Overview
The Volvo L90D Wheel Loader Service Repair Manual provides organized technical coverage for locating service information during maintenance and repairs. Coverage includes braking equipment, steering components, working and servo hydraulics, and electrical and instrument systems.
The contents also identify fuel injection timing references, crankshaft and connecting-rod components, working-hydraulics pumps, transfer gearbox components, and torque-converter components.
Table of Contents
Volvo L90D Manual
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01. General
- Description, Complete Machine — Product identification plates
- Specifications — Tightening torques
- Specifications — Volvo standard tightening torques
- Transport Instruction.; Storage Instruction; Operating Instruction — Transporting the machine
- Tool — Section 4 Power transmission
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02. Standard Parts, Service
- Lubricant; Fuel; Other Fluid — Recommended lubricants
- Service — Maintenance — Charging of batteries
- Service — Maintenance — Cleanliness, brake and hydraulic systems
- Service — Maintenance — Repairing the hydraulic system
- Service — Maintenance — Safety filter (secondary filter)
- Service — Emergency measures — Manual release of parking brake, L90D (later version)
- Service — Emergency measures — Manual release of parking brake, L120D
- Service — Emergency measures — Manual release of parking brake, L90D
- Service — Emergency measures — Starting with booster batteries
- Service — Emergency measures — Transporting wheel loader on another vehicle
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03. Engine with Mounting and Equipment
- General, engine installation and its function — Engine, installing
- General, engine installation and its function — Specifications, tightening torques
- General, engine installation and its function — Specifications, capacities
- General, engine installation and its function — Specifications, general
- Engine — Cylinder head — Description, cylinder head
- Engine — Cylinder block with crankcase ventilation — Description, pistons and piston rings, L90D
- Engine — Cylinder block with crankcase ventilation — Description, cylinder block
- Engine — Valve mechanism
- Engine transmission; camshaft — Description, engine transmission
- Engine — Crank shaft; connecting rod; vibration damper; fly wheel — Description, crankshaft
- Lubricating System — General, common info about 221 – 224 — Description, lubrication and oil system
- Lubricating System — General, common info about 221 – 224 — Specifications, L120D
- Lubricating System — Oil cooler, description
- Fuel System — General (common info about 233 – 238) — Description, general
- Fuel System — Fuel pump; filter; strainer
- Fuel System — Fuel tank; fuel filling pump — Specifications, capacities, L120D
- Fuel System — Injection pump; regulator; pump companion — Injection timing, checking and setting
- Fuel System — Injection pump; regulator; pump companion — Specifications, general, L120D
- Fuel System — Injector; delivery pipe — Copper tubes for injectors, changing
- Inlet System; Exhaust System — Turbo charger
- Inlet System; Exhaust System — Air cleaner with connections; air pre-heater — Specifications, air cleaner
- Cooling System — General, common info about 261 – 269
- Cooling System — Radiator, mounting and connections included — Radiator, removing and installing
- Cooling System — Coolant pump; thermostat — Coolant pump for Intercooler, removing and installing
- Cooling System — Coolant pump; thermostat — Hydraulically driven cooling fan, checking and adjusting speed
- Cooling System — Coolant pump; thermostat — Hydraulically driven cooling fan L120D, description
- Cooling System — Coolant pump; thermostat — Hydraulically driven cooling fan, checking and adjusting max. pressure
- Engine Control — Stop control — Stop solenoid, adjusting stroke
- Engine Control — Stop control — Stop solenoid, troubleshooting advice
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04. Elec. System; Warning System; Information System; Instruments
- Comprehensive info, electrical system — 2 Software functions, engine
- Comprehensive info, electrical system — 3 Software functions, electrical system
- Comprehensive info, electrical system — 4 Software functions, power transmission
- Comprehensive info, electrical system — 5 Software functions, brakes
- Comprehensive info, electrical system — 6 Software functions, steering system
- Comprehensive info, electrical system — 9 Software functions, hydraulic system
- Comprehensive info, electrical system — Air filter pressure
- Comprehensive info, electrical system — Aps Ii
- Comprehensive info, electrical system — Axle oil temperature
