Volvo EC20C Compact Excavators Service Manual

Volvo EC20C Compact Excavator Service Manual

A complete technical reference for field maintenance and factory-grade servicing of the EC20C compact excavator. Developed for professional use, this 856-page manual includes component disassembly, troubleshooting logic, pressure calibration routines, and inspection tolerances for diesel engines, hydraulic circuits, electrical systems, and undercarriage assemblies.

Model Covers:

Volvo EC20C – Compact Excavator with diesel powertrain and full hydraulic functionality

File Format: PDF

Size: 50.51 MB

No. of pages: 856

Language: English

Delivery Method: Instant Download - Secure PDF access after purchase

📑 Table of Contents Overview:

Engine Servicing & Fuel System

• Valve and camshaft diagnostics, injection pump timing, crankshaft removal, cylinder head reinstallation
• Injector testing, spray pattern analysis, fuel pressure adjustment and sediment handling
• Cooling and lubrication systems with component torque values and flow diagrams

Hydraulic System Tuning

• 14 hydraulic circuit diagrams: boom, dipper, bucket, swing, offset and dozer blade included
• Relief valve tuning (P1-P3), LS-pressure testing, servo pressure measurement and accumulator testing
• Disassembly and reassembly of main control valve, flushing valve, anti-cavitation systems

Electrical System & Diagnostic Tools

• Wiring diagrams (9 included), resistance and voltage test routines, ECU activation procedures
• Starter, alternator, glow plug system, relay mapping and connector testing protocols
• Component positioning: sensors, PWM valves, fuse boxes, A-ECU, H-ECU and I-ECU

Maintenance Schedules & Control Measurements

• Full cycle servicing: daily to 3000 hours, including lubrication, belt tensioning, filter changes
• Cylinder creep rate, travel straight-line deviation, swing overtravel and bearing play values
• Detailed torque specifications, track motor gearbox oil levels, and mechanical test points

Undercarriage, Frame & Cab Modules

• Cab lift, platform mounting, seatbelt replacement, rear panel removal, shock absorption check
• Rubber track replacement, sprocket assembly, idler and bottom roller servicing
• Slew motor service with gear reduction, swing motor rebuild and swivel joint inspection

This Volvo EC20C Compact Excavator Manual is a comprehensive engineering-grade reference for workshop-level diagnostics, repair procedures, and system calibration.