Description

Sumitomo SH80-3 Hydraulic Excavator Service Text & Wiring Diagrams

Sumitomo SH80-3 Hydraulic Excavator Index:

Major Equipment Specifications
Equipment Configuration..
Overall ..
Operator’s Cab
Lower Mechanism..
Assembly Diagrams(overall) ..
Travel Unit (with parking brake)..
Take-up Roller .
upper Roller,
Lower Roller (External roller) ,
Recoil Spring
Upper Mechanism….
Swing Unit ..
Engine and Related Areas.
Engine
Muffler .
Air Cleaner (double element).
Radiator. , .
Fuel Tank.
Hydraulic System
Hydraulic Pump
Sump Tank .
Rotating Joint,
Solenoid Valve.
Controls.
Remote Control Valve
Control Valve .
Backhoe Attachments .
Cylinder .
Attachments,

Hydraulics Section
Hydraulics
Hydraulic Pump:Operational Description………….
I. Configuration and Principle of Operation
2. Flow Control
Control Valve:Operation…….. .
1. Operation with All Spools in Neutral .
2. Independent Operation.
3. Combined Operations……..
4. Relief Valve…….
Swing Unit:Swing Motor.
Functional and Operational Description….
I.
2.
a.
4.
5-
Swash Plate Motor
Parking Brake (for models equipped with parking brak
Principle of Relief Valve Operation..
Makeup Valve….
Reduction Gear (2-stage planetary gear) …..
Swing Unit:Anti-reverse
1. Overview.
2. Operational Description .
Travel Unit: Travel Motor
1.
2.
3.
External Dimensional Drawing
Basic Structure and Drawings
Operational Description .

Hydraulic Circuits Section
Port Locations
Hydraulic pump..
Control Valve .
Pilot Hose Connection Diagrams .
Pilot P&T Lines. ..
Pilot Control Lines..
List of Functions .
List Of Functions
Control Valve Configuration Table . ,
Travel Circuits
High-Speed Travel Circuit…..
Low-Speed Travel Circuit
Straight-Travel Circuit (Boom-up and Travel-Forward)…… .
Swing Circuits
Swing Parking Circuit (Independent Operation of Swing)..
Swing Override Throttle Circuit
Bucket Circuits. .
Bucket-Opening Circuit.
Bucket-Closing Circut..
Arm Circuits
Arm-ln/Arm-Out 2-Speed Circuit..
Boom Circuits .
Boom-Up 2-Speed Circuit. .
Boom-Down Load Holding Valve Circuit..
Boom Swing Circuits. ….
Boom Swing Circuit.
Blade Circuits.
Blade Circuit
Backup Circuit
Breaker and Crusher Circuit (2-Speed Confluence Crusher Circuit)
Breaker and Crusher Circuit (Backup Line Holding Valve) ..
Breaker and Crusher Circuit (Breaker Circuit) .

Electric Circuits Section
Operational Description .
Monitor Display.
List of Functions
Engine Control…
1-1. Engine start-up control ….
1-2. Throttle control .
1-3. One-touch idling .
2. Monitor Output Control
2-1. 2-Speed travel .
2-2. Swing brake
2-3. Travel alarm .
2-4. Working light.
2-5. Windshield wiper / washer ,
2-6. Power cut delay .
3. Monitor Display Control , , , , ,
3-1. Overheat warning.
3-2. Engine oil pressure warning …. .
3-3. Low fuel waming..
3-4. Battery charge warning..
3-5.
Electric Circuit Diagrams
Electric Circuit Diagram i
Electric Circuit Diagram 2
Electric Circuit Diagram: Air Conditioner 1
Electric Circuit Diagram: Air Conditioner 2 .
Wiring Diagrams
Electrical Components and Wiring for Upper Frame ……
Electrical Components and Wiring for Cab, , ,