John Deere 330CLC and 370C Excavators are built for optimal efficiency and performance. This operation, maintenance, and diagnostic test service manual provides all the information and instructions needed to operate and maintain your machine. Save time and money with easy-to-understand troubleshooting steps and detailed technical diagrams. It's designed to last, with no corners cut. Enjoy the piece of mind of reliable operation and top-of-the-line performance. Plus, helpful diagnostic tools make repairs and maintenance simpler than ever.

1. tm1926 - 330CLC and 370C Excavator
Technical Manual
Main Sections
Engine
Power Train
Electrical System
Hydraulic System
Operational Checkout Procedure
Foreword
Technical Information Feedback Form
General Information
Safety
Theory of Operation
Diagnostic Information
Tests
Theory of Operation
Diagnostic Information
Theory Of Operation
Diagnostic Information
System Information
System Diagrams
Sub-System Diagnostics
References
Operational Checkout Procedure

2. Tests
Theory Of Operation
Diagnostic Information
Tests
Dealer Fabricated Tools
Dealer Fabricated Tools
Heating and Air Conditioning

3. 3
Table of Contents
Table of Contents
Table of Contents
tm1926 - 330CLC and 370C Excavator
Table of Contents
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Section 9015: Electrical System
Foreword
Technical Information Feedback
Form Section 9000: General
Information
Section 9005: Operational Checkout Procedure
Operational Checkout
Section 9010: Engine
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Group 01: Safety
Group 05: System
Information Group 10:
System Diagrams
Group 15: Sub-System Diagnostics
Group 10: Operational Checkout Procedure
Group 05: Theory of Operation
Group 15: Diagnostic Information
Group 25: Tests
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Recognize Safety Information
Follow Safety Instructions
Operate Only If Qualified
Wear Protective Equipment
Avoid Unauthorized Machine
Modifications Add Cab Guarding for
Special Uses
Inspect Machine
Stay Clear of Moving Parts
Avoid High-Pressure Oils
Beware of Exhaust Fumes
Prevent Fires
Prevent Battery Explosions
Handle Chemical Products Safely
Dispose of Waste Properly
Prepare for Emergencies
Use Steps and Handholds Correctly
Start Only From Operator's Seat
Use and Maintain Seat Belt
Prevent Unintended Machine Movement
Avoid Work Site Hazards
Keep Riders Off Machine
Avoid Backover Accidents
Avoid Machine Tip Over
Use Special Care When Lifting Objects
Add and Operate Attachments Safely
Park and Prepare for Service Safely
Service Cooling System Safely
Remove Paint Before Welding or Heating
Make Welding Repairs Safely
Drive Metal Pins Safely
Engine Speed Control System Operation
Diagnose Engine Malfunctions
Engine Speed Test
Fuel Line Leakage Test
Air Filter Restriction Indicator Switch Test
Air Intake System Leakage Test
Radiator Air Flow Test
Engine Power Test Using Turbocharger Boost Pressure
Electrical Diagram Information
Explanation of Wire Markings
Fuse Specifications
System Functional Schematic and Master Legend
Overall Machine Harnesses Component Location Diagram
Cab Harness (W1) and Alternator Relay Sub-Harness (W11) Component Location Diagram
Cab Harness (W1) and Alternator Relay Sub-Harness (W11) Component Location Diagram—Harness Connectors
Engine Harness (W2) Component Location Diagram
Engine Harness (W2) Component Location Diagram—Harness Connectors
Monitor Harness (W3) and Windshield Wiper Motor Sub-Harness (W6) Component Location Diagram
Monitor Harness (W3) and Windshield Wiper Motor Sub-Harness (W6) Component Location Diagram—Harness Connectors
Air Conditioner and Heater Harness (W7) Component Location
Air Conditioner and Heater Harness (W7) Wiring Diagram
Pump Harness (W12) Component Location Diagram
Pump Harness (W12) Component Location Diagram—Harness Connectors
Engine Control Unit Harness (W19) Component Location Diagram
Engine Control Unit Harness (W19) Component Location Diagram—Harness Connectors
Engine Control Unit Engine Harness (W20) Component Location Diagram
Engine Control Unit Engine Harness (W20) Component Location—Harness Connectors
Fuel Injector Harness (W22) Component Location Diagram
Fuel Injector Harness (W22) Component Location Diagram—Harness Connectors
Starting and Charging Circuit Theory of Operation
Travel Alarm Circuit Theory of Operation
Monitor Controller and Display Circuit Theory of Operation
Engine Control Unit Circuit Theory of Operation
Pump and Valve Controller Circuit Theory of Operation
Windshield Wiper And Washer Circuit Theory of Operation
Air Conditioner and Heater Controller Circuit Theory of Operation
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4. Group 20: References
Group 05: Theory of Operation
Group 05: Theory Of Operation
Group 15: Diagnostic Information
Group 15: Diagnostic Information
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Track Adjuster And Recoil Spring Operation
Propel Gearbox Operation—330CLC (S.N. —082518)
Propel Gearbox Operation—330CLC (S.N. 082519— )
Propel Gearbox Operation—370C
Diagnose Undercarriage Components Malfunctions
Measure Swing Bearing Wear
Hydraulic System Diagram and Operation
Pilot System Diagram and Operation
Pilot Pump, Pressure Regulating Valve, and Filter Operation
Pilot Shut-Off Valve Operation
Pilot Controller Operation
Propel Pilot Controller Operation
Flow Regulator Valve and Warm-Up Circuit Operation
Hydraulic Pumps and Drive Gearbox Operation
Hydraulic Pump Regulator Operation
Engine Speed Sensing Control Circuit Operation
Control Valve Operation
Control Valve Check Valves Identification and Operation
System Relief and Power Boost Valve Circuit Operation
Circuit Relief and Anticavitation Valve Operation
Pump Control Valve Operation
Propel Flow Combiner Valve Circuit Operation
Arm Regenerative Valve Circuit Operation
Boom Regenerative Valve Operation
Bucket Regenerative Valve Circuit Operation
Arm Rod End and Boom Reduced Leakage Valves Operation
Arm Head End Reduced Leakage Valve Operation
Boom Manual Lower Needle Valve Operation
Bucket Flow Rate Valve Operation
Propel Flow Rate Valve Operation
Bypass Shut-Off Valve Operation
Swing Gearbox Operation
Swing Motor, Crossover Relief Valve and Make-up Valve Operation
Swing Motor Park Brake Release Valve Operation
Rotary Manifold Operation
Propel Motor and Park Brake Valve Operation—330CLC (S.N. —082518)
Propel Motor and Park Brake Valve Operation—330CLC (S.N. 082519— )
Propel Speed Control Circuit Operation—330CLC
Propel Motor and Park Brake Valve Operation—370C
Propel Speed Control Circuit Operation—370C
Cylinder Operation
Hydraulic System Circuit Symbols
Hydraulic System Schematic
Diagnostic Procedure
Diagnose Electronic and Control Valve Component Malfunctions
Diagnose Hydraulic System Malfunctions
Diagnose Pilot Circuit Malfunctions
Diagnose Dig Circuit Malfunctions
Diagnose Swing Circuit Malfunctions
Diagnose Propel System Malfunctions
Diagnostic Display Unit (DDU) Operation
Engine Service Codes
Laptop Computer Connection To Engine Control Unit Using Service ADVISOR
Laptop Computer Connection To Pump and Valve Controller Using Service ADVISOR or Excavator Diagnostic Program
Excavator Diagnostic Program General Description and Overview
Reading Service Codes Without Laptop Computer
Monitor Display Diagnostic System Operation
Monitor Data Items
Pump and Valve Controller Service Codes
Alternator Test Procedure
Fuse Test
Pump and Valve Controller Pressure Sensors Test
Pump and Valve Controller Solenoids Test
Pump and Valve Controller Temperature Sensor Test
Engine Control Unit Pressure Sensors and Solenoids Test
Engine Control Unit Temperature Sensors Test
Engine Control Unit Speed Sensors Test
Engine Speed (N) Sensor Test
Electrical Component Checks
Remove and Install Batteries
Remove and Install Propel Alarm Cancel Switch
Remove and Install Key Switch
Remove and Install Travel Alarm
Remove and Install Windshield Wiper Enable Switch
Remove and Install Rear Cover
Remove and Install Switch Panel (A4)
Remove and Install Monitor Controller and Display (A5)
Disconnect Tab Retainer Connectors
Disconnecting Spring Wire Clip Connectors
Replace DEUTSCH DEUTSCH is a trademark of the Deutsch Co. Connectors
Install DEUTSCH DEUTSCH is a trademark of the Deutsch Co. Contacts
Replace WEATHER PACK WEATHER PACK is a trademark of Packard Electric. Connector
Install WEATHER PACK WEATHER PACK is a trademark of Packard Electric. Contacts
Remove Connector Body from Blade Terminals
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Section 9020: Power Train
Section 9025: Hydraulic System
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Table of Contents

