VOLVO L70H WHEEL LOADER SERVICE REPAIR MANUAL PDF – 951 PAGES

The Volvo L70H Wheel Loader Service Repair Manual provides detailed technical information for the inspection, diagnosis, maintenance, servicing, adjustment, and repair of the Volvo L70H wheel loader.

This comprehensive 951-page PDF manual, with information updated in 2020, covers major mechanical, electrical, electronic, and hydraulic systems, including the engine, fuel injection system, exhaust aftertreatment equipment, power transmission, braking system, steering, operator cab, and working hydraulics.

The documentation includes component removal and installation procedures, replacement instructions, hydraulic pressure testing, system adjustments, electronic control module servicing, calibration references, and Volvo Tech Tool diagnostic operations.

Particular attention is given to the AdBlue/DEF system, Diesel Particulate Filter (DPF), Exhaust Gas Recirculation (EGR), Selective Catalytic Reduction (SCR), high-pressure fuel system, Comfort Drive Control (CDC), and Boom Suspension System.

This manual is a practical technical reference for heavy equipment mechanics, construction machinery repair workshops, fleet maintenance technicians, and Volvo L70H wheel loader owners.

MANUAL DETAILS

• Manufacturer: Volvo Construction Equipment
• Equipment Model: L70H Wheel Loader
• Manual Type: Service Repair Manual
• File Format: PDF
• Number of Pages: 951
• Information Update: 2020
• Delivery: Digital Download

WHAT IS INCLUDED IN THIS SERVICE REPAIR MANUAL?

The manual is organized into ten numbered technical groups, covering general service information and the main operating systems of the Volvo L70H wheel loader.

1. GENERAL SERVICE INFORMATION

The introductory section contains references for specialized service tools and general workshop operations.

Included topics:

• Service tool user instructions
• Checking points and equipment references
• Infrared thermometer
• Additional work operation numbers
• General service-related technical information

2. STANDARD SERVICE PROCEDURES

This section covers selected routine servicing and inspection operations.

Included procedures:

• AdBlue/DEF pump unit filter replacement
• Hydraulic pressure checks
• Manual parking brake release

These procedures provide useful references for essential machine servicing operations.

3. ENGINE SERVICE AND REPAIR

The engine section contains extensive procedures for testing, removing, installing, replacing, and adjusting major engine components.

ENGINE MECHANICAL SERVICE

• Engine removal and installation
• Complete engine replacement
• Cylinder compression testing
• Engine valve adjustment
• Engine belt replacement
• Rear engine mounting replacement
• Valve cover removal and installation
• Turbocharger replacement
• Engine stall speed testing

ENGINE COOLING AND LUBRICATION

• Cooling system pressure testing
• Coolant pump replacement
• Coolant valve replacement
• Thermostat replacement
• Radiator and charge air cooler removal and installation
• Engine lubrication oil pressure testing
• Engine oil consumption checks
• Carbon dioxide checks in the cooling system

HIGH-PRESSURE FUEL INJECTION SYSTEM

• High-pressure fuel pump replacement
• Fuel rail replacement
• Fuel rail pressure sensor replacement
• Fuel Control Valve (FCV) replacement
• Pressure Relief Valve (PRV) replacement
• High-pressure fuel pipe replacement
• Fuel injector replacement
• Injector sleeve replacement
• Fuel feed pump pressure testing
• Fuel system bleeding
• Carbon dioxide checks in the fuel system

4. ADBLUE/DEF AND EXHAUST AFTERTREATMENT SYSTEM

The manual provides detailed servicing information for the Volvo L70H exhaust aftertreatment equipment.

ADBLUE/DEF SYSTEM

• AdBlue/DEF dosing injector replacement
• AdBlue/DEF hose replacement
• AdBlue/DEF mixing tube replacement
• AdBlue/DEF pump unit replacement
• AdBlue/DEF pump flushing
• AdBlue/DEF pump filter replacement
• AdBlue/DEF pump inlet nipple replacement
• AdBlue/DEF tank removal and replacement
• AdBlue/DEF tank cleaning
• AdBlue/DEF tank armature servicing
• AdBlue/DEF suction filter replacement
• AdBlue/DEF quality testing
• AdBlue/DEF crystallization checks
• AdBlue/DEF draining

DIESEL EXHAUST AFTERTREATMENT

• Diesel Oxidation Catalyst (DOC) replacement
• Diesel Particulate Filter (DPF) inspection and cleaning
• Exhaust Gas Recirculation (EGR) valve replacement
• EGR cooler replacement
• EGR reed valve replacement
• EGR venturi tube cleaning and replacement
• Selective Catalytic Reduction (SCR) dosing system inspection
• SCR muffler replacement
• Exhaust flexible pipe replacement
• Regeneration log checks

ENGINE AND AFTERTREATMENT ELECTRONICS

• Engine Control Module (ECM) replacement
• Aftertreatment Control Module (ACM) replacement
• Pre-programmed and non-programmed module replacement procedures

5. ELECTRICAL AND ELECTRONIC SYSTEM SERVICE

The electrical section contains procedures for checking, servicing, and replacing selected electrical components and electronic control units.

