CASE 721F, 821F, 921F TIER 4 WHEEL LOADER ELECTRICAL SCHEMATIC

INDEX OF FUNCTIONS

SHT

SHT

SHT

ECD

SHT

SHEET

SHEET

SHEET

SHEET

6

BACKUP ALARM

5 , 14

5

COLOR ABBREVIATIONS 70 62

SHT

SHT

SHT

SHT

SHT

SHT

71

SHT

LARGE CONNECTOR LIST SHEET

INDEX / WIRE INFORMATION SHEET

SHEET

CONNECTOR LIST

1

2

SHEET

3

18

13

21

14

15

20 5

9

_ 2

8

158 1 10

4

Relay in location F5/F6

160

Relay in location F3\F4 6

16

11

17 159

CONNECTOR LIST

3

COLD START

4 IGNITION SWITCH POWER DISTRIBUTION ELECTRICAL SCHEMATIC SIDE 1 721F, 821F, 921F TIER 4 WHEEL LOADER Additional copies of this schematic can be ordered through Technical Publications Distribution System. Part # RAC 84419913

22

24

92 90 CONNECT FOR NA OPERATION, OPP SIDE STEADY ON. DISCONNECT FOR EUROPEAN OPERATION, OPP SIDE OFF.

162 161

Relay in location F7\F8

Relay in location F1/F2

Relay in location F9\F10

93

95

78 CAN_L3 G-0.8 CAN_H3 Y-0.8

91

North American models European and International models 101

101

100

100

Turn Signal

23 163

Driving Lights

Light/ Horn

79

Horn

169

94 164

168

103 165

96

97

167 166

102

ENGINE CONTROL

5

LIGHTING 1

6

BACKUP ALARM

172

89

54 173

171

81

55

57

59

56 88

87 174

80

86 46

47 45

61 48 58 49 85 50 84 51

52

170

53

83

60 82

LIGHTING 2

7

TRANSMISSION CONTROLS ELECTRICAL SCHEMATIC 721F, 821F, 921F TIER 4 WHEEL LOADER

8 SIDE 2

Additional copies of this schematic can be ordered through Technical Publications Distribution System. Part # RAC 84419913

25

35 36

26

63

29

33 64 31

32

98

68

74

27

72 37

67

65

99

75 69 73

39

28

76 40

34

38

66

30

41 42 44

43

9

INSTRUMENT CLUSTER

10

MACHINE CONTROLS

121 113 122

155

129

154

122 126

104 128

108

130

105 114

106

125

124

123

119

115 107 117

109 156

111

116 BLUE

BROWN

DOWN LIMIT SWITCH

112 113

UP LIMIT SWITCH

Note: Telematics for future models

127 157

NO COM

110 118

NC

R S

HOOD LIFT

11

HVAC

R S

AIR SEAT

RADIO POWER/CONVERTER 12 ELECTRICAL SCHEMATIC 721F, 821F, 921F TIER 4 WHEEL LOADER

SIDE 3

Additional copies of this schematic can be ordered through Technical Publications Distribution System. Part # RAC 84419913

145

144 143 146 184

177 175

147

8

8 148

185

176

179

153 150

149

152 151

178

181

182 180

183

JOYSTICK STEERING (FOR PL18 & PL23 ONLY)

186

13

STANDARD HVAC

14

COMPONENT NUMBERS

721F, 821F, 921F Tier 4 Wheel Loader ELECTRICAL SCHEMATIC LEGEND INDICATES CONSTANT POWER INDICATES SWITCH IS INDICATES SWITCH IS

POWER WHEN KEY ON POWER WHEN KEY IN START POSITION POWER RELAY A POWER RELAY B POWER RELAY C POWER RELAY D ILLUMINATION

ELECTRICAL WIRING INFORMATION

15

COMPONENT STARTING RELAY RESISTOR - 75 OHM ALTERNATOR CRANK CONTROL RELAY BATTERIES CRANK REQUEST RELAY MASTER DISCONNECT SWITCH STARTER IGNITION SWITCH NEUTRAL START RELAY POWER RELAY MODULE A POWER RELAY MODULE B POWER RELAY MODULE C GRID HEATER RELAY GRID HEATER POWER RELAY MODULE D WATER SEPARATOR HEATER FUEL FILTER HEATER WATER IN FUEL SENSOR THROTTLE POTENTIOMETER ENGINE CONTROLLER RETURN TO TRAVEL FLOAT SWITCH HEIGHT CONTROL SWITCH ELECTROMAGNETIC DETENTS RETURN TO DIG PROXIMITY SWITCH PILOT CONTROL RELAY ECD-K3 HEIGHT CONTROL AND RETURN TO TRAVEL PROXIMITY SW RETURN TO DIG SWITCH PIN ENGAGE SWITCH (OPTION) PILOT PRESSURE SOLENOID PIN ENGAGE SOLENOID (OPTION) RIDE CONTROL SWITCH (OPTION) RIDE CONTROL RELAY (OPTION) FAN CONTROL SWITCH (OPTION) FAN REVERSE RELAY (OPTION) PILOT CONTROL SWITCH RIDE CONTROL SOLENOID (OPTION) ROLLBACK PRESSURE SW (XT WITH RIDE CONTROL ONLY) ROLLBACK JUMPER FAN PWM SOLENOID FAN REVERSE SOLENOID (OPTION) OUTPUT SPEED SENSOR TRANSMISSION SOLENOID VALVE AND TEMP SENDER FILTER MAINTENANCE SWITCH

