Download Link-Belt Excavator 800X2 Service Hydraulic And Electrical Schematic (English)

Access the complete technical reference for the Link-Belt Excavator 800X2 with comprehensive service, hydraulic, and electrical schematics. Designed for professional heavy equipment technicians and field mechanics, this detailed documentation provides accurate wiring diagrams, hydraulic circuit layouts, component pinouts, and troubleshooting procedures. Ensure safe, efficient maintenance, minimize costly downtime, and accurately diagnose complex electrical and fluid system faults on your Link-Belt 800X2 heavy excavator using these precise factory-grade service schematics.

MODEL COVERED :
Link-Belt 800X2 Excavator

CONTENTS INCLUDED :
Main Body Section
Specifications
Overall
1. Main Data
2. Performance
3. Main Unit Dimensions
4. Engine
5. Cooling System
6. Upper Side Work System
7. Operating Device.
8. Swing Units
9. Travel Lower Body
Hydraulic Equipment
1. Hydraulic Device
2. Control Valve, Cylinder
Capacities, Filters
1. Coolant And Oil Capacities
2. Hydraulic Oil Filters
3. Fuel Filter
Lifting Capacity
Precautions For Lifting Loads With The Hydraulic Excavator.
Lifting Capacities (800×2)
1. Standard Arm 12.01 Ft (4 M), 750 Grouser Shoe
2. Long Arm 14.56 Ft (4 M), 750 Grouser Shoe.
3. Super Long Arm 18.45 Ft (6 M), 750 Grouser Shoe
Lifting Capacities (800×2 Mass)
1. Short Arm 9.76 Ft (3 M), 750 Grouser Shoe
Overall View
Overall View (Standard Boom).
1. Standard Arm 3.9 Yd (3.66 M).
2. Long Arm 4.9 Yd (4.44 M)
3. Super Long Arm 6.1 Yd (5.62 M).
Overall View (Mass Excavator)
1. Short Arm 3.3 Yd (2.98 M).
Work Range Diagram
Work Range Diagram (Standard Boom)
1. Standard Arm 4 Yd (3.66 M)
2. Long Arm 4.9 Yd (4.44 M)
3. Super Long Arm 6 Yd (5.62 M).
Work Range Diagram (Mass Excavator).
1. Short Arm 3 Yd (2.98 M).
Summary Section
Main Equipment Table
Lower Component
1. Travel Unit
2. Take-Up Roller
3. Upper Roller
4. Lower Roller
5. Recoil Spring
6. Shoe
Upper Component
1. Swing Unit
Engine-Related
1. Engine
2. Muffler
3. Air Cleaner (Double Element).
4. Radiator.
Hydraulic Device
1. Hydraulic Pump
2. Pump P-Q Diagram
Control-Related.
1. Control Valve
2. Solenoid Valve (5 Stack)
3. Remote Control Valve
4. Remote Control Valve Characteristic Diagram
5. Cushion Valve (Heat Circuit, With Shuttle Valve)
6. Selector Valve
7. Center Joint
Backhoe Attachment
1. Cylinder
2. Attachments
Equipment Layout Diagram
Main Equipment Layout
Consumable Part Layout
Standard Machine Option List
List Of Optional Components
Hydraulics Section
Hydraulic Equipment Layout
Overall View
Pump Chamber Hydraulic Equipment Layout
Swing Body Center Section Hydraulic Equipment Layout
Housing Left Side Hydraulic Equipment Layout
Layout Of Hydraulic Equipment In Cab
Port Diagram
Pump
1. Hydraulic Pump (Standard Model).
Valves
1. Control Valve
2. 5 Stack Solenoid Valve
3. 2 Stack Solenoid Valve
4. Remote Control Valves (Upper, Travel)
5. Cushion Valve
6. Hbcv (Option For Export, Europe)
Manifolds
1. Manifold Under Cab.
2. Manifold (Accumulator Section).
3. Manifold
Motors.
