Complete workshop repair service manual with electrical wiring diagrams for Caterpillar 308D CR Series Excavators. It's the same service manual used by dealers that guaranteed to be fully functional and intact without any missing page.

Caterpillar 308D CR Series Excavators service & repair manual (including maintenance, overhaul, disassembling & assembling, adjustment, tune-up, operation, inspecting, diagnostic & troubleshooting…) is divided into different sections. Each section covers a specific component or system with detailed illustrations. A table of contents is placed at the beginning of each section. Pages are easily found by category, and each page is expandable for great detail. The printer-ready PDF documents work like a charm on all kinds of devices.

892 pages, bookmarked, Searchable, Printable, high quality PDF

MANUAL LIST:
KENR6164 - Systems Operation (308D CR Excavator Hydraulic System).pdf
KENR6165 - Testing and Adjusting (308D CR Mini Hydraulic Excavator Hydraulic System).pdf
KENR6799 - Specifications (308D, 314D, 321D and 328D Excavators Air Conditioning and Heating).pdf
KENR6799 - Systems Operation (308D, 314D, 321D and 328D Excavators Air Conditioning and Heating).pdf
KENR6799 - Testing and Adjusting (308D, 314D, 321D and 328D Excavators Air Conditioning and Heating).pdf
KENR7708 - Schematic (308D Excavator Hydraulic System).pdf
KENR8224 - Schematic (308D CR SB Excavator Electrical System).pdf
RENR9740 - Disassembly and Assembly (308D CR Excavator Engine Supplement).pdf
RENR9741 - Disassembly and Assembly (308D CR Excavator Machine Systems).pdf
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 KENR6163 - Specifications (308D Excavator Machine System)
    Accumulator (Pilot)
    Air Conditioner Lines
    Auxiliary Hydraulic Lines - Long Stick
    Auxiliary Hydraulic Lines - Medium Pressure Long Stick
    Auxiliary Hydraulic Lines - Medium Pressure Medium Stick
    Auxiliary Hydraulic Lines - Medium Stick
    Blade Cylinder Lines
    Blade Lift Cylinder
    Blade Mounting
    Boom - 3.39 m (11.1 ft)
    Boom Cylinder Lines
    Boom Cylinder
    Boom Cylinder - Variable Angle
    Boom Lines
    Bucket Cylinder Lines
    Bucket Cylinder
    Bucket Linkage
    Cab
    Check Valve (Hydraulic Oil Cooler Bypass)
    Control Manifold (Pilot Oil)
    Counterweight
    Cylinder (Thumb)
    Engine Mounting
    Fasteners
    Final Drive
    Front Idler
    Front Lines
    Fuel Lines
    Fuel Tank
    Handle Control (Travel)
    Heater and Air Conditioner Mounting
    Hydraulic Tank and Filter
    Hydraulic Tank Mounting
    Joystick Control
    Main Hydraulic Pump Mounting
    Main Hydraulic Pump
    Operator Monitor
    Pilot Lines
    Pilot Valve (Joystick)
    Pilot Valve (Travel)
    Pump Coupling
    Recoil Spring
    Refrigerant Compressor Mounting
    Sprocket
    Stick Cylinder Lines
    Stick Cylinder
    Stick Lines - Long
    Stick Lines - Medium
    Stick - Long 2.21 m (7.3 ft)
    Stick - Medium 1.67 m (5.5 ft)
    Swing Boom Cylinder
    Swing Drive
    Swing Gear and Bearing
    Swivel
    Track Adjuster
    Track Carrier Roller
    Track
    Track Roller (Center Flange)
    Track Roller Mounting
    Track Roller (Single Flange)
    Travel Motor Guard
    Travel Motor Lines
    Upper Frame - Swing
    Wiring (Battery)
 KENR6164 - Systems Operation (308D CR Excavator Hydraulic System)
    Accumulator (Pilot)
    Blade Hydraulic System
    Bucket Hydraulic System
    Bypass Valve (Return) - Bypass Check Valve
    Check Valve (Load)
    Check Valve (Return Makeup) - Slow Return Check Valve
    Control Valve (Boom Lowering)
    Control Valve (Stick Lowering)
    Cylinders (Boom, Stick and Bucket)
    Displacement Change Valve
    Final Drive
    Gear Pump (Pilot)
    General Information
    Hydraulic Filter (Pilot)