- Comprehensive info, electrical system — Back-up alarm
- Comprehensive info, electrical system — Boom Suspension System (BSS)
- Comprehensive info, electrical system — Brake pressure
- Comprehensive info, electrical system — Brake test
- Comprehensive info, electrical system — Break in computer communication
- Comprehensive info, electrical system — Central lubrication
- Comprehensive info, electrical system — Communication with data buses
- Comprehensive info, electrical system — Control units, software functions
- Comprehensive info, electrical system — Coolant temperature, engine
- Comprehensive info, electrical system — Coolant temperature, outlet, radiator (L120D with hydraulically driven radiator fan)
- Comprehensive info, electrical system — Description of software functions table
- Comprehensive info, electrical system — Differential lock
- Comprehensive info, electrical system — Downshift audible signal (beep)
- Comprehensive info, electrical system — Electrical system, description
- Comprehensive info, electrical system — Electrical system, instructions for working on the electrical system
- Comprehensive info, electrical system — Electrical system, specifications
- Comprehensive info, electrical system — Electronic control system, description
- Comprehensive info, electrical system — Engine oil pressure
- Comprehensive info, electrical system — Engine Shut Down (power reduction)
- Comprehensive info, electrical system — Engine Shutdown
- Comprehensive info, electrical system — Engine speed for V-ECU
- Comprehensive info, electrical system — Fuel level
- Comprehensive info, electrical system — Gear selector
- Comprehensive info, electrical system — Gearshifting solenoids
- Comprehensive info, electrical system — Hydraulic oil temperature (L120D with hydraulically driven radiator fan)
- Comprehensive info, electrical system — Instrument control unit I-ECU, functional description
- Comprehensive info, electrical system — Interval wiper
- Comprehensive info, electrical system — Limp-Home, by-passed V-ECU
- Comprehensive info, electrical system — Output brake pressure
- Comprehensive info, electrical system — Overspeed transmission
- Comprehensive info, electrical system — Parking brake, electric
- Comprehensive info, electrical system — Parking brake, mechanical (L90D)
- Comprehensive info, electrical system — Preheating of induction air
- Comprehensive info, electrical system — Radiator fan control (L120D with hydraulically driven radiator fan)
- Comprehensive info, electrical system — Reduced computer communication
- Comprehensive info, electrical system — Secondary steering
- Comprehensive info, electrical system — Service interval
- Comprehensive info, electrical system — Starter inhibitor
- Comprehensive info, electrical system — Starter motor engagement
- Comprehensive info, electrical system — System voltage
- Comprehensive info, electrical system — Transmission disengagement
- Comprehensive info, electrical system — Transmission oil filter
- Comprehensive info, electrical system — Transmission oil pressure
- Comprehensive info, electrical system — Transmission oil temperature
- Comprehensive info, electrical system — Travel speed
- Comprehensive info, electrical system — Tyre radius
- Comprehensive info, electrical system — Vehicle control unit V-ECU, functional description
- Comprehensive info, electrical system — Wiping during and after washing
- Battery; Energy Storage System; Mounting Parts — General, common info about 311 – 313 — Battery, charging
- Battery; Energy Storage System; Mounting Parts — General, common info about 311 – 313 — Battery, description
- Battery; Energy Storage System; Mounting Parts — General, common info about 311 – 313 — Battery, specifications
- Alternator; Charging; Electric Motor; Electric Drives — General, common info about 321 – 322 — Alternator, description
- Alternator; Charging; Electric Motor; Electric Drives — General, common info about 321 – 322 — Alternator, specifications
- Starting System — General, common info about 331 – 334 — Starter motor, specifications
- Starting System — General, common info about 331 – 334 — Starting system, description
- Starting System — Electric air pre-heater, excluding element — Preheating, description
- Lighting — General, common info about 351 – 356 — Lighting, description
- Lighting — General, common info about 351 – 356 — Lighting, specifications
- Cable; Fuse; Relay — General, common info about 371 – 379 — Chassis connections
- Cable; Fuse; Relay — General, common info about 371 – 379 — Electrical components
- Cable; Fuse; Relay — General, common info about 371 – 379 — Electrical symbols and designations
- Cable; Fuse; Relay — General, common info about 371 – 379 — Explanations of cable and component markings