1. Swing Motor
2. Travel Motor
3. Center Joint
Pilot Hose Connection Diagram
Pilot P And T Lines
Pilot Control Line
Pilot Control Line (2-Way Selector Valve)
Function List
Function Table
Explanation Of New Functions
1. Swing Relief Cut-Off Control
2. Option Line Flow Adjustment Control.
Explanation Of Hydraulic Circuit And Operations (Standard Model)
Travel Circuit
Travel Low-Speed Circuit
Travel High-Speed Circuit
Straight Travel Circuit
Swing Circuit.
Swing Relief Cut-Off Control Circuit
Swing Priority Circuit
Swing Brake Circuit
Swing Parking Circuit (Lever In Neutral)
Swing Parking Circuit (Brake Release)
Swing Parking Circuit (Machine Stop)
Boom Circuit
Boom-Up Circuit (Single Operation) (With / Without Hbcv)
Boom-Up Circuit (Compound Boom-Up + Bucket)
Boom-Up Circuit (Compound Boom-Up + Swing).
Boom-Down Regenerative Circuit (With / Without Hbcv)
Boom-Down Load Holding Valve Circuit.
Arm Circuit
Arm-Out Circuit (With / Without Hbcv)
Arm-In Forced Regenerative Circuit.
Arm-In Load Holding Valve Circuit
Bucket Circuit
Bucket-Open Circuit
Bucket Close
Negative Control Circuit
Negative Control Circuit
Horsepower Boost Circuits
High Load Horsepower Boost Circuit
Other Circuits
Cushion Circuit (Arm-Out Operation).
Cushion Circuit (Arm-Out Operation Stopped).
Cushion Circuit (Arm-Out → Arm-In Operation).
Heat Circuit (Lever In Neutral)
Auto Pressure Boost Circuit (Bucket Close)
Explanation Of Hydraulic Circuit And Operations (Option)
Option Circuits
Breaker Circuit (Independent Operation).
Double-Acting Circuit (Hydraulic Fork)
Multi-Purpose Circuit (Breaker Circuits)
Multi-Purpose Circuit (2 Pumps Flow Circuit)
2nd Option Circuit (Hydraulic Rotation Fork)
Main Equipment Structure And Operation Explanation
Pump
1. Hydraulic Pump
2. Regulator
3. Gear Pump
Motor
1. Travel Motor
2. Swing Motor
Valve
1. Control Valve
2. 5 Stack Solenoid Valve Operation Explanation
3. Upper Pilot Valve (Remote Control Valve)
4. Travel Pilot Valve (Remote Control Valve).
5. Cushion Valve.
Hydraulic Drive Fan Motor
1. External Shape Diagram
2. Internal Structure Diagram
3. Operation Principles
Electrics Section
Explanation Of New Functions
Work Mode Select Switch.
The Throttle Volume And Work Mode Select Switch Are Linked!!
Computer Connection Method
Monitor Changes
Pilot Pressure Switch Changed To Pressure Sensor
Pump Electromagnetization Proportional Valve
1. Horsepower Control Proportional Valve
2. P1 Flow Control Proportional Valve
System Control For Energy Saving
1. Reduced Fuel Consumption Through Transient Load Reduction Control
2. Reduced Fuel Consumption Through Swing Relief Cut Control
Electrical Equipment Layout Diagram
Overall View
1. Main Unit Left Side Layout Diagram (Radiator Chamber)
2. Engine Section Layout Diagram
3. Main Unit Right Side Layout Diagram (Pump Chamber)
4. Main Unit Center Section Layout Diagram
5. Cab Layout Diagram 1
6. Layout Around Operator’s Seat
Stand Alone Parts Diagram
Main Equipment Structural Diagrams
Connection Connector Pin Layout
1. Computer A
2. Monitor
Electrical Circuit Diagram
Overall View
1. Sequence Circuit Diagram
Block Diagram
1. Computer A
2. Ecm
3. Monitor Display.
4. Air Conditioner
5. Lever Lock
6. Horn
7. Hydraulic Motor Fan
8. Mounting Counterweight
9. Working Light
10. Option.
11. Others.
12. Electrical Symbol List
Electrical Connector Wiring Diagram
Wire Harness
1. Main Frame Harness
Cab
1. Cab Main Harness
2. Cab Sub Harness.
3. In Cab.
4. Engine Harness
Console
1. Console Right Harness
2. Console Left Harness.
Electrical Parts And Wiring Assembly Diagram
Main Frame.
