Volvo EC25 Compact Excavator Service Manual

Volvo EC25 Compact Excavator Technical Service Manual

Comprehensive maintenance and diagnostics guide for the EC25 series, designed for precision servicing of hydraulic, electrical, engine and undercarriage systems. Developed with service engineers in mind, this manual details teardown instructions, test protocols, and system-specific schematics aligned with the EC25’s Mitsubishi S3L/S3L2 engine platform.

Model Covers:

Volvo EC25 – Equipped with Mitsubishi S3L/S3L2 diesel engine

File Format: PDF

Size: 24.41 MB

No. of pages: 277

Language: English

Delivery Method: Instant Download - Direct PDF access after purchase

📑 Table of Contents Overview:

Engine Servicing - Mitsubishi S3L/S3L2

• Valve timing diagram, rocker arm clearance specs, compression test values with ST332270 adapter
• Step-by-step disassembly of fuel pump, injector nozzle calibration using injection tester
• Lubrication system circuit diagram, oil pressure testing (dual procedure), thermostat removal and reinstall
• Idle RPM settings: 900 ±100 (low), 2400 ±20 (high), with mechanical tachometer adjustment method

Hydraulic System - Control, Calibration & Diagrams

• Hydraulic block breakdown: swing, boom, dipper, blade, and auxiliary lines, all mapped and indexed
• Relief valves P1–P3: test procedure, working pressure settings, permissible ranges and measurement technique
• Hose rupture valve inspection (boom/dipper) with 5-min creep measurements in mm under fixed load
• Diagrams included: travel motor loop, swing gear logic, offset cylinder balance circuit

Undercarriage & Transmission Assembly

• Track sag adjustment procedure by soil type and slack range, both for steel and rubber crawlers
• Track motor disassembly using sling and custom tools, gear wear measurements in mm tolerance table
• Travel drive installation sequence, seal checks, torque settings and hydraulic line reintegration steps

Electrical Circuitry & Component Testing

• Starter circuit breakdown, including magnetic switch terminals, brush tension tests, pinion play specs
• Alternator disassembly steps, diode check on rectifier board, field coil ground resistance validation
• Wiring diagram (engine and control side), fuse map, voltage drop across preheating relay and glow plugs
• Glow plug timing vs. temperature behavior, solenoid actuation delay measurements and troubleshooting paths

Structural Maintenance & Calibration Procedures

• Cab lift and reattachment procedures, live ring alignment, and platform bolt torque specification
• Superstructure slewing bearing play inspection at position 1 and 2, using mm gap gauges (standard vs limit)
• Dozer blade cylinder speed tests, measurement in seconds, and wear tolerance against movement specs

This Volvo EC25 Technical Manual is engineered for hands-on service use. It consolidates factory procedures, test metrics, and teardown sequences to support accurate troubleshooting, tuning, and component reassembly for all primary systems on the EC25 platform.