow Plug Relay (See Figure 4-9.)
• K6—Genset Fan Relay (See Figure 4-18.)
•K7—48V Steering Relay (See Figure 4-15.)
• M1—Starter Motor (See Figures 4-8 and 4-9.)
• M2—Traction Motor (See Figure 4-13.)
• M3—3WD Motor (See Figure 4-13.)
• M4—Left Reel Motor (See Figure 4-15.)
• M5—Center Reel Motor (See Figure 4-17.)
• M6—Right Reel Motor (See Figure 4-17.)
• M7—Steering Motor (See Figure 4-14.)
•M8—Genset Fan (See Figure 4-18.)
•M9—Traction Control Unit Fan (See Figure 4-11.)
• N1—Voltage Regulator (Gasoline Engine) (See
Figu
re 4-9.)
•R14—Glow Plugs (See Figure 4-8.)
• R17—Can Termination Resistor (See Figure 4-10.)
• S1—Key Switch (See Figure 4-6.)
• S2—Work Light Switch (See Figure 4-7.)
• S3—Horn Switch (See Figure 4-7.)
• S4—Right Reel Enable Switch (See Figure 4-7.)
• S5—Center Reel Enable Switch (See Figure 4-7.)
• S6—Seat Switch (See Figure 4-7.)
• S7—Left Reel Enable Switch (See Figure 4-7.)
•S8—Mow Switch (See Figure 4-7.)
•S9—Raise/Lower Switch (See Figure 4-7.)
• S12—Brake Pedal Switch (See Figure 4-11.)
• Splice A (See Figure 4-11.)
• Splice B (See Figure 4-13.)
• Splice C (See Figure 4-14.)
• Splice E (See Figure 4-10.)
• Splice G (See Figure 4-7.)
• Splice H (See Figure 4-10.)
• Splice O (See Figure 4-11.)
• Splice Q (See Figure 4-14.)
• Splice R (See Figure 4-14.)
• Splice T (See Figure 4-20.)
• V3—Switched Power Contactor Diode (See
Figure 4-6.)
• V4—Start Relay Diode (See Figure 4-9.)
•V5—Glow Plug Relay Diode (See Figure 4-9.)
• V6—Brake Coil Diode (See Figure 4-11.)
•Y1—Fuel Shutoff Solenoid (Diesel Engine) (See
Figure 4-8.)
•Y2—Fuel Shutoff Solenoid (Gasoline Engine) (See
Figure 4-9.)
• Y3—Brake Coil (See Figure 4-11.)
ELECTRICAL
4271491-Rev B 4-15
4
Reel Motor Connector Pin Locations
See Figure 4-5.
NOTE
The right, left, and center reel motor connectors are
configured the same. Figure 4-5 depicts the female
connector end view for the following connectors:
• Right Reel Motor Connector J67 pins 1 through 8
• Center Reel Motor Connector J68 pins 1 through 8
• Left Reel Motor Connector J69 pins 1 through 8
Figure 4-5: Reel Motor Connector Pin Locations
TN2841
1
4
2
5
3
76
8
4-16 4271491-Rev B
ELECTRICAL
4
Electrical Schematic
See Figures 4-6 through 4-18.