Cab
Explanation Of Functions And Operations
Explanation Of Electrical Functions.
Engine Speed Control
1. Throttle Control.
2. Idling Control (Auto / One-Touch).
3. Idling Start
4. Auto Warm Up
Engine Start / Stop Control.
1. Engine Start / Stop Judgment
2. Power-Cut Delay
3. Engine Emergency Stop.
4. Neutral Start
Pump Control
1. Work Mode Control.
2. Pump Horsepower Boost Control.
3. Pump Horsepower Cut Control.
Swing
1. Swing Brake
2. Swing Free Swing.
3. Swing Relief Cut.
Travel
1. Travel Speed Switchover
2. Travel Alarm.
Valve Control
1. Lever Lock
2. Solenoid Sticking Prevention.
3. Pressure Boost Control
Monitor Control
1. Bar Graph (Coolant Temperature Gauge, Oil Temperature Gauge,
Fuel Gauge)
Accessories
1. Horn.
2. Working Light.
3. Wiper And Washer.
4. Room Lamp.
5. Radio Mute
Others
1. Anti-Theft
2. Battery Save Function
3. Alternator Power Generation Detection.
4. Overload Alarm (Option For Europe)
5. Control Of Hydraulic Driven Fan.
Options
1. Option Line Control
2. Option Line Control
3. Feed Pump Automatic Stop.
4. Return Filter Clogging Detected
5. Beacon
Service Support
Screen Operations.
1. Screen Shift.
Screen Display List
1. Chk (Status Display) Screen List.
2. Diag (Trouble Diagnosis) Screen.
3. Hr (Usage Log) Screen List
4. Cfg (Setting Change) Screen
5. Cal (Troubleshooting Support) Screen
6. Check The Monitor Switch (Self-Diagnosis Function).
7. Option Flow Setting
8. Anti-Theft Setting
9. Model Setting
10. Engine Information Screen
Screen Display Details.
1. Message Display List.
Abnormality Display.
1. Diagnostic Trouble Code Display.
2. Main Unit Diagnostic Trouble Code List.
3. Diagnostic Trouble Code (Monitor Display)
4. Sensor Trouble Operation Table
5. Epf (Engine Protection Feature)
Engine Section
Engine Summary
Main Data Table
Overall Appearance Diagram.
Sensor And Auxiliary Equipment Layout (Left)
Sensor And Auxiliary Equipment Layout (Rear)
