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

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

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

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

52 Wht12 Wht/Grn

245

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

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

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

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

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

9A Pnk

150 Red

9B

Pnk

9C

Pnk

9D

Pnk

1K

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

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

TN4581

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

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

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