COMPONENT # SHT 61 8 DIAGNOSTIC CONNECTOR 62 1 INSTRUMENT CLUSTER CONNECTOR 1 63 9 WARNING BUZZER 64 9 PARKING BRAKE RELAY 65 9 FUEL LEVEL SENDER 66 9 AIR FILTER RESTRICTION SWITCH 67 9 PARKING BRAKE SOLENOID 68 9 RADIATOR COOLANT TEMPERATURE SENDER 69 9 BRAKE PRESSURE WARNING SWITCH 70 1 SWITCH PAD 71 1 INSTRUMENT CLUSTER CONNECTOR 2 72 9 HYDRAULIC FILTER RESTRICTION SWITCH 73 9 HYDRAULIC OIL TEMPERATURE SENDER 74 9 PARK BRAKE SWITCH 75 9 REDUNDANT BRAKE PRESSURE SWITCH 1 76 9 REDUNDANT BRAKE PRESSURE SWITCH 2 78 6 BACKUP ALARM RELAY 79 6 BACKUP ALARM DISABLE SWITCH 80 7 WORK LAMPS SWITCH 81 7 DOOR SWITCH 82 7 ROTATING BEACON (OPTIONAL) 83 7 DOME LAMP 84 7 ROTATING BEACON SWITCH (OPTIONAL) 85 7 LEFT HAND FRONT WORK LAMP 86 7 RIGHT HAND FRONT WORK LAMP 87 7 LEFT HAND REAR WORK LAMP 88 7 RIGHT HAND REAR WORK LAMP 89 7 DIODES 90 6 BRAKE LAMP SWITCH 91 6 BRAKE LAMP RELAY 92 6 FLASHER MODULE 93 6 HAZARD SWITCH 94 6 TURN SIGNAL, HIGH-LOW BEAM, AND HORN SWITCH 95 6 DRIVING LAMPS SWITCH 96 6 LEFT HAND FRONT COMBINATION LAMPS 97 6 RIGHT HAND FRONT COMBINATION LAMPS 98 10 HORN RELAY 99 10 HORN RELAY 100 6 RIGHT HAND REAR COMBINATION LAMPS 101 6 LEFT HAND REAR COMBINATION LAMPS 102 6 LICENSE PLATE LAMP 103 6 BACKUP ALARM 104 11 FRONT WIPER HIGH SPEED RELAY 105 11 WIPER CUTOUT RELAY

# 119 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163

SHT 12 12 12 12 12 12 12 12 12 12 12 NA NA NA NA NA NA NA NA NA NA NA NA 14 14 14 14 14 14 14 14 14 14 14 11 11 11 11 4 4 4 5 5 5

8 8 8 8 8

TORQUE CONVERTER OUTPUT TEMPERATURE SENDER ENGINE SPEED SENSOR INTERMEDIATE SPEED SENSOR TURBINE SPEED SENSOR TRANSMISSION SHIFTER

106 107 108 109 110

11 11 11 11 11

FRONT WIPER LOW SPEED RELAY REAR WIPER AND WASHER SWITCH FRONT WIPER AND WASHER SWITCH FRONT WIPER MOTOR REAR WIPER MOTOR

164 165 166 167 168

5 5 5 5 5

TANK HEATER CONTROL VALVE DEF LEVEL AND TANK TEMPERATURE UPSTREAM TEMPERATURE SENSOR DOWNSTREAM TEMPERATURE SENSOR DOSER METERING VALVE

8 8 8 8 8 8 8 8

TRANSMISSION ELECTRONIC CONTROL MODULE TRANSMISSION ENABLE SWITCH FNR SWITCH FOR JOYSTICK CONTROLS TRANSMISSION KICK DOWN SWITCH FNR SWITCH FOR SINGLE AXIS CONTROLS TRANSMISSION AUTO SWITCH BRAKE DECLUTCH PRESSURE SWITCH DECLUTCH SWITCH

111 112 113 114 115 116 117 118

11 11 11 11 11 11 11 11

REAR WASHER MOTOR FRONT WASHER MOTOR DIODES SECONDARY STEERING DIODES SECONDARY STEERING SOLENOID SECONDARY STEERING MODULE SECONDARY STEERING MOTOR SECONDARY STEERING PRESSURE SWITCH