5. Air Conditioning System Cycle Of Operation
Diagnose Air Conditioning System Malfunctions
Diagnose Heater System Malfunctions
Air Conditioner and Heater Diagnostic System Operation
Air Temperature Is Uncontrollable
Vent Control System Is Inoperable
Fresh Air or Recirculated Air Control System is Inoperable
Air Volume is Uncontrollable
Air Conditioner Controller Diagnostic Trouble Codes
21 - Mix Door Open Circuit
-21 - Mix Door Short Circuit
22 - Mode Encoder Open Circuit
23 - In-Cab Ambient Temperature Sensor Open Circuit
-23 - In-Cab Ambient Temperature Sensor Short Circuit
24 - Outdoor Ambient Temperature Sensor Open Circuit
-24 - Outdoor Ambient Temperature Sensor Short Circuit
25 - Coolant Temperature Sensor Open Circuit
-25 - Coolant Temperature Sensor Short Circuit
26 - Solar Radiation Sensor Open Circuit
-26 - Solar Radiation Sensor Short Circuit
Heating and Air Conditioner Component Location
Heating and Air Conditioning System Checks
R134a Air Conditioning System Test
Air Conditioning Compressor Clutch Test
Refrigerant Leak Test
Refrigerant Hoses and Tubing Inspection
Air Conditioner and Heater Sensors Test
Control Valve Line Identification
Main Hydraulic System Component Location
Pilot Controllers-to-Flow Regulator Valve Component Location—Excavator Pattern
Pilot Controllers-to-Flow Regulator Valve Component Location—Backhoe Pattern
Pilot Flow Regulator Valve-to-Control Valve Component Location
Propel Hydraulic System Component Location
JT05801 Clamp-On Electronic Tachometer Installation
JT05800 Digital Thermometer Installation
JT02156A Digital Pressure/Temperature Analyzer Installation
Hydraulic Oil Filter Inspection Procedure
Hydraulic Oil Cleanup Procedure Using Portable Filter Caddy
Hydraulic System Warm-Up Procedure
Cylinder Drift Test—Boom, Arm and Bucket
Pilot Pressure Regulating Valve Test and Adjustment
Control Valve Spool Pilot Actuation Pressure Test
System Relief and Power Boost Valve Test and Adjustment
Arm Reduced Leakage Relief Valve Test And Adjustment
Circuit Relief Valve Test and Adjustment
Swing Motor Crossover Relief Valve Test and Adjustment
Propel Motor Crossover Relief Valve Test and Adjustment—330CLC (S.N. —082518)
Propel Motor Crossover Relief Valve Test and Adjustment—330CLC (S.N. 082519— )
Propel Motor Crossover Relief Valve Test and Adjustment—370C
Power Boost, Propel Speed, and Arm Regenerative Solenoid Valve Test and Adjustment
Pump Control Valve Test
Hydraulic Pump Regulator Test and Adjustment—Minimum Flow—330CLC
Hydraulic Pump Regulator Test and Adjustment—Minimum Flow—370C
Hydraulic Pump Regulator Test and Adjustment—Maximum Flow—330CLC
Hydraulic Pump Regulator Test and Adjustment—Maximum Flow—370C
Hydraulic Pump Regulator Test and Adjustment—Engine Pulldown
Hydraulic Pump Flow Test
Swing Motor Leakage Test
Propel Motor Leakage Test—330CLC (S.N. —082518)
Propel Motor Leakage Test—330CLC (S.N. 082519— )
Propel Motor Leakage Test—370C
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Group 25: Tests
Group 25: Tests
Group 05: Theory Of Operation
Group 15: Diagnostic Information
Group 99: Dealer Fabricated Tools
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Section 9900: Dealer Fabricated Tools
Section 9031: Heating and Air Conditioning 18
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DFT1218 Split Flange Hose Cap
Foreword
Technical Information Feedback Form
Recognize Safety Information
Recognize Safety Information
Recognize Safety Information
Follow Safety Instructions
Operate Only If Qualified
Wear Protective Equipment
Avoid Unauthorized Machine Modifications
Add Cab Guarding for Special Uses
Inspect Machine
Stay Clear of Moving Parts
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Table of Contents
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6. Electrical Diagram Information
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Table of Contents
Avoid High-Pressure Oils
Beware of Exhaust Fumes
Prevent Fires
Prevent Battery Explosions
Handle Chemical Products Safely
Dispose of Waste Properly
Prepare for Emergencies
Use Steps and Handholds Correctly
Start Only From Operator's Seat
Use and Maintain Seat Belt
Prevent Unintended Machine Movement
Avoid Work Site Hazards
Keep Riders Off Machine
Avoid Backover Accidents
Avoid Machine Tip Over
Use Special Care When Lifting Objects
Add and Operate Attachments Safely
Park and Prepare for Service Safely
Service Cooling System Safely
Remove Paint Before Welding or Heating
Make Welding Repairs Safely
Drive Metal Pins Safely
Operational Checkout
Operational Checkout
Operational Checkout
Engine Speed Control System Operation
Engine RPM Dial
Hydraulic Oil Warm-up
Engine Speed Control System Operation
Engine RPM Dial
Hydraulic Oil Warm-up
Engine Speed Control System Operation
Engine RPM Dial
Hydraulic Oil Warm-up
Diagnose Engine Malfunctions
Diagnose Engine Malfunctions
Engine Speed Test
Engine Speed Test
Fuel Line Leakage Test
Air Filter Restriction Indicator Switch Test
Air Intake System Leakage Test
Radiator Air Flow Test
Engine Power Test Using Turbocharger Boost Pressure
Electrical Diagram Information
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System Functional Schematic Diagram
Wiring Diagram—If Provided
Component Location Diagram
Connector End View Diagram—If Provided
Electrical Schematic Symbols
System Functional Schematic Diagram
Wiring Diagram—If Provided
Component Location Diagram
Connector End View Diagram—If Provided
Electrical Schematic Symbols
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Table of Contents
241
Explanation of Wire Markings247
Explanation of Wire Markings248
Fuse Specifications249
System Functional Schematic and Master Legend251
Overall Machine Harnesses Component Location Diagram259
Cab Harness (W1) and Alternator Relay Sub-Harness (W11) Component Location Diagram261
Cab Harness (W1) and Alternator Relay Sub-Harness (W11) Component Location Diagram—
Harness Connectors265
Engine Harness (W2) Component Location Diagram267
Engine Harness (W2) Component Location Diagram—Harness Connectors269
Monitor Harness (W3) and Windshield Wiper Motor Sub-Harness (W6) Component Location
Diagram 271
Monitor Harness (W3) and Windshield Wiper Motor Sub-Harness (W6) Component Location
Diagram—Harness Connectors274
Air Conditioner and Heater Harness (W7) Component Location276
Air Conditioner and Heater Harness (W7) Wiring Diagram278
Pump Harness (W12) Component Location Diagram279
Pump Harness (W12) Component Location Diagram—Harness Connectors281
Engine Control Unit Harness (W19) Component Location Diagram282
Engine Control Unit Harness (W19) Component Location Diagram—Harness Connectors284
Engine Control Unit Engine Harness (W20) Component Location Diagram286
Engine Control Unit Engine Harness (W20) Component Location—Harness Connectors288
Fuel Injector Harness (W22) Component Location Diagram289
Fuel Injector Harness (W22) Component Location Diagram—Harness Connectors290
Starting and Charging Circuit Theory of Operation291
Start Circuit291
Charging Circuit291
Starting and Charging Circuit Theory of Operation293
Start Circuit293
Charging Circuit293
Travel Alarm Circuit Theory of Operation295
Monitor Controller and Display Circuit Theory of Operation297
System Functional Schematic Diagram
Wiring Diagram—If Provided
Component Location Diagram
Connector End View Diagram—If Provided
Electrical Schematic Symbols
HOUR METER AND GAUGES
STATUS INDICATORS
Air Filter Restriction Indicator Light (H33)
Fuel Level Indicator Light (H13)
Engine Coolant Temperature Indicator Light
(H32) Engine Coolant Temperature Gauge Sender
(B9) Engine Oil Pressure Indicator Light (H17)