- Cable; Fuse; Relay — General, common info about 371 – 379 — Key to communication cables
- Cable; Fuse; Relay — General, common info about 371 – 379 — Positive feed
- Cable; Fuse; Relay — General, common info about 371 – 379 — Signal earth
- Cable; Fuse; Relay — General, common info about 371 – 379 — Wiring diagram 8. Rotating beacon, direction indicators, brake lights
- Cable; Fuse; Relay — General, common info about 371 – 379 — Wiring diagram 11. Gearshifting solenoids, transmission disengagement
- Cable; Fuse; Relay — General, common info about 371 – 379 — Wiring diagram 12. Sensor transmission oil, mode selector, kickdown
- Cable; Fuse; Relay — General, common info about 371 – 379 — Wiring diagram 19. Heating, ventilation, air conditioning (AC)
- Cable; Fuse; Relay — General, common info about 371 – 379 — Wiring diagram 22. Work hydraulics, 3rd, 4th, 5th hydraulic functions
- Cable; Fuse; Relay — General, common info about 371 – 379 — Wiring diagram 23. Boom Suspension System (BSS), hydraulic oil temperature
- Cable; Fuse; Relay — General, common info about 371 – 379 — Wiring diagram 32. Mechanical parking brake with rider truck safety norms
- Cable; Fuse; Relay — General, common info about 371 – 379 — Wiring diagram 32B. Parking brake with rider truck safety norms
- Cable; Fuse; Relay — Electrical distribution box; fuse box; junction box — Electrical distribution box, description
- Instrument; Sensor; Warning and Information System — General, common info about 383 – 387
- Instrument; Sensor; Warning and Information System — Warning/information unit, display unit — Display panel and keypad, general
- Instrument; Sensor; Warning and Information System — Warning/information unit, display unit — Display panel, general
- Instrument; Sensor; Warning and Information System — Warning/information unit, display unit — Display panel, information displays
- Instrument; Sensor; Warning and Information System — Warning/information unit, display unit — Display panel, initial display
- Instrument; Sensor; Warning and Information System — Warning/information unit, display unit — Display panel, operating display
- Instrument; Sensor; Warning and Information System — Warning/information unit, display unit — Display panel, setting
- Instrument; Sensor; Warning and Information System — Warning/information unit, display unit — Middle instrument panel with warning lamps
- Instrument; Sensor; Warning and Information System — Warning/information unit, display unit — Service display unit, axles and brakes
- Instrument; Sensor; Warning and Information System — Warning/information unit, display unit — Service display unit, electrical control input signals 1
- Instrument; Sensor; Warning and Information System — Warning/information unit, display unit — Service display unit, electrical control input signals 2
- Instrument; Sensor; Warning and Information System — Warning/information unit, display unit — Service display unit, electrical control input signals 3
- Instrument; Sensor; Warning and Information System — Warning/information unit, display unit — Service display unit, electrical control output signals 1
- Instrument; Sensor; Warning and Information System — Warning/information unit, display unit — Service display unit, electrical control output signals 2
- Instrument; Sensor; Warning and Information System — Warning/information unit, display unit — Service display unit, electrical input sensor
- Instrument; Sensor; Warning and Information System — Warning/information unit, display unit — Service display unit, electrical system battery voltage
- Instrument; Sensor; Warning and Information System — Warning/information unit, display unit — Service display unit, engine
- Instrument; Sensor; Warning and Information System — Warning/information unit, display unit — Service display unit, general
- Instrument; Sensor; Warning and Information System — Warning/information unit, display unit — Service display unit, hydraulics
- Instrument; Sensor; Warning and Information System — Warning/information unit, display unit — Service display unit, settings
- Instrument; Sensor; Warning and Information System — Warning/information unit, display unit — Service display unit, transmission
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05. Power Transmission
- General, common info about 410 – 436 — Specifications, L90D
- Clutch; Torque Converter — Clutch control, manual or fixed — Specifications, L90D and L120D, general
- Clutch; Torque Converter — Hydrodynamic coupling, torque converter — Specifications, L120D
- Transmission, Hydraulic Control — Specifications, capacities
- Transmission, Hydraulic Control — Specifications, general
- Transmission, Hydraulic Control — Specifications, weight
- Transmission, hydraulic control — Clutch pressure chart, L90D∗