    Hydraulic Oil Cooler
    Hydraulic Tank and Filter
    Main Control Valve
    Main Hydraulic Pump
    Main Hydraulic System
    Medium Pressure Hydraulic System
    Oil Makeup (Swing System)
    Oil Makeup (Travel System)
    One-Way Flow Hydraulic System
    Pilot Hydraulic System
    Pilot Valve (Joystick)
    Pilot Valve (Swing Parking Brake)
    Pilot Valve (Travel)
    Proportional Priority Pressure Compensation System - Metered Out
    Pump Control (Main Hydraulic)
    Relief Valve (Cushion Crossover) - Anti-Reaction Valve
    Relief Valve (Line)
    Relief Valve (Main)
    Relief Valve (Pilot)
    Relief Valve (Swing)
    Return Hydraulic System
    Solenoid Valve (Hydraulic Lockout)
    Stick Hydraulic System
    Swing Boom Hydraulic System
    Swing Drive
    Swing Hydraulic System
    Swing Motor
    Swivel
    Travel Counterbalance Valve
    Travel Hydraulic System
    Travel Motor
    Travel Parking Brake
    Two-Way Flow Hydraulic System
 KENR6165 - Testing and Adjusting (308D CR Mini Hydraulic Excavator Hydraulic System)
    Accumulator (Pilot) - Test and Charge
    Cylinder Drift - Check - Blade (If Equipped)
    Cylinder Drift - Check - Empty Bucket
    Cylinder Drift - Check - Loaded Bucket
    Cylinder Speed - Check - Blade (If Equipped)
    Cylinder Speed - Check - Boom Swing
    Cylinder Speed - Check
    Engine Performance - Test - Engine Speed
    Event Codes
    Gear Pump (Pilot) - Test
    General Testing and Adjusting Information
    Hydraulic System Air - Purge - Resonator Line
    Hydraulic System Pressure - Release
    Joystick Control - Calibrate - Slide Control
    Machine Drift on a Slope - Check
    Machine Tool Control System - Select
    Main Hydraulic Pump Air - Purge
    Main Pump (Flow) - Test
    Operational Checks
    Process for Setting Up the Work Tool
    Pump Control (Output Flow) - Adjust
    Relief Valve (Blade) - Test and Adjust - If Equipped
    Relief Valve (Line) - Test and Adjust - Boom and Stick Lowering Control Valves (If Equipped)
    Relief Valve (Line) - Test and Adjust
    Relief Valve (Main) - Test and Adjust
    Relief Valve (Pilot) - Test and Adjust
    Relief Valve (Swing) - Test and Adjust
    Solenoid Valve (Proportional Reducing) - Calibrate
    Specifications
    Swing Motor - Test - Measurement of Case Drain Oil
    Swing Speed and Overswing on Level Ground - Check
    Swing Speed and Swing Drift on a Slope - Check
    Travel Motor - Test - Measurement of Case Drain Oil
    Travel on Level Ground - Test - Optional Test
    Travel on Level Ground - Test
    Visual Inspection
    Work Tool Parameter - Default Values
    Work Tool Parameter - Program
    Work Tool - Select
 KENR6799 - Specifications (308D, 314D, 321D and 328D Excavators Air Conditioning and Heating)
    Air Conditioner Lines
    Blower Motor
    Pressure Switch (Refrigerant Pressure Cutoff)
    Refrigerant Compressor
    System Capacities for Refrigerant (Excavators) - 308D CR-328D CR
 KENR6799 - Systems Operation (308D, 314D, 321D and 328D Excavators Air Conditioning and Heating)
    Actuator (Air Conditioner Control)
    Air Conditioning and Heating System Sensor Operation
    Air Conditioning System
    Blower Motor
    Control Module
    Control Panel
    Evaporator Coil
    General Information
    Heater Core (Cab)
    Pressure Switch (Refrigerant Pressure Cutoff)
    Refrigerant Compressor
    Refrigerant Condenser
    Refrigerant Expansion Valve
    Refrigerant Receiver-Dryer
    Speed Control - Power Transistor
 KENR6799 - Testing and Adjusting (308D, 314D, 321D and 328D Excavators Air Conditioning and Heating)
    Actuator Troubleshooting - Abnormal Detection
    Actuator Troubleshooting - Guide for Actuators
    Air Conditioning System Troubleshooting - Guide for Sensors