Engine Coolant Level Indicator Light (H11)
Engine Oil Level Indicator Light (H19)
Alternator Voltage Indicator Light (H18)
Monitor Controller and Display Alarm (H8)
Check Engine Indicator Light (H10)
CONTROL SWITCHES AND INDICATORS
Windshield Wiper and Washer Switch (S9)
Work Light Switch (S6)
Propel Speed Switch (S8) Auto-Idle/Auto-
Acceleration Switch (S13)
Power Mode Switch (S12)
Work Mode Switch (S27)
Engine RPM Dial (R10)
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8. Diagnostic Display Unit (DDU) Operation
Pump and Valve Controller Circuit Theory of Operation
Table of Contents
Engine Control Unit Circuit Theory of Operation
Windshield Wiper And Washer Circuit Theory of Operation
Air Conditioner and Heater Controller Circuit Theory of Operation
Diagnostic Display Unit (DDU) Operation
Engine Service Codes
Laptop Computer Connection To Engine Control Unit Using Service ADVISOR
Laptop Computer Connection To Pump and Valve Controller Using Service ADVISOR or
Excavator Diagnostic Program
Excavator Diagnostic Program General Description and Overview
Troubleshooting
Reading Service Codes Without Laptop Computer
Monitor Display Diagnostic System Operation
Monitor Data Items
Pump and Valve Controller Service Codes
Alternator Test Procedure
12 V System
24 V System
Fuse Test
Pump and Valve Controller Pressure Sensors Test
Pump and Valve Controller Solenoids Test
Pump and Valve Controller Temperature Sensor Test
Engine Control Unit Pressure Sensors and Solenoids Test
Engine Control Unit Temperature Sensors Test
Engine Control Unit Speed Sensors Test
Engine Speed (N) Sensor Test
Electrical Component Checks
Remove and Install Batteries
Remove and Install Propel Alarm Cancel Switch
Remove and Install Key Switch
Remove and Install Travel Alarm
Remove and Install Windshield Wiper Enable Switch
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Accessing Menu
Viewing Active Service Codes
Access Stored Codes
Clearing Active Or Stored Service Codes From Diagnostic Display Unit Memory
Accessing Menu
Viewing Active Service Codes
Access Stored Codes
Clearing Active Or Stored Service Codes From Diagnostic Display Unit Memory
Engine Speed Control
Coolant Overheat Sensor (B46)
Manifold Air Temperature Sensor (B5)
Fuel Temperature Sensor (B6)
Water in Fuel Sensor (B7)
Fuel Rail Pressure Sensor (B10)
Crankshaft Sensor (B3)
Camshaft Sensor (B4)
High Pressure Fuel Pump (Solenoid 1) (Y7) and High Pressure Fuel Pump (Solenoid 2) (Y8)
Electronic Fuel Injectors (Y11—Y16)
Pump and Valve Controller (A7)
Pump and Valve Controller Sensors
Pump and Valve Controller Solenoids
Windshield Wiper Continuous Operation
Windshield Wiper Intermittent Operation
Windshield Wiper Park Operation
Windshield Washer Operation
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9. Circuit Relief and Anticavitation Valve Operation
Pump Control Valve Operation
Propel Flow Combiner Valve Circuit Operation
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Engine Speed Sensing Control Circuit Operation
Control Valve Operation
Control Valve Check Valves Identification and Operation
System Relief and Power Boost Valve Circuit Operation
Table of Contents
Remove and Install Rear Cover
Remove and Install Switch Panel (A4)
Remove and Install Monitor Controller and Display (A5)
Disconnect Tab Retainer Connectors
Disconnecting Spring Wire Clip Connectors
Replace DEUTSCH ™ Connectors
Install DEUTSCH ™ Contacts
Replace WEATHER PACK ™ Connector
Install WEATHER PACK ™ Contacts
Remove Connector Body from Blade Terminals
Track Adjuster And Recoil Spring Operation
Track Adjuster And Recoil Spring Operation
Track Adjuster And Recoil Spring Operation
Propel Gearbox Operation—330CLC (S.N. —082518)
Propel Gearbox Operation—330CLC (S.N. 082519— )
Propel Gearbox Operation—370C
Diagnose Undercarriage Components Malfunctions
Diagnose Undercarriage Components Malfunctions
Measure Swing Bearing Wear
Hydraulic System Diagram and Operation
Hydraulic Oil Return Filter
Hydraulic System Diagram and Operation
Hydraulic Oil Return Filter
Hydraulic System Diagram and Operation
Hydraulic Oil Return Filter
Pilot System Diagram and Operation
Pilot Pump, Pressure Regulating Valve, and Filter Operation
Pilot Shut-Off Valve Operation
Pilot Controller Operation
Propel Pilot Controller Operation
Flow Regulator Valve and Warm-Up Circuit Operation
Flow Regulator Valve
Warm-Up Circuit
Hydraulic Pumps and Drive Gearbox Operation
Hydraulic Pump Regulator Operation
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System Relief and Power Boost Valve
Power Boost and Auto-Power Lift Control Circuit Operation
Power Boost Solenoid Valve (SG)
Hydraulic Pump Regulator Component Identification
Hydraulic Pump Regulator Control by Pump 1 (Front) and Pump 2 (Rear) Control Valve
Decreasing Flow Rate (Displacement)
Hydraulic Pump Regulator Control By Supply Oil Pressure
Hydraulic Pump Regulator Control By Speed Sensing Pilot Oil
Speed Sensing Control
Slow Speed Sensing
Control Valve Neutral and Power Passages Operation
Dig and Propel Pilot Pressure Signal Passages
Control Valve Pilot Circuit
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10. Propel Speed Control Circuit Operation—370C
Propel Motor and Park Brake Valve Operation—370C
Table of Contents
Arm Regenerative Valve Circuit Operation
Arm Regenerative Solenoid Valve (SC)
Boom Regenerative Valve Operation
Bucket Regenerative Valve Circuit Operation
Arm Rod End and Boom Reduced Leakage Valves Operation
Arm Head End Reduced Leakage Valve Operation
Boom Manual Lower Needle Valve Operation
Bucket Flow Rate Valve Operation
Propel Flow Rate Valve Operation
Bypass Shut-Off Valve Operation
Swing Gearbox Operation
Swing Motor, Crossover Relief Valve and Make-up Valve Operation
Swing Motor Park Brake Release Valve Operation
Rotary Manifold Operation
Propel Motor and Park Brake Valve Operation—330CLC (S.N. —082518)
Propel Motor and Park Brake Valve Operation—330CLC (S.N. 082519— )
Propel Speed Control Circuit Operation—330CLC
Cylinder Operation
Hydraulic System Circuit Symbols
Hydraulic System Schematic
Diagnostic Procedure
Diagnostic Procedure
Diagnose Electronic and Control Valve Component Malfunctions
Diagnose Hydraulic System Malfunctions
Diagnose Pilot Circuit Malfunctions
Diagnose Dig Circuit Malfunctions
Diagnose Swing Circuit Malfunctions
Diagnose Propel System Malfunctions
Control Valve Line Identification
Main Hydraulic System Component Location
Pilot Controllers-to-Flow Regulator Valve Component Location—Excavator Pattern
Pilot Controllers-to-Flow Regulator Valve Component Location—Backhoe Pattern
Pilot Flow Regulator Valve-to-Control Valve Component Location
Propel Hydraulic System Component Location
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Swing Motor
Swing Motor Crossover Relief Valve
Swing Motor Make-Up Valves
Propel Motor and Park Brake Valve Housing
Propel Motor Slow and Fast Speed
Propel Motor Park Brake Release Circuit
Propel Motor Counterbalance Valve
Propel Motor Slow Speed Operation
Propel Motor Fast Speed Operation
Propel Speed Solenoid Valve (SI)
Propel Motor and Park Brake Valve Housing Components
Propel Motor and Park Brake Valve Components
Propel Motor Slow Speed Operation
Propel Motor Fast Speed Operation
Counterbalance Valve
Propel Motor Crossover Relief Valves
Propel Motor Park Brake
Slow Speed (Turtle) Propel Mode
Fast Speed (Rabbit) Propel Mode
Propel Speed Solenoid Valve (SI)
52
2
52
3
52
4
53
1
53
4
53
6
53
7
54
8
54
8
54
9
55
1
55
2
55
2
55
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55
4
55
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56
0
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3
56
3
56
4