Engine System Diagram
Fuel System Diagram
Detailed Parts Diagrams
1. Ecm (Engine Control Module)
2. Supply Pump/Pcv (Pressure Control Valve)
3. Common Rail/Flow Damper
4. Common Rail Pressure Sensor/Pressure Limiter
5. Injector
6. Engine Coolant Temperature Sensor
7. Engine Oil Pressure Sensor
8. Cam Position Sensor (G Sensor).
9. Crank Position Sensor (Ckp Sensor)
10. Atmospheric Pressure Sensor.
11. Suction Air Temperature Sensor
12. Boost Pressure Sensor
13. Boost Temperature Sensor
14. Egr Cooler
15. Lead Valve (Check Valve).
16. Egr Valve
Engine Control Summary
Explanation Of Engine Terms
Function Explanation Table
Explanation Of Engine Structure
Technology For Exhaust Gases
1. Common Rail System
2. Multi-Stage Fuel Injection (Multiple Injection)
3. Inter Cooler.
4. Egr (Exhaust Gas Recirculation)
Explanation Of Engine Operation
Fuel Unit
1. Common Rail System Summary
2. Change Points For Injection Method (Governor, Common Rail)
3. Explanation Of Injector Operation
4. Explanation Of Supply Pump Operation
5. Supply Pump Disassembly Diagram
6. Explanation Of Flow Damper Operation
7. Pressure Limiter
8. Cautions For Maintenance
Explanation Of Engine Control
1. Fuel Injection Quantity Correction
2. Starting Q Correction.
3. Preheat Control (Qos Quick On Start)
4. Atmospheric Pressure Correction (High Altitude Correction)
5. Control For Overheating
6. Control For Boost Temperature Rise
7. Control For Engine Oil Pressure Drop.
8. Start Control (Coolant Temperature Monitoring).
9. Long Cranking Control
10. Starting Control For Reduced Number Of Cylinders
11. Normal Stop (Key Switch Off Operation)
12. Engine Start / Stop Judgment
Engine Maintenance Standards
Engine Information Screen
1. Purpose.
2. How To Go To This Screen
3. Engine Start Restriction
4. Screen
Monitor Operating Method.
1. View Mode.
2. Edit Mode
Engine Information (Q Resistance, Qr Code, Engine Serial Number)
Copying Method.
Rewriting Injector Qr Codes
When Replacing Computer A At The Same Time
Engine Information Acquisition Timing
Redoing Engine Information Acquisition
Abnormality Display.
Engine Equipment Table
Exhaust Gas 3rd Accessory Electrical Parts Compatibility (Isuzu Part Number)
Exhaust Gas Regulations
Features Of Materials Subject To Exhaust Gas Regulation
Exhaust Gas Regulation Values
Cautions For Fuel Used
Engine Fuel And Maintenance Of Fuel Filters
1. Fuel To Be Applied.
2. Maintenance Of Fuel Filters
Air Conditioner Section
Layout Diagram
Air Conditioner Overall Diagram
1. Frame
2. Cab
Equipment Layout Diagram
Circuit Diagram
Air Conditioner Circuit Diagram
Air Conditioner Circuit Diagram
Explanation Of Functions
Explanation Of Control
1. Air Mix Motor Actuator Control
2. Blow Mode Motor Actuator Control
3. Refresh / Recirculate Switch Motor Actuator Control
4. Blower Amp Control.
5. Compressor Clutch Control
6. Coolmax Control And Hotmax Control
7. Trouble Detection And Control After Trouble Detected.
8. Monitor Mode
9. Door Switch Control
10. Inside Air Filter Clogging Detection Control
Actuator Inspection
Air Mix Motor Actuator Inspection
Refresh / Recirculate Motor Actuator Inspection
Mode Motor Actuator Inspection
Self-Diagnosis Function With Panel Display
Abnormality Display And Self-Check Procedures.
1. Abnormality Display Position
2. Explanation Of Abnormality Display.
3. Explanation Of Monitor Mode.
Part Function And Ok/Ng Judgment
Control Panel And Control Unit
Blower Amp
Relay
Air Mix Actuator
Refresh / Recirculate Actuator.
Blow Mode Actuator.
Evaporator Sensor
Dual Pressure Switch
Solar Radiation Sensor.
Maintenance Section
Pressure Measurement And Adjustment Procedures
Procedures For Pressure Measurement From The Monitor Display.
1. Pressure Measurement Method
2. Operating Method
Procedures For Measuring Hydraulic Oil Temperature From The Monitor Display.
1. Hydraulic Oil Temperature Measurement Method.
2. Operating Method
Procedures For Pressure Measurement By Installing Pressure Gauge
1. Preparations
2. Items To Prepare
Pressure Measuring Ports
Pressure Adjustment Location.
1. Location Of Relief Valves
Pressure Measurement Preparations
Pressure Measurement And Adjustment Procedures
1. Main Pressure Measurement
2. Pilot Pressure Measurement
3. Negative Control Pressure Measurement
Pressure Adjustment
1. Main Pressure Adjustment
2. Pilot Pressure Adjustment
Hydraulic Pump Flow Measurement Procedure
Preparations
1. Items To Prepare
Work Preparations.
Flow Measurement
Drain Volume Measurement Procedure
Preparations
Travel Motor Drain Volume Measurement
Swing Motor Drain Volume Measurement
Air Bleed Procedure
Hydraulic Pump
Travel Motor
Swing Motor.
