Service manual Volvo BL71 PLUS Backhoe Loader | 2025

(0) GENERAL
– (00) DESCRIPTION, COMPLETE MACHINE
— (000) General
— Description
– (03) SPECIFICATIONS
— (030) General
— Volvo standard tightening torques
— Conversion tables
— Tightening torque
— Engine, specifications
— Engine, weights
— Engine, capacities
— Engine, tightening torque
— Engine mount, tightening torque
— Lubrication system, specification
— Fuel system, specifications
— Inlet and exhaust system, specification
— Inlet and exhaust system, tightening torques
— Cooling system, specifications
— Cooling system, tightening torques
— Electrical system, specifications
— Battery, specifications
— Alternator, specifications
— Starter motor, specifications
— Preheating, specifications
— Lighting, specifications
— Torque converter, specifications
— Powershift transmission, specifications
— Transmission, tightening torques
— Transmission mounts, tightening torque
— Powershift transmission, weights
— Gearbox, specifications
— Gearbox, weights
— Gearbox, capacities
— Propeller shaft, tightening torque
— Front axle, weight
— Front axle, capacities
— Axles to frame, tightening torques
— Rear axle, specification
— Rear axle, weight
— Rear axle, capacities
— Wheel brake, specification
— Service brake, specifications
— Steering, specification
— Frame, specifications
— Counterweight, specifications
— Counterweight, tightening torques
— Wheels, weights
— Wheels, tightening torques
— Cab, tightening torques
— Cab, weights
— Canopy, weights
— Air conditioning, specifications
— Hydraulic system, specification
— Steering, hydraulic equipment, specifications
— Hydraulic system, weights
— Hydraulic system, capacities
— Valve block, specification
— Valve block, tightening torques
— Hose rupture valves (safety valves), specification
— Hydraulic pump, specification
— Hydraulic pumps, tightening torques
— Servo pump, specifications
— Accumulator, specification
— Hammer, specification
— Cylinders loader unit, specification
— Cylinders backhoe unit, specification
– (07) STANDARD TIME
— (070) General
— Operation numbers for additional work
– (08) TOOL
— (080) General
— E 1708, Checking point
— E1820
(1) STANDARD PARTS, SERVICE
– (16) LUBRICANT; FUEL; OTHER FLUID
— (160) General
— Recommended lubricants, oils
— Alternative fuels
– (17) SERVICE
— (170) General, common info about 171 – 179
— Service
— Safety when servicing
— (172) Warranty service
— Warranty inspection
— Warranty inspection, 100 hours
— Warranty inspection, 1000 hours
— (173) Maintenance
— Service positions
— Service points
— Maintenance service, general
— Test-run and check
— Tyres, wear and air pressure, checking
— Transmission breather filter, replacing
— Bolted joints, check tightening torque
— Lubrication
— Leakage, checking
— Pipes, couplings and hoses, check
— Engine oil level, check
— Coolant level, check
— Coolant, change
— Engine radiator, oil cooler and condensor (if installed), clean
— Fuel system, water trap, check/drain
— Engine oil and filter, changing
— Fuel filters, primary and secondary filter, replace
— Fuel system, bleeding
— Engine, air cleaner filter, replacing
— Engine, air cleaner filter, replacing
— Valve clearance, checking
— Turbocharger inclusive inlet and exhaust systems, leakage, check
— Engine speed
— Battery, current capacity, electrolyte level, cables and connections, especially connections at starter motor, check
— Transmission including torque converter, check pressure
— Transmission oil level, checking
— Transmission, changing oil
— Transmission, replacing oil filter
— Transmission suction filter, replacing
— Axles, checking oil level
— Axle hubs, checking oil level
— Axles, changing oil
— Axle hubs, changing oil
— Axle breather, cleaning
— Service brake, checking pressure
— Steering cylinders, locking of pivot pins, checking
— Steering pressure and stand-by pressure, checking and adjusting
— Extendible dipper (if installed) wear pads, check