Included topics:

• Battery condition testing
• Battery replacement
• Starter motor replacement
• Starter lock replacement
• GPMECU1 replacement
• GPMECU2 replacement
• GPMECU3 replacement
• HMICU replacement
• W-ECU replacement
• Volvo Tech Tool service operations

The documentation includes replacement procedures for pre-programmed and non-programmed electronic control modules where specified.

6. POWER TRANSMISSION AND AXLE REPAIR

The power transmission section provides service procedures for the transmission, axles, differential components, and associated hydraulic controls.

TRANSMISSION SERVICE

• Transmission removal and installation
• Transmission function testing
• Transmission oil pressure testing
• Hydraulic transmission warm-up
• Transmission calibration error code references
• Gear selector solenoid replacement
• Lock-up valve replacement
• Transmission heat exchanger replacement
• Front output shaft seal replacement
• Rear output shaft seal replacement

AXLE AND DIFFERENTIAL SERVICE

• Axle removal and installation
• Axle suspension bush replacement
• Axle suspension seal replacement
• Differential lock adjustment
• Differential lock function testing
• Hub reduction removal and installation
• Hub seal replacement

7. BRAKE SYSTEM SERVICE AND REPAIR

The braking system section contains procedures for inspecting, adjusting, testing, and repairing service brake and parking brake components.

Included topics:

• Brake accumulator pressure testing
• Brake accumulator removal and installation
• Brake accumulator inspection
• Brake disc wear measurement
• Brake disc replacement
• Brake piston seal replacement
• Brake system charging checks
• Brake hydraulic circuit pressure testing
• Brake circuit pressure adjustment
• Brake retardation function testing
• Brake system bleeding
• Parking brake function testing
• Parking brake adjustment
• Parking brake pad replacement
• Parking brake removal and installation
• Parking brake disassembly and assembly

8. STEERING SYSTEM AND COMFORT DRIVE CONTROL

The steering section covers conventional steering components and Comfort Drive Control (CDC) equipment.

STEERING SYSTEM SERVICE

• Steering system function testing
• Steering hydraulic working pressure checks
• Steering pressure adjustment
• Left steering cylinder removal and installation
• Right steering cylinder removal and installation
• Steering cylinder reconditioning
• Steering accumulator inspection
• Steering accumulator removal and installation
• Secondary steering pump pressure testing and adjustment

COMFORT DRIVE CONTROL (CDC)

• CDC joystick replacement
• CDC angle sensor replacement
• CDC solenoid valve replacement
• CDC servo pressure testing
• CDC lever steering function checks

9. FRAME, WHEELS AND STRUCTURAL COMPONENTS

The manual contains servicing procedures for selected structural components.

Included topics:

• Counterweight removal and installation
• Frame joint bearing replacement
• Front wheel removal and installation
• Rear wheel removal and installation

10. OPERATOR CAB AND AIR CONDITIONING

The cab section provides service procedures for the operator cab, climate control equipment, and exterior components.

CAB AND EXTERIOR SERVICE

• Cab removal and installation
• Engine hood removal and installation
• Engine hood securing procedures
• Electric door opener servicing
• Door lock cylinder replacement
• Windscreen replacement
• Side window replacement
• Window pane installation
• Viscous cab suspension replacement
• Plastic hood repair

AIR CONDITIONING AND HEATING

• Air conditioning performance testing
• Air conditioning troubleshooting
• Climate Control Module (CCM) replacement
• Climate unit removal and installation
• Air conditioning compressor replacement
• Condenser replacement
• Evaporator replacement
• Expansion valve replacement
• Refrigerant draining
• Refrigerant filling and vacuum pumping
• Cooling unit leak detection
• Heater core replacement
• Heat control valve replacement
• Fan motor replacement
• Air mix door actuator replacement
• Drying filter replacement

11. HYDRAULIC SYSTEM AND WORKING EQUIPMENT

The hydraulic section provides detailed procedures for hydraulic pump servicing, pressure testing, accumulator maintenance, lift and tilt equipment, and optional hydraulic functions.