- Transmission, hydraulic control — Clutch pressure chart, L120D∗
- Transmission, hydraulic control — Gear selector valve, description
- Transmission, hydraulic control — Hydraulic transmission, checking oil pressure
- Transmission, hydraulic control — Symbol diagram, HT131, L90D
- Transmission, hydraulic control — Symbol diagram, HT205, L120D
- Transmission, hydraulic control — Transmission, installing
- Gearbox — Distributing gearbox — Specifications, capacities
- Front Axle; Rear Axle — General, common info about 461 – 468 — Specifications, L90D, general
- Front Axle; Rear Axle — General, common info about 461 – 468 — Specifications, L120D, general
- Front Axle; Rear Axle — General, common info about 461 – 468 — Specifications, L120D, weight
- Front Axle; Rear Axle — Front axle, installing
- Front Axle; Rear Axle — Front axle — Specifications, L90D, capacities
- Front Axle; Rear Axle — Front axle — Specifications, L120D, capacities
- Front Axle; Rear Axle — Rear axle 1 — Rear axle, installing
- Front Axle; Rear Axle — Rear axle 1 — Specifications, capacities
- Front Axle; Rear Axle — Differential lock, with control — Differential lock, adjusting
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06. Brake
- Comprehensive info about brakes
- Wheel Brake — General, common info about 511 – 519 — Specifications, general
- Hydraulic Brake System — General, common info about 520 – 522 — Brake system, bleeding
- Hydraulic Brake System — General, common info about 520 – 522 — Brake system, retardation, checking function
- Hydraulic Brake System — General, common info about 520 – 522 — Foot brake pedal, adjusting angle and pedal clearance
- Hydraulic Brake System — General, common info about 520 – 522 — Pressure in circuit, checking and adjusting
- Hydraulic Brake System — Brake valve — Specifications, general
- Hydraulic Brake System — Brake accumulator; hydraulic pump — Discarded accumulators
- Hydraulic Brake System — Brake accumulator; hydraulic pump — Specifications, L120D, general
- Parking Brake — General, common info about 551 – 554 — Parking brake (hydraulic), brake pad replacement, later version
- Parking Brake — General, common info about 551 – 554 — Parking brake (hydraulically controlled), checking and adjustment, later version
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07. Steering
- Comprehensive info, steering
- Steering — General, common info about 641 – 647 — Hydraulic diagram, steering, from and including chassis no. 17372
- Steering — General, common info about 641 – 647 — Hydraulic diagram, steering, incl. lever steering (CDC)
- Steering — General, common info about 641 – 647 — Hydraulic diagram, steering, incl. lever steering (CDC) and secondary steering
- Steering — General, common info about 641 – 647 — Hydraulic diagram, steering, incl. secondary steering
- Steering — General, common info about 641 – 647 — Hydraulic diagram, steering, from and including chassis no. 14445
- Steering — Hydraulic equipment — Hold (stand-by) pressure and working pressure, checking and adjusting
- Steering — Hydraulic equipment — Shift valve L120D, description
- Steering — Hydraulic equipment — Shift valve, reconditioning (removed)
- Steering — Hydraulic equipment — Specification L120D, general
- Steering — Hydraulic equipment — Steering pump, description
- Steering — Hydraulic equipment — Steering valve, description
- Steering — Supplementary steering
- Lever Steering — Hydraulic system, description
- Lever steering, checking and adjusting control valve
- Lever Steering — Wiring diagrams 17 and 9
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08. Frame; Springs; Damping; Axle Suspension; Wheel/track Unit
- Comprehensive info about frame and track unit/wheels
- Frame — General, common info about 711 – 718 — Specifications, tightening torques
- Frame, complete — L120D specifications, weight
- Frame — Protection; belly plate; bumper — Specifications, weight
- Frame — Counterweight — L120D specifications, weight
- Wheels; Tracks; Tyre; Hub; Drum — General, common info about 771 – 775 — L120D specifications, weight
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09. Machinery House; Cab; Exterior Trim Parts Anywhere
- Cab, Naked; Canopy — Cab suspension, description
- Cab, Naked; Canopy — Cab, installing
- Cab, Naked; Canopy — Cab, removing
- Cab, Naked; Canopy — Tightening torques
- Air Conditioning Unit — General, common info about 872 – 877
- Air Conditioning Unit — Cooling unit — Air conditioning, checking performance
- Air Conditioning Unit — Cooling unit — Air-conditioning unit, specifications
- Air Conditioning Unit — Cooling unit — Evaporator in the air-conditioning unit, cleaning
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10. Hydraulic System; Digging/ Handling/ Grading Equipm.; Misc. Equip.