— Stabiliser legs, check wear pads (BL61B, BL71B)
— Cab filter, replace (clean when necessary)
— BRAKE TEST
— Gas springs, doors, rear window, check function
— Hydraulic system, pressure release
— Hydraulic system, checking oil level
— Hydraulic pressure, checking
— Hydraulic system, changing oil
— Hydraulic system, breather filter
— Hydraulic system, replacing filter
— Hydraulic locking cylinders for sideshift mechanism, check (BL61, BL71, BL61 Plus, BL71 Plus)
— Hydraulic cylinders, check for oil leakage
— Wheel nuts, torque, check
— Stabilisers, loader, backhoe, front axle oscillation pivot and front axle steering pivots, lubricate
— Boom lock functions, check
— Propeller shaft, lubrication
— Hammer (if installed) hydraulic circuit, check flow and pressures
— Hammer, lower tool bushing, check for wear, see Operator’s manual for hammer
— Hammer, tool retaining pin and the tool, check, see Operator’s manual
— Hammer, lubricate every two hours, see Operator’s manual for hammer
— Hammer, hydraulic hoses and connections, check
— Hammer, seals and accumulator membranes, replace
— Accumulator, check pre-charging pressure
— Service journal (included in Operator’s manual), fill in
– (19) GENERAL
— (191) Safety equipment, without own function group
— Service positions
— Rules when handling tyres
— Starting with booster batteries
(2) ENGINE WITH MOUNTING AND EQUIPMENT
– (20) GENERAL
— (200) General, engine installation and its function
— Engine, description
— Engine, weights
— Engine, capacities
– (21) ENGINE
— (210) General, common info about 211 – 218
— Engine, specifications
— Engine, removal
— Engine, installation
— Engine, tightening torques
— (214) Valve mechanism
— Valves, adjusting
— Valves, description
— Valves, adjusting
– (22) LUBRICATING SYSTEM
— (220) General, common info about 221 – 224
— Lubrication system, specification
— Lubrication system, description
— (221) Oil pump; line
— Oil pressure, checking
– (23) FUEL SYSTEM
— (230) General (common info about 233 – 238)
— Fuel system, specifications
— Fuel system, description
— (233) Fuel pump; filter; strainer
— Fuel feed pump, removal
— Fuel feed pump, installation
— Fuel system, bleeding
— Fuel filter, replacing
— Feed pump, checking feed pressure
— (234) Fuel tank; fuel filling pump
— Fuel tank, removal
— Fuel tank, installation
– (25) INLET SYSTEM; EXHAUST SYSTEM
— (250) General, common info about 251 – 258
— Inlet and exhaust system, specification
— (252) Silencer; exhaust pipe
— Silencer, replacing
— (255) Turbo charger
— Turbocharger, description
– (26) COOLING SYSTEM
— (260) General, common info about 261 – 269
— Cooling system, tightening torques
— Cooling system, description
— Cooling system, specifications
— (261) Radiator, mounting and connections included
— Radiator, removal
— Radiator, installation
— Expansion tank, replacement
— Radiator, hose upper, replacement
— Radiator, hose lower, replacement
— (263) Fan; fan shroud; fan coupling
— Fan belt, replacement
— Fan shroud, replacing
— Fan shroud, additional sheet, installing
– (27) ENGINE CONTROL
— (271) Revs control, foot operated
— Accelerator control cable, replacement
— (272) Revs control, hand operated
— Accelerator control cable, replacement
(3) ELEC. SYSTEM; WARNING SYSTEM; INFORMATION SYSTEM; INSTRUMENTS
– (30) GENERAL
— (300) Comprehensive info, electrical system
— Electrical system, work instructions
— Electrical system, description
— Electronic control system, description
— Limp-Home mode, by-passed V-ECU
— Service light
— V-ECU, software functions
— Fuel shut-off
— Working lights
— Direction indicators
— Hazard lights
— Hour meter
— Code lock (option)
— Air conditioning compressor (option)
— Forward / Reverse / Neutral
— Hydraulic pump flow regulation
— Tachometer
— Loader lever lock
— Hydraulic attachment bracket, backhoe (option)
— Hydraulic attachment bracket, loader (option)
— Four–wheel drive
— Boom suspension system
— Electrical system, specifications