HYDRAULIC PUMPS AND PRESSURE TESTING

• Hydraulic pump P2 removal and installation
• Hydraulic pump P3 inspection
• Hydraulic pump P3 removal and installation
• Hydraulic standby pressure testing
• Hydraulic working pressure testing and adjustment
• Load-sensing pressure checks
• Servo pressure testing and adjustment
• Hydraulic system bleeding
• Hydraulic system warm-up procedures
• Hydraulic oil tank vacuum-pumping procedures

BOOM SUSPENSION SYSTEM

• Boom Suspension System function testing
• Boom suspension accumulator inspection
• Boom suspension accumulator pressure adjustment
• Boom suspension accumulator reconditioning
• Accumulator removal and installation
• Hydraulic pressure release procedures
• Boom suspension safety valve inspection and adjustment
• Boom suspension solenoid valve replacement

LIFT AND TILT HYDRAULICS

• Lift cylinder seal replacement in the machine
• Tilt cylinder seal replacement in the machine
• Lift and lower function testing
• Tilt function testing
• Lift angle sensor replacement
• Tilt angle sensor replacement
• Lift inductive sensor adjustment
• Tilt inductive sensor adjustment
• Lift function shock valve testing
• Tilt function shock valve testing

ADDITIONAL HYDRAULIC EQUIPMENT

• Third and fourth hydraulic function testing
• Third and fourth hydraulic pressure adjustment
• Hydraulic shock valve inspection
• Hydraulic solenoid valve replacement
• Attachment locking checks
• Hydraulic backup valve servicing
• Servo accumulator servicing
• Automatic lubrication pump reconditioning
• Automatic lubrication system updates
• Fire suppression system procedures following activation

DIAGNOSTICS, TESTING AND CALIBRATION

The manual includes diagnostic and service references associated with:

• Volvo Tech Tool operations
• Engine compression and pressure testing
• High-pressure fuel system checks
• AdBlue/DEF quality and crystallization checks
• DPF inspection and regeneration log checks
• Electronic control module replacement
• Transmission calibration error codes
• Hydraulic calibration error codes
• Brake and steering pressure testing
• Hydraulic system function tests
• Air conditioning troubleshooting

These procedures support systematic fault investigation and machine servicing.

BENEFITS OF THIS SERVICE REPAIR MANUAL

This technical publication can help users:

• Access Volvo L70H repair and servicing procedures
• Diagnose engine and fuel injection problems
• Maintain AdBlue/DEF, DPF, EGR, and SCR systems
• Service electronic control modules
• Test transmission operation and hydraulic pressures
• Inspect and adjust braking systems
• Maintain steering and Comfort Drive Control components
• Repair hydraulic pumps and cylinders
• Service the Boom Suspension System
• Maintain cab heating and air conditioning equipment
• Consult Volvo Tech Tool diagnostic references

WHO IS THIS MANUAL FOR?

This publication is intended for:

• Professional Volvo construction equipment mechanics
• Heavy equipment service technicians
• Construction machinery repair workshops
• Fleet maintenance departments
• Equipment maintenance companies
• Volvo L70H wheel loader owners responsible for servicing and repairs

IMPORTANT COMPATIBILITY INFORMATION

This manual is identified for the Volvo L70H Wheel Loader.

Before purchasing, verify the machine model, serial number, installed equipment, and relevant configuration.

Some procedures may apply only to particular machine versions or optional equipment.

The 2020 information update refers to the documentation and does not necessarily indicate the machine's manufacturing year.

DIGITAL PDF DOWNLOAD

This product is supplied as a digital PDF service repair manual.

What you receive:

• 951 pages of technical documentation
• Engine and fuel injection system service procedures
• AdBlue/DEF, DPF, EGR, and SCR maintenance
• Electrical and electronic control module servicing
• Transmission and axle repair procedures
• Brake and steering system servicing
• Comfort Drive Control maintenance
• Cab and air conditioning repair information
• Hydraulic system testing and servicing
• Boom Suspension System maintenance
• Volvo Tech Tool diagnostic references
• Digital delivery – no printed book will be shipped

A compatible PDF reader is required to access the document.