169 170 171 172 173 174 175 176

5 7 8 8 8 8 13 13

DNOX CONTROLLER REAR VIEW CAMERA/MONITOR DIFFERENTIAL LOCK SWITCH (MANUAL) DIFFERENTIAL LOCK SWITCH DIFFERENTIAL LOCK SOLENOID LOCKUP SOLENOID JOYSTICK PVRES TRANSMISSION KICK DOWN SWITCH

# 1 2 3 4 5 6 8 9 10 11 13 14 15 16 17 18 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47

SHT 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 5 5 5 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 8 8 8

48 49 50 51 52 53 54 55 56 57 58 59 60

COMPONENT DIAGNOSTIC CONNECTOR POWER CONVERTER - 24 TO 12 VOLT 12 VOLT POWER OUTLETS (OPTION) RADIO RIGHT SPEAKER LEFT SPEAKER AIR SEAT CIGAR LIGHTER AIR CONDITIONING CLUTCH RELAY AIR CONDITIONING HIGH-LOW PRESSURE SWITCH AIR CONDITIONING COMPRESSOR CLUTCH ELECTRONIC PANEL EXTERNAL AIR TEMPERATURE SENSOR INTERNAL AIR TEMPERATURE SENSOR SUN SENSOR BLOWER FAN RESISTOR BLOWER MOTORS THERMOCOUPLE SENSOR MIXED AIR SENSOR COMPRESSOR RELAY RECYCLING MOTOR ELECTRONIC WATER VALVE 24 TO 12 VOLT CONVERTER ACTUATOR DRIVER ELECTRONIC WATER VALVE BLOWER FAN RESISTOR BLOWER MOTOR THERMOSTAT FAN SPEED SWITCH AIR CONDITIONING SWITCH CONTROL PANEL LAMPS WATER VALVE POTENTIOMETER AIR RECIRCULATING SWITCH HOOD UP RELAY HOOD DOWN RELAY HOOD SWITCH HOOD MOTOR IGNITION POWER LATCH IGNITION POWER CONTROL START LOCKOUT NOX SENSOR HUMIDITY AND AMBIENT TEMPERATURE SENSOR NOX SENSOR (NOXS)

# 177 178 179 180 181 182 183 184 185 186

SHT 13 13 13 13 13 13 13 13 13 13

COMPONENT ARM POS FNR SWITCH (OPTION) FNR RELAY PILOT DUMP VALVE JSS VALVE LOAD SENSE PRESSURE SENSOR PILOT PRESSURE SWITCH JSS RELAY JOYSTICK STR SWITCH (OPTION) JSS CONTROLLER

COMPONENT NUMBERING INFORMATION ELECTRICAL SCHEMATIC 721F, 821F, 921F TIER 4 WHEEL LOADER

16 SIDE 4

Additional copies of this schematic can be ordered through Technical Publications Distribution System. Part # RAC 84419913

COMPONENTS 1

Rear Axle Brakes Modula on Pressure 68 to 75 bar (985 to 1090 PSI) 2 Front Axle Brakes Modula on Pressure 70 to 77 bar (1015 to 1115 PSI) 3 Brake Damping Accumulators 0.16 liter (0.17 quart) 7 bar (102 PSI) Precharge 4 Parking Brake 5 Brake Signal, 5-speed transmission 6 Brake Declutch Switch, 4-speed transmission Electrical Connector PBD 24 bar (350 PSI) 7 Brake Light Switch 4.1 bar (60 PSI) Increasing 8 Parking Brake Accumulator 0.16 liter (0.17 quart) 96 bar (1390 PSI) Precharge 9 Front Brake Accumulator 3.5 liter (3.7 quart) 70 bar (1015 PSI) Precharge 10 Rear Brake Accumulator, 3.5 liter, 70 bar precharge 3.5 liter (3.7 quart) 70 bar (1015 PSI) Precharge

NOTES

CIRCUIT DIAGRAM LEGEND PUMP SUPPLY

# SHOWS CIRCUIT CROSSING NOT CONNECTED

SHOWS CIRCUIT CONNECTED

COMPONENT NUMBER

CHECK VALVE

RESTRICTOR

FILTER OR SCREEN

OIL COOLER

CIRCUIT

LOAD SENSE

COMPONENT

PILOT LINE TYPES

Note 1 : Optional Check Valve for Ride Control Only Note 2 : Check and Relief Valves not used with Fan Reverser

CONVERSION INFORMATION 1 bar = 14.5 pounds per square inch (PSI) 1 liter per minute = .264 gallons per minute