— (301) Software documents, complete vehicle
— Starter motor engagement
— Differential lock
— (302) Faulttracing
— Troubleshooting, general
— Collection of basic data
— Lead and connector checks
— Special tools
— Electrical troubleshooting, Powershift transmission
— Solenoids, testing
— Wires, testing
— Gear selector switch, testing
— Loader lever, electrical measuring
– (31) BATTERY; ENERGY STORAGE SYSTEM; MOUNTING PARTS
— (310) General, common info about 311 – 313
— Battery ground lead, changing
— (311) Battery
— Battery, storage
— Battery, specifications
— Battery, description
— Battery, checking electrolyte
— Battery, charging
— Battery, changing
– (32) ALTERNATOR; CHARGING; ELECTRIC MOTOR; ELECTRIC DRIVES
— (321) Alternator inclusive drive
— Alternator, specifications
— Alternator, description
– (33) STARTING SYSTEM
— (330) General, common info about 331 – 334
— Starter motor, specifications
— Starter motor, description
— (333) Electric air pre-heater, excluding element
— Preheating, specifications
— Preheating, description
– (35) LIGHTING
— (350) General, common info about 351 – 356
— Lighting, specifications
— Lighting, description
– (36) OTHER ELECTRICAL EQUIPMENT
— (366) Automatic control/blocking function, lacking a function group of its own
— Transmission control unit T-ECU, description
— Vehicle control unit V-ECU, description
— V–ECU, changing
– (37) CABLE; FUSE; RELAY
— (370) General, common info about 371 – 379
— Electrical symbols and designation
— Cables, description
— Cable harnesses, description
— Component list, Alternator, batteries, code lock, radio
— Component list: Alternator, batteries, code lock, radio, V–ECU
— Component list, Antennas (Care Track)
— Component list, Diodes
— Component list, Distribution boxes and control units
— Component list, fuses
— Component list, Heating coils
— Component list, instruments
— Component list, LED Indicators
— Component list, lights
— Component list, motors
— Component list, relays
— Component list, resistors
— Component list, sensors
— Component list, Solenoid valves
— Component list, Sounders
— Component list, Switches
— T-ECU, Inputs and outputs
— V–ECU, inputs and outputs
— Wiring diagram, general
— Wiring diagram 1
— Wiring diagram 2
— Wiring diagram 2
— Wiring diagram 3
— Wiring diagram 3
— Wiring diagram 4
— Wiring diagram 4
— Wiring diagram 5
— Wiring diagram 5
— Wiring diagram 6
— Wiring diagram 6
— Wiring diagram 7
— Wiring diagram 7
— Wiring diagram 8
— Wiring diagram 8
— Wiring diagram 9
— Wiring diagram 9
— Wiring diagram 10
— Wiring diagram 10
— Wiring diagram 11
— Wiring diagram 11
— Wiring diagram 12
— Wiring diagram 12
— Wiring diagram 13
— Wiring diagram 13
— Wiring diagram 14
— Wiring diagram 15
— Wiring diagram 17
— Wiring diagram 20
— Wiring diagram 21
— Wiring diagram 22
— Wiring diagram 23
— Wiring diagram 25
— Wiring diagram 26
— Wiring diagram 27
— Wiring diagram 28
— Wiring diagram 29
— Wiring diagram 30
— Wiring diagram 31
— Wiring diagram 32
— Wiring diagram 33
— Wiring diagram 34
(4) POWER TRANSMISSION
– (40) GENERAL
— (400) General, common info about 410 – 436
— Power transmission, description
— Powershift transmission, description
— Power transmission, troubleshooting
– (41) CLUTCH; TORQUE CONVERTER
— (414) Hydrodynamic coupling, torque converter
— Torque converter, specifications
— Torque converter, description
— Torque converter, removal
— Torque converter, installation
– (42) TRANSMISSION, HYDRAULIC CONTROL
— (420) General
— Solenoid valves, description
— Powershift transmission, specifications
— Powershift transmission, weights
— Transmission control unit T-ECU, description
— Electrical troubleshooting, Powershift transmission
— Solenoids, testing
— Wires, testing
— Gear selector switch, testing
— Solenoid valve, changing
— Powershift transmission, checking hydraulic pressures
— Hydraulic diagram, Powershift transmission
— Transmission, tightening torques
– (43) GEARBOX,