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Detailed contents:

(0) GENERAL
88830557 User Instruction
E 1708, Checking point
E1706
E1711
E-2001
E-2005
E-2014
E-2015
E-2017
Infrared Thermometer
Operation numbers for additional work
(1) STANDARD PARTS, SERVICE
AdBlue®DEF pump unit filter, replacing
Hydraulic pressure, checking
Parking brake, manually releasing
(2) ENGINE WITH MOUNTING AND EQUIPMENT
ACM (Aftertreatment control module) non-programmed, replacing
ACM (Aftertreatment control module) pre-programmed, replacing
AdBlue®DEF dosing injector, replacing
AdBlue®DEF hoses, replacing
AdBlue®DEF mixing tube, replacing
AdBlue®DEF pump unit, filter, replacing
AdBlue®DEF pump unit, flushing
AdBlue®DEF pump unit, inlet nipple, replacing
AdBlue®DEF pump unit, replacing
AdBlue®DEF quality, checking
AdBlue®DEF tank armature suction filter, replacing
AdBlue®DEF tank armature, cleaning
AdBlue®DEF tank armature, replacing
AdBlue®DEF tank, cleaning
AdBlue®DEF tank, replacing
AdBlue®DEF, draining
Carbon dioxide in coolant system, checking
Carbon dioxide in fuel system, checking
Coolant pump, replacing
Coolant valve, replacing
Cooling system pressure, checking
Crystallization of AdBlue®DEF, checking
Cylinder compression, testing
DOC (Diesel oxidation catalyst), replacing
DPF (Diesel particulate filter), checking and cleaning
EGR cooler, replacing
EGR reed valve, replacing
EGR valve, replacing
EGR venturi tube, cleaning
EGR venturi tube, replacing
Engine belts, replacing
Engine control module (ECM), replacing non-programmed
Engine control module (ECM), replacing pre-programmed
Engine mounting rear, changing
Engine, installing
Engine, removing
Engine, replacing (2)
Engine, replacing
Exhaust pipe flexible tube, replacing
Feed pump pressure, checking
Fuel control valve (FCV), replacing
Fuel rail pressure sensor, replacing
Fuel rail, replacing
Fuel system, bleeding
High pressure fuel pipes, replacing
High pressure fuel pump, replacing
Injector sleeves, replacing
Injectors, replacing
Inlet throttle, replacing
Lubrication oil consumption, checking
Lubrication oil pressure, checking with pressure gauge
Pressure relief valve (PRV), replacing
Radiator and charge air cooler, installling
Radiator and charge air cooler, removing
Regeneration log, checking
SCR (Selective catalytic reduction) dosing system, checking
SCR (Selective catalytic reduction) muffler, replacing
Stall speed, checking
Thermostat, replacing
Turbocharger, replacing
Valve cover, installing
Valve cover, removing
Valves, adjusting
(3) ELEC. SYSTEM; WARNINGS SYSTEM; INFORMATION SYSTEM; INSTRUMENTS
Batteries, replacing
Battery condition, checking
GPMECU1 non-programmed, replacing
GPMECU1 pre-programmed, replacing
GPMECU2 non-programmed, replacing
GPMECU2 pre-programmed, replacing
GPMECU3 non-programmed, replacing
GPMECU3 pre-programmed, replacing
HMICU non-programmed, replacing
HMICU pre-programmed, replacing
Starter lock, replacing
Starter motor, replacing
Tech Tool, operations (2)
Tech Tool, operations
W-ECU, replacing, non-programmed
W-ECU, replacing, pre-programmed
(4) POWER TRANSMISSION
Axle suspension bushes and seals, replacing
Axle, installing
Axle, removing
Differential lock, adjusting
Differential lock, function check
Error codes when calibrating
Gear selector valve, replacing one solenoid
Heat exchanger, replacing
Hub reduction, installing (2)
Hub reduction, installing
Hub reduction, removing (2)
Hub reduction, removing
Hub seal, replacing (2)
Hub seal, replacing
Hydraulic transmission, warming up
Lock up valve, replacing
Seal for front output shaft, replacing
Seal for rear output shaft, replacing
Transmission oil pressure, checking (2)
Transmission oil pressure, checking
Transmission, function check (2)
Transmission, function check
Transmission, installing
Transmission, removing
(5) BRAKE
Accumulator (removed) charging pressure, checking
Accumulator, discarding
Accumulator, installing
Accumulator, removing
Accumulators, checking in machine
Brake disc, replacing
Brake discs, measuring wear
Brake discs, replacing
Brake piston seals, replacing (2)
Brake piston seals, replacing
Brake system charging, checking
Brake system circuit pressure, checking and adjusting
Brake system retardation function, checking
Brake system, bleeding
Parking brake assembly, removing
Parking brake brake pads, replacing