    General Troubleshooting Information
    Machine Preparation for Troubleshooting
    Manifold Gauge Set (Refrigerant) - Install
    Manifold Gauge Set (Refrigerant) - Remove
    Refrigerant Compressor Oil - Check
    Refrigerant Leakage - Test
    Refrigerant Recovery
    Refrigerant System - Charge
    Refrigerant System - Evacuate
    Refrigerant System - Flush
    Required Tools
    Sensor Troubleshooting
    Visual Inspection
 KENR7708 - Schematic (308D Excavator Hydraulic System)
    Collage
    Main
 KENR8224 - Schematic (308D CR SB Excavator Electrical System)
    Collage
    Main
 RENR9740 - Disassembly and Assembly (308D CR Excavator Engine Supplement)
    Aftercooler - Remove and Install
    Air Cleaner - Remove and Install
    Alternator - Install
    Alternator - Remove
    Battery - Remove and Install
    Electric Starting Motor - Remove and Install
    Engine and Main Hydraulic Pump - Install
    Engine and Main Hydraulic Pump - Remove
    Engine Oil Filter and Oil Filter Base - Install
    Engine Oil Filter and Oil Filter Base - Remove
    Engine Oil Filter Base - Assemble
    Engine Oil Filter Base - Disassemble
    Fuel Filter and Water Separator Base - Remove and Install
    Hood - Remove and Install
    Hydraulic Oil Cooler - Remove and Install
    Muffler - Remove and Install
    Radiator and Hydraulic Oil Cooler - Install
    Radiator and Hydraulic Oil Cooler - Remove
    Radiator - Remove and Install
    Refrigerant Compressor - Remove and Install
    Refrigerant Condenser - Remove and Install
    System Pressure - Release
    Turbocharger - Install
    Turbocharger - Remove
    Water Temperature Regulator - Remove and Install
 RENR9741 - Disassembly and Assembly (308D CR Excavator Machine Systems)
     Accumulator - Remove and Install
     Blade Cylinder - Remove and Install
     Blade - Remove and Install
     Blower Motor (Air Conditioner, Heater) - Remove and Install
     Boom Cylinder - Remove and Install
     Bucket Cylinder - Remove and Install
     Bucket - Install
     Bucket Linkage - Install
     Bucket Linkage - Remove
     Bucket - Remove
     Cab - Install
     Cab - Remove
     Check Valve (Cooler Bypass) - Install
     Check Valve (Cooler Bypass) - Remove
     Check Valve (Slow Return) - Install
     Check Valve (Slow Return) - Remove
     Control Manifold (Pilot Oil) - Install
     Control Manifold (Pilot Oil) - Remove
     Counterweight - Remove and Install
     Duo-Cone Conventional Seals - Install
     Evaporator Coil - Install
     Evaporator Coil - Remove
     Final Drive and Travel Motor - Assemble
     Final Drive and Travel Motor - Disassemble
     Final Drive and Travel Motor - Install
     Final Drive and Travel Motor - Remove
     Front Idler and Recoil Spring - Install
     Front Idler and Recoil Spring - Remove
     Fuel Tank - Install
     Fuel Tank - Remove
     Gear Pump (Pilot) - Install
     Gear Pump (Pilot) - Remove
     Heater Core - Install
     Heater Core - Remove
     Heating and Air Conditioning Unit - Install
     Heating and Air Conditioning Unit - Remove
     Hydraulic Lockout Control - Install
     Hydraulic Lockout Control - Remove
     Hydraulic Tank - Install
     Hydraulic Tank - Remove
     Hydraulic Track Adjusters - Install
     Hydraulic Track Adjusters - Remove
     Main Control Valve - Assemble
     Main Control Valve - Disassemble
     Main Control Valve - Install
     Main Control Valve - Remove
     Main Hydraulic Pump - Assemble
     Main Hydraulic Pump - Disassemble
     Main Hydraulic Pump - Install
     Main Hydraulic Pump - Remove
     Oil Filter and Base - Remove and Install
     Pilot Valve (Alternate Pattern Control) - Remove and Install
     Pilot Valve (Blade) - Assemble
     Pilot Valve (Blade) - Disassemble
     Pilot Valve (Blade) - Install