11. Heating and Air Conditioning System Checks
11
Air Conditioner Controller Diagnostic Trouble Codes
Heating and Air Conditioner Component Location
Heating and Air Conditioning System Checks
Table of Contents
JT05801 Clamp-On Electronic Tachometer Installation
JT05801 Clamp-On Electronic Tachometer Installation
JT05800 Digital Thermometer Installation
JT02156A Digital Pressure/Temperature Analyzer Installation
Hydraulic Oil Filter Inspection Procedure
Hydraulic Oil Cleanup Procedure Using Portable Filter Caddy
Hydraulic System Warm-Up Procedure
Cylinder Drift Test—Boom, Arm and Bucket
Pilot Pressure Regulating Valve Test and Adjustment
Control Valve Spool Pilot Actuation Pressure Test
System Relief and Power Boost Valve Test and Adjustment
Arm Reduced Leakage Relief Valve Test And Adjustment
Circuit Relief Valve Test and Adjustment
Swing Motor Crossover Relief Valve Test and Adjustment
Propel Motor Crossover Relief Valve Test and Adjustment—330CLC (S.N. —082518)
Propel Motor Crossover Relief Valve Test and Adjustment—330CLC (S.N. 082519— )
Propel Motor Crossover Relief Valve Test and Adjustment—370C
Power Boost, Propel Speed, and Arm Regenerative Solenoid Valve Test and Adjustment
Pump Control Valve Test
Hydraulic Pump Regulator Test and Adjustment—Minimum Flow—330CLC
Hydraulic Pump Regulator Test and Adjustment—Minimum Flow—370C
Hydraulic Pump Regulator Test and Adjustment—Maximum Flow—330CLC
Hydraulic Pump Regulator Test and Adjustment—Maximum Flow—370C
Hydraulic Pump Regulator Test and Adjustment—Engine Pulldown
Hydraulic Pump Flow Test
Swing Motor Leakage Test
Propel Motor Leakage Test—330CLC (S.N. —082518)
Propel Motor Leakage Test—330CLC (S.N. 082519— )
Propel Motor Leakage Test—370C
Air Conditioning System Cycle Of Operation
Air Conditioning System Cycle Of Operation
Air Conditioning System Cycle Of Operation
Diagnose Air Conditioning System Malfunctions
Diagnose Air Conditioning System Malfunctions
Diagnose Heater System Malfunctions
Air Conditioner and Heater Diagnostic System Operation
61
8
61
9
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0
62
1
62
2
62
3
62
5
62
8
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0
63
4
63
6
64
0
64
3
64
7
65
1
65
4
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66
9
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7
68
0
68
3
68
7
69
1
69
4
73
5
75
8
75
9
761
All Lines and Hoses
Air Conditioner Compressor Check
Condenser Check
Heater/Evaporator Core Check
Freeze Control Switch Capillary Tube Check
Cab Door and Window Seals Check
Filter Check
Step 0 Model Number
Step 1 Display Check
Step 2 Current Service Codes
Step 3 Past Service Codes
Step 4 Sensor Temperature
Step 5 Component Operation Check
Step 6.1 Correction of the Set Temperature
Step 6.2 Selection of Celsius and Fahrenheit Temperature Indication
71
8
71
8
71
8
71
8
71
9
71
9
72
1
72
2
75
9
75
9
75
9
76
0
76
0
76

