Overview
The Volvo EC25 Compact Excavator Service Repair Manual brings the machine’s service topics together in a structured workshop reference. Its service groups address braking equipment, steering components, working and servo hydraulics, and electrical and instrument systems.
The contents also identify fuel injection timing references, engine compression checks, hydraulic tanks, filters and oil-cooling equipment, travel-motor components, and track rollers.
Table of Contents
Volvo EC25 Manual
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01. General
- Description, Complete Machine — Position of components
- Tables, for Designing — Load capacity tables
- Tables, for Designing — Warning sign – Open engine hood only with engine stopped
- Tables, for Designing — Warning sign – Safety distance from the movement area
- Tables, for Designing — Warning sign – Safety distance from the work area
- Specifications — Fuels Lubricants and filling capacities (litres)
- Specifications — Strength class 8.8 Metric coarse and fine threads
- Specifications — Strength class 10.9 Metric coarse and fine threads
- Specifications — UNC-threads, coarse pitch
- Specifications — Volvo standard tightening torques
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02. Standard Parts, Service
- Lubricant; Fuel; Other Fluid — Recommended lubricants
- Service — Maintenance — Condition test — Creeping of hydraulic cylinders
- Service — Maintenance — Condition test — Measuring conditions
- Service — Maintenance — Condition test — Measuring the play of the slewing bearing
- Service — Maintenance — Condition test — Performance when travelling straight on
- Service — Maintenance — Condition test — Track travel speed
- Service — Maintenance instructions
- Service — Emergency measures — Jump starting — Starting the engine with jump wires
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03. Engine with Mounting and Equipment
- General, engine installation and its function — Installing the engine
- General, engine installation and its function — Performance characteristics (measuring values for one hour with fan)
- Engine — Cylinder head — Checking the compression pressure
- Engine — Valve mechanism — Adjusting the valves
- Lubricating System — General, common info about 221 – 224 — Lubrication system, description
- Lubricating System — General, common info about 221 – 224 — Lubrication system, specification
- Lubricating System — Oil filter; filter housing — Removing and installing the pressure relief valve
- Lubricating System — Oil filter; filter housing — Removing the oil filter
- Fuel System — General (common info about 233 – 238) — Bleeding the fuel system
- Fuel System — General (common info about 233 – 238) — Checking and adjusting the injection nozzles
- Fuel System — General (common info about 233 – 238) — Schematic, fuel system
- Fuel System — Fuel pump; filter; strainer — Fuel feed pump — Adjusting the fuel injection timing
- Fuel System — Fuel pump; filter; strainer — Filter; strainer — Changing the fuel filter
- Cooling System — General, common info about 261 – 269
- Cooling System — Coolant pump; thermostat — Coolant pump — Removing and installing the coolant pump
- Cooling System — Coolant pump; thermostat — Thermostat — Removing and installing the thermostat housing
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04. Elec. System; Warning System; Information System; Instruments
- Comprehensive info, electrical system — Electrical system, description
- Comprehensive info, electrical system — Electrical system, trouble shooting
- Comprehensive info, electrical system — Precautions when handling plug connectors
- Battery; Energy Storage System; Mounting Parts — General, common info about 311 – 313
- Alternator; Charging; Electric Motor; Electric Drives — General, common info about 321 – 322 — Checking the performance characteristics
- Alternator; Charging; Electric Motor; Electric Drives — General, common info about 321 – 322 — Tests before disassembly
- Alternator; Charging; Electric Motor; Electric Drives — Alternator inclusive drive — Dismantling and assembling the generator
- Alternator; Charging; Electric Motor; Electric Drives — Alternator inclusive drive — Removing and installing the generator
- Alternator; Charging; Electric Motor; Electric Drives — Charging; converter — Checking the voltage regulation
- Starting System — General, common info about 331 – 334
- Starting System — Starter motor inclusive solenoid — Starter motor — Assembling the starter
- Starting System — Starter motor inclusive solenoid — Starter motor — Dismantling the starter
- Starting System — Starter motor inclusive solenoid — Starter motor — Removing and installing the starter
- Starting System — Starter motor inclusive solenoid — Starter relay — Installation of the solenoid
- Starting System — Starter motor inclusive solenoid — Starter relay — Key-operated engine shut down system with EDD-solenoid
- Starting System — Electric air pre-heater, excluding element — Characteristics of the glow plug system
- Starting System — Electric air pre-heater, excluding element — Installing the glow plug
- Lighting, extra, including working lighting — Working lighting — Working headlights and main headlights, specification
- Lighting, extra, including working lighting — Working lighting — Working headlights and main headlights, description
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05. Power Transmission
- General, common info about 410 – 436 — General notes to be observed when working on power transmission assemblies
- Gearbox — Track gearbox, crawler machine — Removing and installing the travel gear
- Hydrostatic Drive — Hydraulic motor incl. operating system. — Hydraulic motor 1, traveling — Brake valve (counter balance valve)
- Hydrostatic Drive — Hydraulic motor incl. operating system. — Hydraulic motor 1, traveling — Design of travel motor
- Hydrostatic Drive — Hydraulic motor incl. operating system. — Miscellaneous — The loaded motor does not run with normal speed
- Hydrostatic Drive — Centre passage; lines — Centre passage
- Miscellaneous — Swing system upper part — Swing brake; swing holding brake; swing lock — Applying the brake
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06. Brake
- Comprehensive info about brakes
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07. Steering
- Comprehensive info, steering — Steering system, description
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08. Frame; Springs; Damping; Axle Suspension; Wheel/track Unit
- Comprehensive info about frame and track unit/wheels — Frame and crawler unit
- Frame, excavator — Revolving frame — Removing and installing the superstructure
- Wheels; Tracks; Tyre; Hub; Drum — Crawler unit — Front idler, incl. fork — Removing and installing the guide sprocket
- Wheels; Tracks; Tyre; Hub; Drum — Crawler unit — Sprocket — Removing and installing the track drive
- Wheels; Tracks; Tyre; Hub; Drum — Crawler unit — Steel track — Adjusting the track sagging
- Wheels; Tracks; Tyre; Hub; Drum — Crawler unit — Steel track — Removing and installing the rubber track
- Wheels; Tracks; Tyre; Hub; Drum — Crawler unit — Steel track — Removing and installing the track
- Wheels; Tracks; Tyre; Hub; Drum — Crawler unit — Top rollers; skid rails — Removing and installing the track supporting idler
- Wheels; Tracks; Tyre; Hub; Drum — Crawler unit — Bottom rollers — Removing and installing the track roller
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09. Machinery House; Cab; Exterior Trim Parts Anywhere
- Comprehensive info, machinery house and cab — Removing and installing the cabin
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10. Hydraulic System; Digging/ Handling/ Grading Equipm.; Misc. Equip.