     Pilot Valve (Blade) - Remove
     Pilot Valve (Joystick) - Assemble
     Pilot Valve (Joystick) - Disassemble
     Pilot Valve (Joystick) - Install
     Pilot Valve (Joystick) - Remove
     Pilot Valve (Travel) - Assemble
     Pilot Valve (Travel) - Disassemble
     Pilot Valve (Travel) - Install
     Pilot Valve (Travel) - Remove
     Receiver Dryer (Refrigerant) - Remove and Install
     Recoil Spring - Assemble
     Recoil Spring - Disassemble
     Relief Valve (Pilot) - Remove and Install
     Seat - Remove and Install
     Seat Support - Remove and Install
     Seat Suspension - Remove and Install
     Solenoid Valve (Hydraulic Lockout) - Remove and Install
     Solenoid Valve (Swing Boom) - Assemble
     Solenoid Valve (Swing Boom) - Disassemble
     Solenoid Valve (Swing Boom) - Install
     Solenoid Valve (Swing Boom) - Remove
     Solenoid Valve (Travel Speed) - Remove and Install
     Solenoid Valve (Two-Way Flow and One Pump_Two Pump) - Assemble
     Solenoid Valve (Two-Way Flow and One Pump_Two Pump) - Disassemble
     Solenoid Valve (Two-Way Flow and One Pump_Two Pump) - Install
     Solenoid Valve (Two-Way Flow and One Pump_Two Pump) - Remove
     Sprocket - Remove and Install
     Stick Cylinder - Remove and Install
     Stick - Install
     Stick - Remove
     Support (Swing Boom) - Install
     Support (Swing Boom) - Remove
     Swing Boom Cylinder - Remove and Install
     Swing Boom - Install
     Swing Boom - Remove
     Swing Drive - Assemble
     Swing Drive - Disassemble
     Swing Drive - Install
     Swing Drive - Remove
     Swing Gear and Bearing - Remove and Install
     Swing Motor - Assemble
     Swing Motor - Disassemble
     Swing Motor - Install
     Swing Motor - Remove
     Swivel - Assemble
     Swivel - Disassemble
     Swivel - Install
     Swivel - Remove
     System Pressure - Release
     Track Adjuster - Assemble
     Track Adjuster - Disassemble
     Track Carrier Roller - Remove and Install
     Track - Remove and Install
     Track Roller - Remove and Install
     Undercarriage Frame - Install
     Undercarriage Frame - Remove
     Window Wiper Motor - Remove and Install

EXCERPT:
Blade RAISE
During a BLADE RAISE operation, the oil delivery from main pump (20) flows through line (19) to parallel feeder passage (5) in main control valve (2). Oil flows to blade control valve (12) .
Pilot pump (21) supplies oil to pilot control valve (16) through line (15). When the joystick for the blade is moved to the full BLADE RAISE position, the pilot oil flows from pilot control valve (16) through pilot line (13). The pilot oil flows to blade control valve (12) .
The pilot oil flow shifts blade control valve (12) for BLADE RAISE operation. The oil delivery from the main pump in parallel feeder passage (5) flows through passage (8) through blade control valve (12). The oil delivery from the main pump then flows through line (6) to the head end of blade cylinder (1) .
Return oil from the rod end of blade cylinder (1) flows through line (11) to blade control valve (12). The oil then flows through passage (9) and through return line (17) and line (18) to the hydraulic tank (23) .
Blade FLOAT
In the FLOAT position, no pump oil is supplied to the blade cylinder. No hydraulic control is used on the blade cylinder. The mass (size and weight) of the blade causes the blade to stay on the ground. The FLOAT position is suitable for levelling work on a soft surface.
When the blade control lever is moved forward into the detent position, the blade is placed in the FLOAT position. Blade control valve (12) shifts for the FLOAT operation. This allows oil to flow from the rod end of the cylinder and the head end of the cylinder through blade control valve (12).
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