12. All Lines and Hoses
Air Conditioner Compressor Check
Condenser Check
Heater/Evaporator Core Check
Freeze Control Switch Capillary Tube Check
Cab Door and Window Seals Check
Filter Check
76
1
76
1
76
1
76
2
76
2
76
2
76
2
R134a Air Conditioning System Test
Air Conditioning Compressor Clutch Test
Refrigerant Leak Test
Refrigerant Hoses and Tubing
Inspection Air Conditioner and Heater
Sensors Test DFT1218 Split Flange
Hose Cap DFT1218 Split Flange Hose
Cap DFT1218 Split Flange Hose Cap
12
Table of Contents
76
3
76
7
76
8
76
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0
77
2
77
3
77
4

13. tm1926 - 330CLC and 370C Excavator
Table of Contents
Foreword
Technical Information Feedback
Form Section 9000: General
Information
Group 01: Safety
Recognize Safety Information
Follow Safety Instructions
Operate Only If Qualified
Wear Protective Equipment
Avoid Unauthorized Machine
Modifications Add Cab Guarding for
Special Uses
Inspect Machine
Stay Clear of Moving Parts
Avoid High-Pressure Oils
Beware of Exhaust Fumes
Prevent Fires
Prevent Battery Explosions
Handle Chemical Products Safely
Dispose of Waste Properly
Prepare for Emergencies
Use Steps and Handholds Correctly
Start Only From Operator's Seat
Use and Maintain Seat Belt
Prevent Unintended Machine Movement
Avoid Work Site Hazards
Keep Riders Off Machine
Avoid Backover Accidents
Avoid Machine Tip Over
Use Special Care When Lifting Objects
Add and Operate Attachments Safely
13
Table of Contents