Figure 4-6
S1
Key
Switch
F8
150A
Fuse
F7
50A
Circuit
Breaker
V3
A2
Liquid
Crystal
Display
(LCD)
A1
Power
Distribution
Unit
(PDU)
K2
48V
Switched
Power
Contactor
K3
12V
Switched
Power
Contactor
48V
Stud 3
Stud 6
12V
Off
Run
Start
A
B
C
D
59 Red
J87-1 61 Red
J87-2 123 Blk
59
Red
18
Red/
Gry
58
Red
J1-12
J1-4
J1-1
1H
Blk
To
12V
Battery
(Genset Models Only)
To
Generator
GC2
GC2
52 Wht12 Wht/Grn
245
Shield
Shield
42
Blk/
Wht
1G
Blk
92C
Grn
91C
Yel
J91-6 J90-C J90-B J90-A
J91-1
J91-2
244
Grn
243
Yel
CAN Shield
CAN Low
CAN High
48V Unswitched Power
48V Power Bus
48V Switched Power
48V Power Bus
48V Switched Power
12V Switched Power
12V Switched Power
60 Red
61
Red
J11-5
Ignition
J12-2
Start
J11-9 Horn Output (-)
J11-10 Switched Power Contactor Output (-)
J11-8 +48V
Right Reel Enable J12-6
Horn Switch J12-10
Work Light Switch J12-9
+12V Power Supply J11-6
Center Reel Enable J12-4
Left Reel Enable J12-3
Mow Switch J12-5
Raise Input J12-7
Lower Input J12-8
Ground
J11-7
CAN
Shield
J11-1
CAN
Low
J11-11
CAN
High
J11-12
J10
135 Yel
124 Red
124 Red
Splice B
LCD
Harness
146 Wht
147 Lt Bl
u
139 Yel
138 Org
137 Brn
140 Grn
144 Vio
145 Gry 145 Gry
144 Vio
140 Grn
137 Brn
138 Org
139 Yel
146 Wht
136 Wht
147 Lt Blu
H1
Horn
TN4577
ELECTRICAL
4271491-Rev B 4-17
4
Electrical Schematic
Continued
Figure 4-7
Raise
Off
Lower
J19-6 126 Red
J19-1 127 Red
J19-2
J19-5
S9
Raise/Lower
Switch
CAN Shield
CAN Low
CAN High
CAN Shield
CAN Low
CAN High
CAN Shield
CAN Low
CAN High
CAN Shield
CAN Low
CAN High
48V Power Bus
48V Switched Power
48V Power Bus
48V Switched Power
12V Switched Power 12V Switched Power
124 Red 124 Red
Splice G
LCD
Harness
145 Gry 145 Gry
144 Vio 144 Vio
131
Red
134
Red
132
Red
140 Grn
137 Brn
146 Wht J15-3 J15-2
On
Off
S3
Horn
Switch
147 Lt Blu J14-3 J14-2 133 Red
On
On
Off
Off
S2
Work
Light
Switch
71 Drk Grn
128 Red
129 Red
60 Drk Grn J41-1J91-3
J91-4
J41-2 71 Drk Grn
S6
Seat
Switch
137 Brn J16-3 J16-2 125 Red
On
Off
S7
Left
Reel
Enable
Switch
140 Grn J13-3 J13-2 133 Red
On
Off
S8
Mow
Switch
139 Yel
J18-3 J18-2 132 Red
S4
Right
Reel
Enable
Switch
On
Off
138 Org J17-3 J17-2 130 Red
S5
Center
Reel
Enable
Switch
127 Red
126 Red
125 Red
On
Off
TN4578
4-18 4271491-Rev B
ELECTRICAL
4
Electrical Schematic
Continued
Figure 4-8
GC1 GC2
G1
12V
Battery
Ground
Block
A1
Power
Distribution
Unit
(PDU)
Diesel Engine
Stud 1
48V Power Bus
48V Switched Power
48V Power Bus
48V Switched Power
+
-
12V Switched Power 12V Switched Power
CAN Shield
CAN Low
CAN High
To
PDU
Stud 6
Hold-In
Coil
Pull-In
Coil
CAN Shield
CAN Low
CAN High
CAN Shield
CAN Low
CAN High
CAN Shield
CAN Low
CAN High
71 Drk Grn 71 Drk Grn 71 Drk Grn 71 Drk Grn
282 Brn
281 Lt Blu
18 Brn/Wht
279 Red
6A Red J83B
283 Blu
284 Org
M1
Starter
Motor
A3
48V
Battery
Pack
M
P
B1
Engine
Oil
Pressure
Switch
B2
Engine
Temperature
Sensor
R14
Glow
Plugs
Y1
Fuel
Shutoff
Solenoid
G2
Alternator
280
Wht
6
Red
J66-1*
J66-7
J66-5