— (430) General
— Solenoid valves, description
— (431) Gearbox
— Gearbox, specifications
— Gearbox, weights
— Gearbox, capacities
— Gearbox 4WD, description
— Gearbox, removing
— Gearbox, installing
— Gearbox 4WD, checking oil pressure
— (436) Mounting, distributing gearbox
— Transmission mounts, changing
– (46) FRONT AXLE; REAR AXLE
— (461) Front axle
— Front axle, weight
— Front axle, capacities
— Front axle, removing
— Axle suspension, adjusting axial clearance
— (463) Rear axle 1
— Rear axle, specification
— Rear axle, weight
— Rear axle, capacities
— Rear axle, removing, installing
– (49) MISCELLANEOUS
— (490) General, common info about 491 – 492
— Hydraulic diagram, gearbox 4WD
— Hydraulic diagram, Powershift transmission
(5) BRAKE
– (50) GENERAL
— (500) Comprehensive info about brakes
— General description
— BRAKE TEST
– (51) WHEEL BRAKE
— (510) General, common info about 511 – 519
— Wheel brake, specification
— (517) Rear wheel brake, axle 1, wet brake
— Brake discs, checking wear
— Brake discs, changing
– (52) HYDRAULIC BRAKE SYSTEM
— (520) General, common info about 520 – 522
— Service brake, specifications
— Service brake, description
— Service brake, checking pressure
— Service brake, bleeding
— (525) Brake valve
— Brake valve, removal
— Brake valve, installing
– (55) PARKING BRAKE
— (550) General, common info about 551 – 554
— Parking brake, description
— (551) Brake control, mechanical
— Parking brake cable, changing
— Parking brake cable, adjustment
(6) STEERING
– (60) GENERAL
— (600) Comprehensive info, steering
— Steering, specification
— Steering, tightening torques
— Steering, description
— Steering, troubleshooting
– (62) STEERING AXLE
— (622) Steering axle; steering spindle, driving
— Steering axle and swivel-joint, description
— Steering knuckle, changing king pins
— Toe – in, adjustment
– (64) STEERING
— (640) General, common info about 641 – 647
— Steering valve, description
— Priority valve, description
— (643) Steering arm; steering linkage; track rod
— Steering angle, adjustment
— Steering angle, adjustment
— (645) Hydraulic equipment
— Steering, hydraulic equipment, specifications
— Steering cylinder, removal
— Steering cylinder, installation
— Steering valve, removal
— Steering valve, installation
(7) FRAME; SPRINGS; DAMPING; AXLE SUSPENSION; WHEEL/TRACK UNIT
– (70) GENERAL
— (700) Comprehensive info about frame and track unit/wheels
— Frame, specifications
— Frame, description
– (71) FRAME
— (716) Counterweight
— Counterweight, description
— Counterweight, specifications
— Counterweight, removal
— Counterweight, installation
— Additional counterweight, removal
— Additional counterweight, installation
– (77) WHEELS; TRACKS; TYRE; HUB; DRUM
— (771) Wheel
— Wheels, weights
— Wheels, tightening torques
— Front wheel, removing
— Front wheel, installing
— Rear wheel, removal
— Rear wheel, installation
(8) MACHINERY HOUSE; CAB; EXTERIOR TRIM PARTS ANYWHERE
– (80) GENERAL
— (800) Comprehensive info, machinery house and cab
— Cab, weights
— Canopy, weights
— Cab, tightening torques
— Cab, description
— Cab, service position
– (82) ENGINE HOOD; MUDGUARD; FOOT STEP
— (821) Engine hood with assembly parts
— Engine hood, removal
— Engine hood, installation
– (84) TRIM PART, OUTSIDE; GLASS; SEALING MOULDING
— (843) Glass; sealing moulding
— Windows, general
— Window panes, glued, replacing
– (85) CAB INTERIOR/UPHOLSTERY
— (851) Upholstery
— Front panel, removal
— Front panel, installing
— Side panel, removal
— Side panel, installation
— Headliner, removal
— Headliner, installation
— (852) Driver’s seat, complete; instructor’s seat
— Operator’s seat, removal
— Operator’s seat, installation
– (87) AIR CONDITIONING UNIT
— (870) General, common info about 872 – 877
— Climate control system, description
— (874) Cooling unit
— Air conditioning, specifications
— Air conditioning, description
(9) HYDRAULIC SYSTEM; DIGGING/ HANDLING/ GRADING EQUIPM.; MISC. EQUIP.