14. Operational Checkout
Electrical Diagram Information
Diagnose Engine Malfunctions
Engine Speed Control System Operation
Park and Prepare for Service Safely
Service Cooling System Safely
Remove Paint Before Welding or
Heating Make Welding Repairs Safely
Drive Metal Pins Safely
Engine Speed Test
Fuel Line Leakage Test
Air Filter Restriction Indicator Switch Test
Air Intake System Leakage Test
Radiator Air Flow Test
Engine Power Test Using Turbocharger Boost Pressure
Explanation of Wire Markings
Fuse Specifications
System Functional Schematic and Master Legend
Overall Machine Harnesses Component Location Diagram
Cab Harness (W1) and Alternator Relay Sub-Harness (W11) Component Location Diagram
Cab Harness (W1) and Alternator Relay Sub-Harness (W11) Component Location Diagram—
Harness Connectors
Engine Harness (W2) Component Location Diagram
Section 9010: Engine
Section 9015: Electrical System
Section 9005: Operational Checkout Procedure
Group 25: Tests
Group 10: System Diagrams
Group 05: System Information
Group 05: Theory of Operation
Group 15: Diagnostic Information
Group 10: Operational Checkout Procedure
14
Table of Contents

15. Starting and Charging Circuit Theory of Operation
Travel Alarm Circuit Theory of Operation
Monitor Controller and Display Circuit Theory of Operation
Engine Control Unit Circuit Theory of Operation
Pump and Valve Controller Circuit Theory of Operation
Windshield Wiper And Washer Circuit Theory of Operation
Air Conditioner and Heater Controller Circuit Theory of Operation
Diagnostic Display Unit (DDU) Operation
Engine Service Codes
Laptop Computer Connection To Engine Control Unit Using Service ADVISOR
Laptop Computer Connection To Pump and Valve Controller Using Service ADVISOR or
Excavator Diagnostic Program
Excavator Diagnostic Program General Description and Overview
Reading Service Codes Without Laptop Computer
Monitor Display Diagnostic System Operation
Monitor Data Items
Pump and Valve Controller Service Codes
Engine Harness (W2) Component Location Diagram—Harness Connectors
Monitor Harness (W3) and Windshield Wiper Motor Sub-Harness (W6) Component Location
Diagram
Monitor Harness (W3) and Windshield Wiper Motor Sub-Harness (W6) Component Location
Diagram—Harness Connectors
Air Conditioner and Heater Harness (W7) Component Location
Air Conditioner and Heater Harness (W7) Wiring Diagram
Pump Harness (W12) Component Location Diagram
Pump Harness (W12) Component Location Diagram—Harness Connectors
Engine Control Unit Harness (W19) Component Location Diagram
Engine Control Unit Harness (W19) Component Location Diagram—Harness Connectors
Engine Control Unit Engine Harness (W20) Component Location Diagram
Engine Control Unit Engine Harness (W20) Component Location—Harness Connectors
Fuel Injector Harness (W22) Component Location Diagram
Fuel Injector Harness (W22) Component Location Diagram—Harness Connectors
Group 20: References
Group 15: Sub-System Diagnostics
15
Table of Contents

16. Track Adjuster And Recoil Spring Operation
Propel Gearbox Operation—330CLC (S.N. —082518)
Propel Gearbox Operation—330CLC (S.N. 082519—
) Propel Gearbox Operation—370C
Alternator Test Procedure
Fuse Test
Pump and Valve Controller Pressure Sensors Test
Pump and Valve Controller Solenoids Test
Pump and Valve Controller Temperature Sensor Test
Engine Control Unit Pressure Sensors and Solenoids Test
Engine Control Unit Temperature Sensors Test
Engine Control Unit Speed Sensors Test
Engine Speed (N) Sensor Test
Electrical Component Checks
Remove and Install Batteries
Remove and Install Propel Alarm Cancel Switch
Remove and Install Key Switch
Remove and Install Travel Alarm
Remove and Install Windshield Wiper Enable Switch
Remove and Install Rear Cover
Remove and Install Switch Panel (A4)
Remove and Install Monitor Controller and Display (A5)
Disconnect Tab Retainer Connectors
Disconnecting Spring Wire Clip Connectors
Replace DEUTSCH DEUTSCH is a trademark of the Deutsch Co. Connectors
Install DEUTSCH DEUTSCH is a trademark of the Deutsch Co. Contacts
Replace WEATHER PACK WEATHER PACK is a trademark of Packard Electric. Connector
Install WEATHER PACK WEATHER PACK is a trademark of Packard Electric. Contacts
Remove Connector Body from Blade Terminals
Section 9020: Power Train
Group 05: Theory of Operation
Group 15: Diagnostic Information
16
Table of Contents