Hbcv.
1. Boom Cylinder Hbcv
2. Arm Cylinder Hbcv.
Procedures For Replacing Consumable Parts
Air Conditioner Belt And Fan Belt Replacement
1. Air Conditioner Belt Replacement
2. Fan Belt Replacement
Fuel Filter Replacement
1. Filter Replacement
2. Air Bleeding
Engine Oil Filter And Engine Oil Replacement
1. Engine Oil Replacement.
2. Engine Oil Filter Replacement
Radiator Coolant Replacement
Air Cleaner Cleaning And Replacement
Hydraulic Oil Filter Replacement
1. Return Filter Replacement
2. Suction Filter Replacement
3. Air Breather Element Replacement
4. Pilot Oil Filter Replacement
5. Hydraulic Oil Replacement.
Others.
1. Coolant Filling.
2. Washer Fluid Filling
Periodic Maintenance Procedures
Maintenance Every 250 Hours
1. Battery Inspection And Replacement
Maintenance After First 250 Hours For New Machine / Every 1000 Hours
From Then On
1. Swing Reduction Gear Oil Replacement
2. Gear Oil Filling
Replace The Flange Packing At The Bottom Of The Fuel Tank
Bolt Size And Torque Table
Bolt And Nut Tightening
Bolt And Nut Retightening [After 1st 50 Hours For New Machine]
[Every 250 Hours]
Retightening Torque Table
Data Section
Main Unit Weight
Major Component Weight (Standard Specifications).
Individual Part Weight.
Shoe Weight (One Side)
Arm Weight.
Bucket Weight.
Interchangeability
Interchangeability
1. Main Part Interchangeability Table (Model 5)
Attachment Installation Methods
Attachment Dimensions
Paint Colors
Paint Colors
Unit Conversion Ratio
Unit Conversion Ratio.
Assembly And Disassembly Section
Assembly
Overall Process
Major Machines • Tools • Equipment Table
Matters To Be Attended
Prior Preparation
Ensuring Assembly/Disassembly Work Place.
Major Layout.
Prior Preparation Procedure
Unloading Work
1. Unloading Work No. 1
2. Unloading 1 Procedure
3. Unloading Work No. 2
4. Procedure For Unloading Work No. 2.
5. Unloading Work No. 3
6. Procedure For Unloading Work No. 3.
Connection Of Lower Sideframes To Upper Swing Body
1. Assembling Work No. 1 (One Side)
2. Procedure For Mounting No. 1
3. Assembling Work No. 2 (Remaining One Sideframe)
4. Procedure For Mounting No. 2
Mounting Travel Motor Lines
1. Procedure For Mounting.
Mounting Counterweight
Procedure For Mounting.
Mounting Attachments.
1. Mounting Boom Cylinders
2. Mounting Boom And Connecting Cylinder Hose
3. Mounting Boom Cylinder Top Pin
4. Mounting Arm.
5. Connecting Bucket Cylinder Hose And Mounting Bucket
6. Mounting Bucket
Checking Work
Confirmation Of Movement After Assembling Work
1. Attended Items When Assembling Work Is Done.
2. Procedure For Confirmation Of Movement And The Items To Be Attended
After The Assembling Work Is Completed.
Disassembly
1. Bucket Removal.
2. Arm Removal
3. Boom Cylinder Removal
4. Boom Removal
5. Counterweight Removal.
6. Removal Of Travel Motor Piping And Their Small Accessories.
7. Separation Of Upper Body And Lower, And Loading
Attached Data
Stool Assembly Drawing (Bkwa4024-B01)
1. Stool (Upper) (Bkwa4025-B01).
2. Stool (Under) (Bkwa4026-B01).
Lower Frame Assembly Drawing
Piping Cover Assembly Drawing.
Traction Motor Line Assembly Drawing.
Counterweight Assembly Drawing
Catwalk Assembly Drawing
House Assembly Drawing.
Attachment Assembly Drawing.

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