11 Redundant Accumulator Pressure Switches Electrical Connectors PRB1, PRB2 Rising < 91 bar (< 1320 PSI) Falling 70 to 84 bar (1015 to 1220 PSI) 12 Low Brake Pressure Warning Switch Alarm OFF 138 bar (2000 PSI) Increasing Alarm ON 115 to 129 bar (1670 to 1870 PSI) Decreasing 13 Brake Valve 13A Parking Brake Solenoid Electrical Connector YPB 13B Front Brake Valve 13C Rear Brake Valve 13D Accumulator Isola on Check Valve 13E Accumulator Charging Spool 13F Priority Valve Cut-In Pressure 157 to 167 bar (2275 to 2420 PSI) Cut-Out Pressure 190 to 196 bar (2755 to 2845 PSI) 14 Coupler Locking Valve 15 Coupler Locking Cylinders 16 Pilot Control Valve 16A Pilot ON/OFF Solenoid Electrical Connector YPP 16B Bucket Pilot Control

16C 16D 16E 17

18 19 20 20A 20B 20C 20D 21

22 22A 22B 22C 22D 22E

Li Pilot Control Auxiliary Hydraulics Pilot Control 1 Auxiliary Hydraulics Pilot Control 2 Pilot Control Accumulator 0.75 liter (0.79 quart) 13.8 bar (200 PSI) Precharge Bucket Cylinder Z-Bar Li Cylinders Ride Control Valve Ride Control Solenoid Electrical Connector YRC Ride Control Spool Valve Manual Bleed Valve Pressure Relief Valve 280 bar (4060 PSI) Ride Control Accumulator 3.78 liter (4 quart) 14.5 bar (210 PSI) Precharge Loader Valve Load Sense Shu le Valve Regenera on Relief Valve Flow Compensator Spool Regenera on Check Valve Circuit Relief Valve with An -Cavita on

22F Pilot Pressure Reducing Valve 29 to 40 bar (420 to 580 PSI) 22G Pilot Pressure Relief 22H Load Sense Signal Bleed Down Orifice 22J Loader Main Relief 22K Shu le Check Valve 23 Steering Cylinders 24 Steering Control Valve 24A Steering Spool 24B Gerotor Pump 24C Circuit Relief Valve 25 Steering Back Pressure Valve 8 to 10 bar (115 to 145 PSI) 26 Steering Back Pressure Sensor Joys ck Steering Only 27 Joys ck Steering Load Sense Resolver 28 Joys ck Steering Valve 28A Control Spool 28B Pressure Reducer 28C Pilot Dump Valve 29 Auxiliary Steering Accumulator 0.32 liter (0.34 quart) 60 bar (870 PSI) Precharge 30 Auxiliary Steering Control Valve

30A Auxiliary Steering Ac va on Solenoid Electrical Connector YSS 30B Relief Valve 240 bar (3480 PSI) 30C Priority Spool 31 Auxiliary Steering Pump 32 Auxiliary Steering Pressure Switch Electrical Connector PSS 33 Second Pump (Farthest from Transmission) 120 LPM (31.6 GPM) Cut Off 280 bar (4060 PSI) Delta 24 to 26 bar (350 to 375 PSI) 33A Compensator Differen al Pressure Spool 33B Compensator High Pressure Cutoff Spool 33C Control Piston with Spring 33D Rota ng Group with Swash Plate 34 First Pump (Closest to Transmission) 120 LPM (31.6 GPM) Cut Off 280 bar (4060 PSI) Delta 28 to 30 bar (405 to 435 PSI) 34A Compensator Differen al Pressure Spool 34B Compensator High Pressure Cutoff Spool 34C Control Piston with Spring 34D Rota ng Group with Swash Plate 35 Priority Valve

35A Priority Spool 35B Differen al Pressure Relief 40 bar (580 PSI) 35C Steering Relief 216 bar (3130 PSI) 36 Brake Pump 37 100 Mesh Strainers 38 Hydraulic Reservoir 90 liter 39 Reservoir Vent 100 mesh 0.03 bar check 0.35 bar relief 40 Filter Electrical Connector PHF 10 micron media Bypass 3.4 bar (50 PSI) Warning Switch 2.7 bar (40 PSI) 41 Oil Cooler Thermal Valve 2.4 to 3.6 bar (35 to 52 PSI) Bypass 42 Hydraulic Oil Cooler 43 Oil Cooler Fan

44 Standard Fan Valve 162 bar (2350 PSI) 45 Fan Reversing and Variable Valve 45A Crossover Relief 234 bar (3395 PSI) 45B Reversing Spools 45C Pulse Width Modula on (PWM) Relief Valve 165 bar (2390 PSI) 45D ON/OFF Reversing Solenoid Electrical Connector YFR 46 Steering Cylinder Relief Valves 345 bar (5000 PSI)

HYDRAULIC SCHEMATIC 821F WHEEL LOADER Additional copies of this Schematic can be ordered through Technical Publications Distribution System. Part # RAC 84419918.