17. Diagnose Undercarriage Components Malfunctions
Measure Swing Bearing Wear
Hydraulic System Diagram and Operation
Pilot System Diagram and Operation
Pilot Pump, Pressure Regulating Valve, and Filter Operation
Pilot Shut-Off Valve Operation
Pilot Controller Operation
Propel Pilot Controller Operation
Flow Regulator Valve and Warm-Up Circuit Operation
Hydraulic Pumps and Drive Gearbox Operation
Hydraulic Pump Regulator Operation
Engine Speed Sensing Control Circuit Operation
Control Valve Operation
Control Valve Check Valves Identification and Operation
System Relief and Power Boost Valve Circuit Operation
Circuit Relief and Anticavitation Valve Operation
Pump Control Valve Operation
Propel Flow Combiner Valve Circuit Operation
Arm Regenerative Valve Circuit Operation
Boom Regenerative Valve Operation
Bucket Regenerative Valve Circuit Operation
Arm Rod End and Boom Reduced Leakage Valves Operation
Arm Head End Reduced Leakage Valve Operation
Boom Manual Lower Needle Valve Operation
Bucket Flow Rate Valve Operation
Propel Flow Rate Valve Operation
Bypass Shut-Off Valve Operation
Swing Gearbox Operation
Swing Motor, Crossover Relief Valve and Make-up Valve
Operation Swing Motor Park Brake Release Valve Operation
Section 9025: Hydraulic System
Group 05: Theory Of Operation
17
Table of Contents

18. JT05801 Clamp-On Electronic Tachometer Installation
JT05800 Digital Thermometer Installation
JT02156A Digital Pressure/Temperature Analyzer
Installation Hydraulic Oil Filter Inspection Procedure
Hydraulic Oil Cleanup Procedure Using Portable Filter
Caddy Hydraulic System Warm-Up Procedure
Cylinder Drift Test—Boom, Arm and Bucket
Pilot Pressure Regulating Valve Test and Adjustment
Control Valve Spool Pilot Actuation Pressure Test
Rotary Manifold Operation
Propel Motor and Park Brake Valve Operation—330CLC (S.N. —082518)
Propel Motor and Park Brake Valve Operation—330CLC (S.N. 082519—
) Propel Speed Control Circuit Operation—330CLC
Propel Motor and Park Brake Valve Operation—370C
Propel Speed Control Circuit Operation—370C
Cylinder Operation
Hydraulic System Circuit Symbols
Hydraulic System Schematic
Diagnostic Procedure
Diagnose Electronic and Control Valve Component Malfunctions
Diagnose Hydraulic System Malfunctions
Diagnose Pilot Circuit Malfunctions
Diagnose Dig Circuit Malfunctions
Diagnose Swing Circuit Malfunctions
Diagnose Propel System Malfunctions
Control Valve Line Identification
Main Hydraulic System Component Location
Pilot Controllers-to-Flow Regulator Valve Component Location—Excavator Pattern
Pilot Controllers-to-Flow Regulator Valve Component Location—Backhoe Pattern
Pilot Flow Regulator Valve-to-Control Valve Component Location
Propel Hydraulic System Component Location
Group 25: Tests
Group 15: Diagnostic Information
18
Table of Contents

19. Air Conditioning System Cycle Of Operation
Diagnose Air Conditioning System Malfunctions
Diagnose Heater System Malfunctions
Air Conditioner and Heater Diagnostic System Operation
Air Temperature Is Uncontrollable
Vent Control System Is Inoperable
Fresh Air or Recirculated Air Control System is
Inoperable Air Volume is Uncontrollable
Air Conditioner Controller Diagnostic Trouble Codes
21 - Mix Door Open Circuit
System Relief and Power Boost Valve Test and Adjustment
Arm Reduced Leakage Relief Valve Test And Adjustment
Circuit Relief Valve Test and Adjustment
Swing Motor Crossover Relief Valve Test and Adjustment
Propel Motor Crossover Relief Valve Test and Adjustment—330CLC (S.N. —082518)
Propel Motor Crossover Relief Valve Test and Adjustment—330CLC (S.N. 082519— )
Propel Motor Crossover Relief Valve Test and Adjustment—370C
Power Boost, Propel Speed, and Arm Regenerative Solenoid Valve Test and
Adjustment Pump Control Valve Test
Hydraulic Pump Regulator Test and Adjustment—Minimum Flow—330CLC
Hydraulic Pump Regulator Test and Adjustment—Minimum Flow—370C
Hydraulic Pump Regulator Test and Adjustment—Maximum Flow—330CLC
Hydraulic Pump Regulator Test and Adjustment—Maximum Flow—370C
Hydraulic Pump Regulator Test and Adjustment—Engine Pulldown
Hydraulic Pump Flow Test
Swing Motor Leakage Test
Propel Motor Leakage Test—330CLC (S.N. —082518)
Propel Motor Leakage Test—330CLC (S.N. 082519— )
Propel Motor Leakage Test—370C
Section 9031: Heating and Air Conditioning
Group 05: Theory Of Operation
Group 15: Diagnostic Information
19
Table of Contents

20. DFT1218 Split Flange Hose Cap
Heating and Air Conditioning System Checks
R134a Air Conditioning System Test
Air Conditioning Compressor Clutch Test
Refrigerant Leak Test
Refrigerant Hoses and Tubing Inspection
Air Conditioner and Heater Sensors Test
-21 - Mix Door Short Circuit
22 - Mode Encoder Open Circuit
23 - In-Cab Ambient Temperature Sensor Open Circuit
-23 - In-Cab Ambient Temperature Sensor Short Circuit
24 - Outdoor Ambient Temperature Sensor Open Circuit
-24 - Outdoor Ambient Temperature Sensor Short Circuit
25 - Coolant Temperature Sensor Open Circuit
-25 - Coolant Temperature Sensor Short Circuit
26 - Solar Radiation Sensor Open Circuit
-26 - Solar Radiation Sensor Short Circuit
Heating and Air Conditioner Component Location
Group 25: Tests
Group 99: Dealer Fabricated Tools
Section 9900: Dealer Fabricated Tools
20
Table of Contents