- Working Hydraulics; Servo Hydraulics — General, common info about 911 – 917 — Hydraulic diagram, working hydraulic system
- Working Hydraulics; Servo Hydraulics — General, common info about 911 – 917 — Hydraulic diagram L90D, complete
- Working Hydraulics; Servo Hydraulics — General, common info about 911 – 917 — Hydraulic diagram L120D, complete
- Working Hydraulics; Servo Hydraulics — General, common info about 911 – 917 — Hydraulic diagram, working hydraulic system incl. attachment locking and 3rd/4th function
- Working Hydraulics; Servo Hydraulics — General, common info about 911 – 917 — Hydraulic diagram, working hydraulic system incl. attachment locking and 3rd function
- Working Hydraulics; Servo Hydraulics — General, common info about 911 – 917 — Specifications, L120D, capacities
- Working Hydraulics; Servo Hydraulics — General, common info about 911 – 917 — Specifications, general
- Working Hydraulics; Servo Hydraulics — Working hydraulics — Shock and anti-cavitation valve
- Working Hydraulics; Servo Hydraulics — Working hydraulics — Specification L120D, general
- Working Hydraulics; Servo Hydraulics — Working hydraulics — Specification L90D, general
- Working Hydraulics; Servo Hydraulics — Working hydraulics — Specifications, L120D, capacities
- Working Hydraulics; Servo Hydraulics — Working hydraulics — Specifications, L90D, capacities
- Working Hydraulics; Servo Hydraulics — Working hydraulics — Specifications, weight
- Working Hydraulics; Servo Hydraulics — Pump, working hydraulics — Back-up valve, opening pressure, checking
- Working Hydraulics; Servo Hydraulics — Pump, working hydraulics — L90D specifications, weight
- Working Hydraulics; Servo Hydraulics — Pump, working hydraulics — L120D specifications, weight
- Working Hydraulics; Servo Hydraulics — Pump, working hydraulics — Shock valve, lift function, checking and adjusting
- Working Hydraulics; Servo Hydraulics — Pump, working hydraulics — Shock valve, tilt function, checking and adjusting
- Working Hydraulics; Servo Hydraulics — Pump, working hydraulics — Specification L90D, general
- Working Hydraulics; Servo Hydraulics — Pump, working hydraulics — Specification L120D, general
- Working Hydraulics; Servo Hydraulics — Pump, working hydraulics — Specifications, tightening torques
- Working Hydraulics; Servo Hydraulics — Servo hydraulic system — Pressure back-up for servo circuit, checking accumulator
- Working Hydraulics; Servo Hydraulics — Servo hydraulic system — Servo pressure, checking and adjusting (machine with separate attachment locking)
- Working Hydraulics; Servo Hydraulics — Servo hydraulic system — Servo pressure, checking and adjusting (machine without separate attachment locking)
- Working Hydraulics; Servo Hydraulics — Servo hydraulic system — Servo pressure, checking by spool in control valve
- Working Hydraulics; Servo Hydraulics — Servo hydraulic system — Servo valve, functional description
- Working Hydraulics; Servo Hydraulics — Servo hydraulic system — Specification L90D, general
- Working Hydraulics; Servo Hydraulics — Servo hydraulic system — Specification L120D, general
- Working Hydraulics; Servo Hydraulics — Servo hydraulic system — Specifications, weight
- Working Hydraulics; Servo Hydraulics — Other hydraulic equipment — Boom Suspension System (BSS400), checking function
- Working Hydraulics; Servo Hydraulics — Other hydraulic equipment — Boom Suspension System (BSS400), electrical system description
- Working Hydraulics; Servo Hydraulics — Other hydraulic equipment — Boom Suspension System (BSS400), hydraulic system description
- Working Hydraulics; Servo Hydraulics — Other hydraulic equipment — Precharge pressure in accumulators, checking and adjusting
- Working Hydraulics; Servo Hydraulics — Other hydraulic equipment — Pressure reducing valve (CT8) for Boom Suspension System, adjusting
- Working Hydraulics; Servo Hydraulics — Other hydraulic equipment — Specification L120D, general
- Unit, Load Handling — Lifting frame work with mounting and link arm system — L90D specifications, weight
- Unit, Load Handling — Lifting frame work with mounting and link arm system — L120D specifications, weight
- Unit, Load Handling — Lifting frame work with mounting and link arm system — Specification L90D, general
- Unit, Load Handling — Lifting frame work with mounting and link arm system — Specification L120D, general
- Unit, Load Handling — Lifting frame work with mounting and link arm system — Specifications, tightening torques
- Unit, Load Handling — Lifting frame work with mounting and link arm system — Tilt cylinder
Transmission Designations and Component References
The transmission-related entries name HT131 and HT205. These designations identify particular component references; the machine model alone does not replace the transmission identification used in those entries.
Keep the named assembly and its associated test, diagram or repair heading together when locating service information.
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