Parking brake function, checking
Parking brake, adjusting
Parking brake, assembling
Parking brake, disassembling
Parking brake, installing
(6) STEERING
Accumulator, discarding
Comfort drive control (CDC) angle sensor, changing
Comfort Drive Control (CDC) joystick, changing
Comfort drive control (CDC) solenoid valve, changing
Comfort Drive Control, servo pressure, checking
Left steering cylinder, installing
Left steering cylinder, removing
Lever steering (CDC) function, checking
Right steering cylinder, installing
Right steering cylinder, removing
Secondary steering pump working pressure, checking and adjusting
Steering accumulator removed, checking
Steering accumulator, installing
Steering accumulator, removing
Steering cylinder removed, reconditioning excl replacing bearings
Steering system function, checking
Steering system working pressure, checking and adjusting
(7) FRAME;SPRINGS;DAMPING;AXLE SUSPENSION; WHEELTRACK UNIT
Counterweight, installing
Counterweight, removing
Frame joint, replacing bearings
Front wheel, installing
Front wheel, removing
Rear wheel, installing
Rear wheel, removing
(8) MACHINERY HOUSE; CAB;EXTERIOR TRIM PARTS ANYWHERE
Actuator, replacing
Air conditioning, checking performance
Air mix door actuator, replacing
Cab, installing
Cab, removing
CCM, replacing
Climate unit, installing
Climate unit, removing
Compressor, replacing
Condenser, replacing
Cooling unit, leak detection
Door lock cylinder, replacing (2)
Door lock cylinder, replacing
Drying filter, replacing
Electric door opener, control unit, replacing
Electric door opener, locking motor, replacing
Electric door opener, opening support motor, replacing
Electric door opener, rotor switch, replacing
Engine hood, installing
Engine hood, raising and securing
Engine hood, removing
Evaporator, replacing
Expansion valve, replacing
Fan motor, replacing
Heat control valve, replacing
Heater core, replacing
Operator’s seat, securing
Plastic hood, repairing
Refrigerant, draining
Refrigerant, filling incl vacuum pumping
Side window, replacing
Troubleshooting, air conditioning unit (AC)
Viscous cab suspension, changing one unit
Window pane, installing
Windscreen, replacing
(9) HYDRAULIC SYSTEM; DIGGING HANDING GRADING EQUIPM.; MISC.EQUIP
3rd4th hydraulic function, pressure, checking and adjusting
3rd4th hydraulic function, shock valve, checking
3rd4th hydraulic function, solenoid valve, replacing
3rd4th hydraulic, functional check
Accumulator removed, checking
Accumulator, boom suspension system, discarding
Accumulator, discarding (2)
Accumulator, discarding
Attachment locking, checking
Automatic lubrication pump unit, reconditioning
Back-up valve, checking and adjusting
Back-up valve, replacing
Bleeding air
Boom suspension accumulator, checking and adjusting
Boom suspension accumulator, reconditioning
Boom suspension system, accumulator, installing
Boom suspension system, accumulator, removing
Boom suspension system, checking
Boom suspension system, hydraulic oil pressure in accumulators, depressurizing
Boom suspension system, pressure reduction, safety valve, checking and adjusting
Boom suspension system, solenoid valve, replacing
Error codes when calibrating
Fire suppression system, actions after activation
Fire suppression system, actions after manual activation
Hydraulic couplings
Hydraulic cylinder, piston’s lock brace, installing
Hydraulic oil tank, vacuum-pumping, connecting and disconnecting pump
Hydraulic pump P2, installing
Hydraulic pump P2, removing
Hydraulic pump P3, checking
Hydraulic pump P3, installing
Hydraulic pump P3, removing
Hydraulic pump, standby pressure and working pressure, checking and adjusting
Hydraulic system, bleeding
Hydraulic system, warming up
Inductive sensor, lift, adjusting
Inductive sensor, tilt, adjusting
Lift cylinder, repacking in machine
Liftlower function, checking
Liftlower, angle sensor, changing
LS (load sense) pressure, checking
Servo accumulator, installing
Servo accumulator, removing
Servo pressure, at the spool in control valve, checking (2)
Servo pressure, at the spool in control valve, checking
Servo pressure, checking and adjusting
Shock valve lift function, checking
Shock valve, tilt function, checking
System test
Tech Tool, operations
Tilt cylinder, repacking in machine
Tilt inout, angle sensor, changing
Tilt, checking
Update of automatic lubrication system