- Adjusting the pressure and checking for leaks
- General notes to be observe when working on the hydraulic system
- Test and adjustment mark for EC 25
- Working Hydraulics; Servo Hydraulics — General, common info about 911 – 917
- Working Hydraulics; Servo Hydraulics — Tank; line; oil cooling; filter; breather; filling pump — Tank — Changing the hydraulic oil
- Working Hydraulics; Servo Hydraulics — Tank; line; oil cooling; filter; breather; filling pump — Tank — Checking the hydraulic oil level
- Working Hydraulics; Servo Hydraulics — Tank; line; oil cooling; filter; breather; filling pump — Oil cooling system — Cleaning the oil cooler
- Working Hydraulics; Servo Hydraulics — Tank; line; oil cooling; filter; breather; filling pump — Filters — Changing the hydraulic oil filter
- Working Hydraulics; Servo Hydraulics — Working hydraulics — Directional valve; control valve — Assignment of elements
- Working Hydraulics; Servo Hydraulics — Working hydraulics — Directional valve; control valve — Hydraulic circuit for slewing gear and offset
- Working Hydraulics; Servo Hydraulics — Working hydraulics — Directional valve; control valve — Hydraulic circuit of travel motors
- Working Hydraulics; Servo Hydraulics — Working hydraulics — Directional valve; control valve — Return flow, hydraulic accessories circuit
- Working Hydraulics; Servo Hydraulics — Working hydraulics — Pressure limiting valve (relief valves) — Checking and adjusting the pressure relief valves
- Working Hydraulics; Servo Hydraulics — Working hydraulics — Pressure limiting valve (relief valves) — Pressure relief valve P1 Test and adjustment procedure
- Working Hydraulics; Servo Hydraulics — Working hydraulics — Pressure limiting valve (relief valves) — Pressure relief valve P2 Test and adjustment procedure
- Working Hydraulics; Servo Hydraulics — Working hydraulics — Pressure limiting valve (relief valves) — Pressure relief valve P3
- Working Hydraulics; Servo Hydraulics — Working hydraulics — Hydraulic lock; line rupture valve — Hose rupture valve on boom cylinder, leak test
- Working Hydraulics; Servo Hydraulics — Working hydraulics — Hydraulic lock; line rupture valve — Hose rupture valve on boom cylinder
- Working Hydraulics; Servo Hydraulics — Working hydraulics — Hydraulic lock; line rupture valve — Hose rupture valve on boom cylinder Test and adjustment procedure
- Working Hydraulics; Servo Hydraulics — Working hydraulics — Hydraulic lock; line rupture valve — Hose rupture valve on dipper, leak test
- Working Hydraulics; Servo Hydraulics — Working hydraulics — Hydraulic lock; line rupture valve — Hose rupture valve on dipper
- Working Hydraulics; Servo Hydraulics — Working hydraulics — Hydraulic lock; line rupture valve — Secondary valves Test and adjustment procedure
- Working Hydraulics; Servo Hydraulics — Working hydraulics — Electric valve, in working hydraulics — Balancing valve (offset cylinder)
- Working Hydraulics; Servo Hydraulics — Working hydraulics — Electric valve, in working hydraulics — Solenoid valve for hydraulic working unit
- Working Hydraulics; Servo Hydraulics — Working hydraulics — Block for valve assembly — Control valve block for slewing gear Test and adjustment
- Working Hydraulics; Servo Hydraulics — Working hydraulics — Block for valve assembly — Dismantling the valve block
- Working Hydraulics; Servo Hydraulics — Working hydraulics — Block for valve assembly — Removing the valve block
- Working Hydraulics; Servo Hydraulics — Working hydraulics — Block for valve assembly — Tests and adjustments of the power control
- Working Hydraulics; Servo Hydraulics — Working hydraulics — Block for valve assembly — Valve block for slewing gear
- Working Hydraulics; Servo Hydraulics — Servo hydraulic system — Solenoid valve, on/off function — Hydraulic safety solenoid valve
- Working Hydraulics; Servo Hydraulics — Servo hydraulic system — Checking and adjusting the pressure reducer
- Working Hydraulics; Servo Hydraulics — Servo hydraulic system — Pressure regulator (hydraulic control elements)
Removing and installing the travel gear, Travel Motor and Swing Brake
The associated entries are “Removing and installing the travel gear” and “Design of travel motor”.
A travel-motor entry is not interchangeable with the swing-motor or swing-brake entries; retain that distinction when choosing the relevant information.
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