Volvo EC20B XT Compact Excavator Repair Manual

Table of Content EC20B XT Service Information

GENERAL
DESCRIPTION, COMPLETE MACHINE
General
Position of components
TABLES, FOR DESIGNING
Load capacity tables
Nominal lifting loads EC15B XR
Reach of the working attachment EC15B
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
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 TIME
STANDARD PARTS, SERVICE
LUBRICANT; FUEL; OTHER FLUID
Recommended lubricants
SERVICE
Maintenance
Condition test
Creeping of hydraulic cylinders
Deviation when travelling straight ahead
Measuring conditions
Measuring the play of the slewing bearing
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 values 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
Disassembling the fuel pump
Fuel injection timing
Filter; strainer
Changing the fuel filter
COOLING SYSTEM
General, common info about 261 – 269
Technical data
Radiator, mounting and connections included
Radiator; heat exchanger
Removing the radiator
Coolant pump; thermostat
Coolant pump
Removing the coolant pump
Thermostat
Removing the thermostat housing
ELEC. SYSTEM; WARNING SYSTEM; INFORMATION SYSTEM; INSTRUMENTS
Comprehensive info, electrical system
BATTERY; ENERGY STORAGE SYSTEM; MOUNTING PARTS
General, common info about 311 – 313
ALTERNATOR; CHARGING; ELECTRIC MOTOR; ELECTRIC DRIVES
General, common info about 321 – 322
Alternator inclusive drive
Charging; converter
STARTING SYSTEM
General, common info about 331 – 334
Starter motor inclusive solenoid
Starter relay
Electric air pre-heater, excluding element
LIGHTING
General, common info about 351 – 356
Lighting, extra, including working lighting
OTHER ELECTRICAL EQUIPMENT
General, common info about 361 – 367
Audible warning from horn; mounting
CABLE; FUSE; RELAY
Cable; battery disconnector
Electrical distribution box; fuse box; junction box
INSTRUMENT; SENSOR; WARNING AND INFORMATION SYSTEM
General, common info about 383 – 387
Sender, monitoring system
Warning/information unit, display unit
POWER TRANSMISSION
General, common info about 410 – 436
General notes to be observe when working on power transmission assemblies
HYDROSTATIC DRIVE
General, common info about 441 – 443
Hydraulic motor 1 Ţ€“ travel system
Mechanical transmission Ţ€“ track gearbox
Hydraulic motor incl. operating system.
Design of travel motor
Brake valve (counter balance valve)
Disassembling the travel motor
Dismantling the travel gear
Hydraulic motor Ţ€“ slewing of superstructure
Hydraulic motor 1, travel gear
Removing the gear motor
Centre passage; lines
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
Undercarriage (crawler machine)
Assembling the cylinder for adjustable track width
Removing the cylinder for adjustable track width
Revolving frame
Removing the superstructure
WHEELS; TRACKS; TYRE; HUB; DRUM
Crawler unit
Front idler, incl. fork
Removing the guide sprocket
Sprocket
Removing the track drive
Steel track
Adjusting the track sagging
Removing the crawler tracks
Top rollers; skid rails
Removing the sliding bar
Bottom rollers
Removing the track roller
MACHINERY HOUSE; CAB; EXTERIOR TRIM PARTS ANYWHERE
Comprehensive info, machinery house and cab
CAB, NAKED; CANOPY
Cabin (closed)
Roll over protection structure
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 values for EC15B
Test and adjustment values for EC20B
WORKING HYDRAULICS; SERVO HYDRAULICS
General, common info about 911 – 917
Hydraulic diagram EC15B XR
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
Removing the oil cooler
Filters
Changing the hydraulic oil filter
Working hydraulics
Directional valve; control valve
Assignment of elements
Hydraulic circuit for dozer blade and adjustable track width
Hydraulic circuit for slewing gear and offset
Hydraulic circuit for dozer blade
Return flow, hydraulic circuit for accessories EC15B
Return flow, hydraulic circuit for accessories EC20B
Pressure limiting valve (relief valves)
Checking and adjusting the pressure relief valve
Checking and adjusting the pilot pressure
Tests and adjustments of the pressure relief valves
Hydraulic lock; line rupture valve
Adjustment of secondary valves Test and adjustment procedure
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 arm cylinder, leakage test
Hose rupture valve on dipper cylinder
Electric valve, in working hydraulics
Balancing valve (offset cylinder)
Solenoid valve for hydraulic working unit
Block for valve assembly
Checking and adjusting the breaker (volumetric