Volvo EC55 Compact Excavator PDF Service Manual - Hydraulics, I-ECU, Track Motor

Volvo EC55 Compact Excavator PDF Service Manual.

Technical workshop manual for the Volvo EC55 Compact Excavator covering complete system diagnostics, hydraulic valve testing, track gear rebuild, electrical troubleshooting, and engine calibration. Ideal for in-depth servicing of systems like servo hydraulics, I-ECU instruments, swing motors, and undercarriage assemblies.

Model Covers:

Volvo EC55 – Compact Excavator equipped with I-ECU, servo hydraulics, and electronic injection system

File Format: PDF

Size: 28.84 MB

No. of pages: 489

Language: English

Delivery Method: Instant Download - Access your file immediately after purchase

📑 Table of Contents Overview:

Engine & Fuel System

• Compression test, cylinder head rebuild, valve clearance, fuel injection nozzle inspection
• Timing gear and camshaft setup, breather system check, fuel filler pump and filter service
• Lubrication circuit calibration, oil pressure switch diagnostics, air heater and preheat system

Electrical System & ECU Interfaces

• 20+ wiring diagrams with full sensor and fuse mapping, voltage drop and relay testing
• I-ECU instrument panel configuration, battery/load test, generator and starter motor inspection
• Safety start relay, preheating relay, glow plug system, horn, wipers and lighting system diagnostics

Hydraulic Testing & Circuit Schematics

• FR, LS, servo, and neutral valve pressure testing with diagnostic conditions and tools
• Valve block breakdown, hammer option plumbing, boom/arm/bucket circuit diagrams
• Hydraulic schematic diagrams: main, servo, return, and working lines included

Undercarriage & Gearboxes

• Track gearbox teardown and service, slew gearbox diagnostics, brake torque inspection
• Track motor disassembly, center passage rotation tests, travel speed and alignment control
• Top/bottom rollers, idlers, sprockets: wear specs, replacement and tensioning procedures

Cab Frame, Heating Unit & Interior Systems

• Cab component layout, seat and windshield procedures, instrument panel wiring
• Air conditioning system, expansion valve, evaporator, heater unit and airflow direction testing
• Shock absorber mount inspection, cab structure replacement and vibration isolation elements

Cylinders, Swing Motor & Attachments

• Bucket, boom, dipper, dozer blade cylinder teardown and leakage diagnosis
• Slew motor operation principles, troubleshooting, installation alignment, and seal kit replacement
• Counterweight installation/removal, optional attachment handling, tool references

This Volvo EC55 Compact Excavator Manual supports detailed inspection, repair, calibration, and overhaul of hydraulic, electronic, and mechanical systems on this versatile compact machine.