– (90) GENERAL
— (900) General
— Cleanliness when working on hydraulic components
— Hydraulic diagram
— Hydraulic oil, description
— Hydraulic oil, storage and handling
— Hydraulic components, storing and transporting
— Hydraulic system, repair of hydraulic components in workshop
— Vacuum pump, connection
— Vacuum pump, disconnection
— Hydraulic system, bleeding air
— Load cycle times, specifications
– (91) WORKING HYDRAULICS; SERVO HYDRAULICS
— (910) General, common info about 911 – 917
— Hydraulic system, specification
— Hydraulic system, weights
— Hydraulic system, capacities
— Hydraulic system, description
— Hydraulic pressure, setting
— Hydraulic control unit, H-ECU, description
— Hydraulic system, pressure release
— (911) Tank; line; oil cooling; filter; breather; filling pump
— Hydraulic oil tank, description
— Hydraulic oil cooler, description
— Hydraulic oil tank, removing
— Hydraulic oil tank, installing
— Hydraulic oil cooler, removal
— Hydraulic oil cooler, installation
— (912) Working hydraulics
— Cleaning and inspection
— Valve block, specification
— Valve block, tightening torques
— Working hydraulics, description
— Valve block, description
— Hose rupture valves (safety valves), specification
— Hose rupture valves (safety valves) for loader, description
— Hose rupture valve (safety valve) for boom cylinder, description
— Hose rupture valve (safety valve) for dipper arm cylinder, description
— Backhoe hose rupture valves (safety valves), checking
— Lowering of backhoe with hose rupture valves (safety valves)
— Valve block, changing seal in dipper and slew spools.
— Valve block, removal
— Valve block, installation
— (913) Pump, working hydraulics
— Hydraulic pump, specification
— Hydraulic pumps, tightening torques
— Hydraulic pump, description
— Hydraulic pump, removal
— Hydraulic pump, installation
— Hydraulic pump, replacing
— (914) Servo hydraulic system
— Servo pump, specifications
— Accumulator, specification
— Servo pump, description
— Accumulator, description
— Servo pump, removal
— Servo pump, installing
— (916) Other hydraulic equipment
— Boom Suspension System, precharging pressure in accumulators, checking and adjusting
— Accumulator, checking
– (92) MECHANICAL EQUIPMENT/ATTACHMENT
— (925) Bucket, incl. possible cylinders with tubes and hoses
— Multi-purpose bucket cylinder, changing
— Bucket assembly, replacing
— (926) Attachments, others
— Hammer, specification
— Hammer, description
— Hammer, connection
— Hammer, disconnection
– (94) UNIT, LOAD HANDLING
— (940) General, common info about 941 – 945
— Cylinders loader unit, specification
— Hydraulic cylinders, tightening torques
— Cylinders loader unit, description
— (945) Lifting frame work with mounting and link arm system
— Self level function, description
— Lift cylinder, reconditioning
— Tilt cylinder, reconditioning
– (97) UNIT, DIGGING
— (970) General, common info about 971 – 975
— Cylinders backhoe unit, specification
— Hydraulic cylinders, tightening torques
— Cylinders backhoe unit, description
— Boom lock, description
— (971) Slewing system, boom
— Swing cylinder, renovation
— (972) Stabiliser; stabiliser blade
— Outriggers, description
— Stabilizer cylinder, removing
— Stabilizer cylinder, installing
— Stabilisers, reconditioning hydraulic cylinder
— Stabilisers wearpads, adjusting
— Stabiliser wear pads, replacing
— Stabiliser legs, cleaning
— (974) Boom with links
— Boom bushing, removal
— Boom cylinder, removal
— Boom cylinder, installation
— Boom cylinder, renovation
— Boom lock cylinder, reconditioning
— (975) Dipper arm with links
— Dipper arm cylinder, removal
— Dipper arm cylinder, installation
— Dipper arm cylinder, renovation
— Extendible dipper arm cylinder, removal
— Extendible dipper arm cylinder, installation
— Extendible dipper arm cylinder, renovation
— Bucket cylinder, removal
— Bucket cylinder, installation
— Bucket cylinder, renovation