J66-3*
J66B-1
To
K5
Glow
Plug
Relay
339 Yel
Diesel
Engine
Select
Jumper
J66-12*
J66-10*
J66-4*
280 Wht
J66-2
To
K4
Start
Relay
G
U
3
J83 (IG)
To
J26-5
*To
MCU
*To
MCU
*To
MCU
TN4579
ELECTRICAL
4271491-Rev B 4-19
4
Electrical Schematic
Continued
Figure 4-9
Gasoline Engine
67 Wht
G1
12V
Battery
E2
Ignition
Module
E3
Ignition
Module
48V Power Bus
48V Switched Power
48V Power Bus
48V Switched Power
+
-
12V Switched Power 12V Switched Power
1E
Blk
1E
Blk
J61-2 J61-1
J97-2
CAN Shield
CAN Low
CAN High
To
PDU
Stud 6
J32-1
274
Wht
274
Wht
273
Red
J32-2
J59-Output
CAN Shield
CAN Low
CAN High
CAN Shield
CAN Low
CAN High
CAN Shield
CAN Low
CAN High
71 Drk Grn 71 Drk Grn 71 Drk Grn 71 Drk Grn
13 Wht/Red
276 Vio
273 Red
312 Brn
13 Wht/Red
14 Wht/Brn
J1-9 J1-6
J26-2
To
M1
Starter
Motor
J66-1
To Glow Plugs
109
Brn/
Yel
J26-2
To
K4
Start
Relay
J26-1*
15
Wht/
Yel
J1-7J104-H
M1
Starter
Motor
K4
Start
Relay
K5
Glow
Plug
Relay
M
8787A 85
8630
8787A 85
8630
P
B1
Engine
Oil
Pressure
Switch
B3
Fuel
Level
Switch
Y2
Fuel
Shutoff
Solenoid
G
G3
Stator
N1
Voltage
Regulator
V4 V5
J26-6*
J26-4*
336 Yel
Gasoline
Engine
Select
Jumper
J26-12*
*To
MCU
*To
MCU
*To
MCU
J26-11*
A1
Power
Distribution
Unit
(PDU)
GC2
TN4580
4-20 4271491-Rev B
ELECTRICAL
4
Electrical Schematic
Continued
Figure 4-10
A1
Power
Distribution
Unit
(PDU)
48V Power Bus 48V Power Bus
48V Switched Power 48V Switched Power
12V Switched Power 12V Switched Power
Shield1F
Blk
92A
Grn
91A
Yel
Gro
und
J2-9
CAN
Shield
J2-10
CAN
Low
J2-12
CAN
High
J2-11
CAN Shield
CAN Low
CAN High
CAN Shield
CAN Low
CAN High
81C Brn
71 Drk Grn
J1-10
A4
Main
Control
Unit
(MCU)
J26
Engine
Harness
Connector
13 Wht/Red
13 Wht/Red
J2-8
12V
Power
Input
65 Brn
67 Wht 67 Wht/Blu
61 Vio
64 Brn/Wht 64 Brn/Wht
62 Red/Org
63 Org/Wht
14 Wht/Brn
14 Wht/Brn
9A Pnk
150 Red
9B
Pnk
9C
Pnk
9D
Pnk
1K
Blk
5A Red/Blk
5A Red/Blk
16
Red/Grn
9
Pnk
5
To
Diesel
Engine
Harness
Connector
J66-5
Splice E
J107-1
J107-2
71 Drk Grn
J4-10 Seat Switch
J3-9 Fuel Level
J3-7 Oil Pressure
J2-1 Magneto (-)
Work Light Output (-) J3-5
48V Power Input J2-7
Traction Contactor Output (-) J3-6
Genset Fault Input J3-10
11 Wht/Blu 11 Wht/Blu
20 Wht/Blu
20 Wht/Blu
81C Brn
Brake Input J3-12
J2-5 Fuel Pull-In (+)
J2-4 Fuel Hold (+)
J2-2 Start (+)
1
7
3
4
6
12
11
10
J2-3 Glow Plug (+)
66 Lt Blu
J3-8 Engine Temperature
J1-5
12V Power Input J2-6
J99
12V
Accessory
Socket
(Hybrid Models)
F1
10A
Fuse
R17
CAN
Termination
Resistor
J26
E4
Dome
Light
(Hybrid Models)
112 Blu112 Blu
TCU Fan Output (-) J3-4
110 Yel/Blk 110 Blu
120
Ohms
J97-3
12V Whisper Mode J3-2
J4-6 5 Volt Supply
J4-2 Program Select 1 (Gasoline Genset)
68 Yel
Splice H
J79-A
91
Yel
92
Grn
Shield
J79-B J79-C
70 Grn/Wht
108 Gry/Wht
69B Grn
69A Grn
69 Grn
J4-3 Program Select 2 (Diesel Genset)
Program Select 3 J4-4
Program Select 4 J4-5
Ground J4-7
110 Blu
J97-1
J106-1
153
Blk
152
Red
151
Red
1J
Blk
J106-2
GC2
GC2
GC2
TN4581
/