Volvo EC25 Compact Excavator Repair Service Manual

Table of Content EC25 Service Information

• GENERAL
  • DESCRIPTION, COMPLETE MACHINE
    • General
      • Position of components
  • TABLES, FOR DESIGNING
    • • Load capacity tables
      • Warning sign – Open engine hood only with engine stopped
      • Warning sign – Safety distance from the movement area
      • Warning sign – Safety distance from the work area
  • SPECIFICATIONS
    • • Fuels Lubricants and filling capacities (litres)
      • Strength class 8.8 Metric coarse and fine threads
      • Strength class 10.9 Metric coarse and fine threads
      • UNC-threads, coarse pitch
      • Volvo standard tightening torques

• STANDARD PARTS, SERVICE
  • LUBRICANT; FUEL; OTHER FLUID
    • • Recommended lubricants
  • SERVICE
    • Maintenance
      • Condition test
        • Creeping of hydraulic cylinders
        • Measuring conditions
        • Measuring the play of the slewing bearing
        • Performance when travelling straight on
        • Track travel speed
      • Maintenance instructions
    • Emergency measures
      • Jump starting
        • Starting the engine with jump wires

• ENGINE WITH MOUNTING AND EQUIPMENT
  • • General, engine installation and its function
      • Installing the engine
      • Performance characteristics (measuring valuesł forł oneł hour with fan)
  • ENGINE
    • Cylinder head
      • Checking the compression pressure
    • Valve mechanism
      • Adjusting the valves
  • LUBRICATING SYSTEM
    • General, common info about 221 – 224
      • Lubrication system, description
      • Lubrication system, specification
    • Oil filter; filter housing
      • Removing and installing the pressure relief valve
      • Removing the oil filter
  • FUEL SYSTEM
    • General (common info about 233 – 238)
      • Bleeding the fuel system
      • Checking and adjusting the injection nozzles
      • Schematic, fuel system
    • Fuel pump; filter; strainer
      • Fuel feed pump
        • Adjusting the fuel injection timing
      • Filter; strainer
        • Changing the fuel filter
  • COOLING SYSTEM
    • General, common info about 261 – 269
    • Coolant pump; thermostat
      • Coolant pump
        • Removing and installing the coolant pump
      • Thermostat
        • Removing and installing the thermostat housing

• ELEC. SYSTEM; WARNING SYSTEM; INFORMATION SYSTEM; INSTRUMENTS
  • • Comprehensive info, electrical system
      • Electrical system, description
      • Electrical system, trouble shooting
      • 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
      • Tests before disassembly
    • Alternator inclusive drive
      • Dismantling and assembling the generator
      • Removing and installing the generator
    • Charging; converter
      • Checking the voltage regulation
  • STARTING SYSTEM
    • General, common info about 331 – 334
    • Starter motor inclusive solenoid
      • Starter motor
        • Assembling the starter
        • Dismantling the starter
        • Removing and installing the starter
      • Starter relay
        • Installation of the solenoid
        • Key-operated engine shut down system with EDD-solenoid
    • Electric air pre-heater, excluding element
      • Characteristics of the glow plug system
      • Installing the glow plug
  • LIGHTING
    • Lighting, extra, including working lighting
      • Working lighting
        • Working headlights and main headlights, specification
        • Working headlights and main headlights, description

• POWER TRANSMISSION
  • • General, common info about 410 – 436
      • General notes to be observed when working on power transmission assemblies
  • GEARBOX,
    • 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)
        • Design of travel motor
      • Miscellaneous
        • The loaded motor does not run with normal speed
    • Centre passage; lines
      • Centre passage
  • MISCELLANEOUS
    • Swing system upper part
      • Swing brake; swing holding brake; swing lock
        • Applying the brake

• BRAKE
  • • Comprehensive info about brakes

• STEERING
  • • Comprehensive info, steering
      • Steering system, description

• FRAME; SPRINGS; DAMPING; AXLE SUSPENSION; WHEEL/TRACK UNIT
  • • Comprehensive info about frame and track unit/wheels
      • Frame and crawler unit
  • FRAME
    • 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
      • Sprocket
        • Removing and installing the track drive
      • Steel track
        • Adjusting the track sagging
        • Removing and installing the rubber track
        • Removing and installing the track
      • Top rollers; skid rails
        • Removing and installing the track supporting idler
      • Bottom rollers
        • Removing and installing the track roller

• MACHINERY HOUSE; CAB; EXTERIOR TRIM PARTS ANYWHERE
  • • Comprehensive info, machinery house and cab
      • Removing and installing the cabin

• 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
    • Tank; line; oil cooling; filter; breather; filling pump
      • Tank
        • Changing the hydraulic oil
        • Checking the hydraulic oil level
      • Oil cooling system
        • Cleaning the oil cooler
      • Filters
        • Changing the hydraulic oil filter
    • Working hydraulics
      • Directional valve; control valve
        • Assignment of elements
        • Hydraulic circuit for slewing gear and offset
        • Hydraulic circuit of travel motors
        • Return flow, hydraulic accessories circuit
      • Pressure limiting valve (relief valves)
        • Checking and adjusting the pressure relief valves
        • Pressure relief valve P1 Test and adjustment procedure
        • Pressure relief valve P2 Test and adjustment procedure
        • Pressure relief valve P3
      • Hydraulic lock; line rupture valve
        • Hose rupture valve on boom cylinder, leak test
        • Hose rupture valve on boom cylinder
        • Hose rupture valve on boom cylinder Test and adjustment procedure
        • Hose rupture valve on dipper, leak test
        • Hose rupture valve on dipper
        • Secondary valves Test and adjustment procedure
      • Electric valve, in working hydraulics
        • Balancing valve (offset cylinder)
        • Solenoid valve for hydraulic working unit
      • Block for valve assembly
        • Control valve block for slewing gear Test and adjustment
        • Dismantling the valve block
        • Removing the valve block
        • Tests and adjustments of the power control
        • Valve block for slewing gear
    • Servo hydraulic system
      • Solenoid valve, on/off function
        • Hydraulic safety solenoid valve
      • Checking and adjusting the pressure reducer
      • Pressure regulator (hydraulic control elements)