21. Foreword
21
This manual is written for an experienced technician. Essential tools required in performing certain service
work are identified in this manual and are recommended for use.
Live with safety: Read the safety messages in the introduction of this manual and the cautions presented
throughout the text of the manual.
This is the safety-alert symbol. When you see this symbol on the machine or in this manual, be alert to the
potential for personal injury.
Technical manuals are divided in two parts: repair and operation and tests. Repair sections tell how to repair the
components. Operation and tests sections help you identify the majority of routine failures quickly.
Information is organized in groups for the various components requiring service instruction. At the beginning of
each group are summary listings of all applicable essential tools, service equipment and tools, other materials
needed to do the job, service parts kits, specifications, wear tolerances, and torque values.
Technical Manuals are concise guides for specific machines. They are on-the-job guides containing only the vital
information needed for diagnosis, analysis, testing, and repair.
Fundamental service information is available from other sources covering basic theory of operation, fundamentals
of troubleshooting, general maintenance, and basic type of failures and their causes.
CAUTION:
DX,TMIFC-19-20140415

22. Technical Information Feedback Form
22
SEND TO:
Name:
Phone:
Email
Address:
THANK YOU!
FAX NUMBER:
Publication
Number: Page
Number:
Ideas, Comments:
John Deere Dubuque Works
18600 South John Deere Road
Attn: Publications, Dept. 324
Dubuque, IA 52004-0538
USA
1-563-589-5800 (USA)
We need your help to continually improve our technical publications. Please copy this page and FAX or mail
your comments, ideas and improvements.
-: Technical Manual Fax
TX,TM,FAX-19-20010703

23. Recognize Safety Information
23
T133588-19: Safety Alert Symbols
T133555-UN: Safety Alert Symbols
This is the safety alert symbol. When this symbol is noticed on the machine or in this manual, be alert for the
potential of personal injury.
Follow the precautions and safe operating practices highlighted by this symbol.
A signal word — DANGER, WARNING, or CAUTION — is used with the safety alert symbol. DANGER identifies
the most serious hazards.
On the machine, DANGER signs are red in color, WARNING signs are orange, and CAUTION signs are yellow.
DANGER and WARNING signs are located near specific hazards. General precautions are on CAUTION labels.
TX03679,00016CC-19-20070103

24. Recognize Safety Information
24
T133588-19: Safety Alert Symbols
T133555-UN: Safety Alert Symbols
This is the safety alert symbol. When this symbol is noticed on the machine or in this manual, be alert for the
potential of personal injury.
Follow the precautions and safe operating practices highlighted by this symbol.
A signal word — DANGER, WARNING, or CAUTION — is used with the safety alert symbol. DANGER identifies
the most serious hazards.
On the machine, DANGER signs are red in color, WARNING signs are orange, and CAUTION signs are yellow.
DANGER and WARNING signs are located near specific hazards. General precautions are on CAUTION labels.
TX03679,00016CC-19-20070103

25. Recognize Safety Information
25
T133588-19: Safety Alert Symbols
T133555-UN: Safety Alert Symbols
This is the safety alert symbol. When this symbol is noticed on the machine or in this manual, be alert for the
potential of personal injury.
Follow the precautions and safe operating practices highlighted by this symbol.
A signal word — DANGER, WARNING, or CAUTION — is used with the safety alert symbol. DANGER identifies
the most serious hazards.
On the machine, DANGER signs are red in color, WARNING signs are orange, and CAUTION signs are yellow.
DANGER and WARNING signs are located near specific hazards. General precautions are on CAUTION labels.
TX03679,00016CC-19-20070103

26. Follow Safety Instructions
26
T133556-UN: Follow Safety Instructions
Read the safety messages in this manual and on the machine. Follow these warnings and instructions
carefully. Review them frequently.
Be sure all operator's of this machine understand every safety message. Replace operator's manual and
safety labels immediately if missing or damaged.
TX03679,00016F9-19-20000828

27. Operate Only If Qualified
27
Do not operate this machine unless the operator's manual has been read carefully, and you have been
qualified by supervised training and instruction.
Operator should be familiar with the job site and surroundings before operating. Try all controls and machine
functions with the machine in an open area before starting to work.
Know and observe all safety rules that may apply to every work situation and work site.
TX03679,00016FA-19-20070103

28. Wear Protective Equipment
28
TS206-UN: Protective Equipment
Guard against injury from flying pieces of metal or debris; wear goggles or safety glasses.
Wear close fitting clothing and safety equipment appropriate to the job.
Prolonged exposure to loud noise can cause impairment or loss of hearing. Wear suitable hearing protection such
as earmuffs or earplugs to protect against objectionable or uncomfortable loud noises.
TX03679,00016D0-19-20070103

29. Avoid Unauthorized Machine Modifications
29
Modifications of this machine, or addition of unapproved products or attachments, may affect machine
stability or reliability, and may create a hazard for the operator or others near the machine.
Always contact an authorized dealer before making machine modifications that change the intended use,
weight or balance of the machine, or that alter machine controls, performance or reliability.
TX03679,00016B7-19-20001030

30. Add Cab Guarding for Special Uses
30
T133733-UN: Cab Guarding
Special work situations or machine attachments may create an environment with falling or flying objects. Working
near an overhead bank, doing demolition work, using a hydraulic hammer, or working in a wooded area, for
example, may require added guarding to protect the operator.
FOPS (falling object protective structures) and special screens or guarding should be installed when falling or
flying objects may enter or damage the machine. Contact your authorized dealer for information on devices
intended to provide protection in special work situations.
TX03679,00016CE-19-20070103

31. For the full PDF version of this
manual, Please click on the above
download PDF button.