Volvo L120C Wheel Loader Repair Manual

Table of Content L120C Service Information

GENERAL
DESCRIPTION, COMPLETE MACHINE
General
General
Volvo standard tightening torques
STANDARD TIME
General
TOOL
General
STANDARD PARTS, SERVICE
LUBRICANT; FUEL; OTHER FLUID
General
SERVICE
Emergency measures
Manual release of parking brake
Removing propeller shafts
Miscellaneous
ENGINE WITH MOUNTING AND EQUIPMENT
GENERAL
General, engine installation and its function
ENGINE
General, common info about 211 – 218
Valve mechanism
LUBRICATING SYSTEM
General, common info about 221 – 224
Specifications, tightening torques
Oil pump; line
Oil pump, removing and installing
FUEL SYSTEM
General (common info about 233 – 238)
Fuel pump; filter; strainer
Feed pump, checking feed pressure
Fuel tank; fuel filling pump
Fuel tank, removing and installing
Injection pump; regulator; pump companion
Idling speed, checking and adjusting
Injector; delivery pipe
INLET SYSTEM; EXHAUST SYSTEM
Turbo charger
Air cleaner with connections; air pre-heater
Charge air cooler with connections
COOLING SYSTEM
General, common info about 261 – 269
Coolant pump; thermostat
Coolant pump for intercooler, reconditioning
Coolant pump for intercooler, removing and installing
Coolant pump, removing and installing
ENGINE CONTROL
Stop control
Stop solenoid, adjusting stroke
(solenoid positioned on inside of the radiator “bow”)
Stop solenoid, adjusting stroke
(Solenoid positioned on the engine)
Stop solenoid, fault-tracing tips
Cold start control
ELEC. SYSTEM; WARNING SYSTEM; INFORMATION SYSTEM; INSTRUMENTS
GENERAL
Comprehensive info, electrical system
Special instructions for working on the electrical system
BATTERY; ENERGY STORAGE SYSTEM; MOUNTING PARTS
Battery
Safety when working with batteries
ALTERNATOR; CHARGING; ELECTRIC MOTOR; ELECTRIC DRIVES
General, common info about 321 – 322
Alternator inclusive drive
Alternator 100 A, checking and adjusting voltage
STARTING SYSTEM
Starter motor inclusive solenoid
LIGHTING
General, common info about 351 – 356
Lighting, front, including parking light and day running light
OTHER ELECTRICAL EQUIPMENT
Automatic control/blocking function, lacking a function group of its own
General description of the control unit (ECU)
Other electrical functions (controlled by the control unit)
CABLE; FUSE; RELAY
General, common info about 371 – 379
Codes used in wiring diagrams
Explanations of wiring diagrams (lead and component marking)
Loud tone horn∗, seat with air suspension∗
Wiring diagram, circuit 16:1 — 16:8
Wiring diagram, circuit 17:1 — 17:5
Wiring diagram, circuit 18:1 — 18:8
Electrical distribution box; fuse box; junction box
Electrical distribution box
INSTRUMENT; SENSOR; WARNING AND INFORMATION SYSTEM
General, common info about 383 – 387
Sender, monitoring system
Air conditioning, pressure monitor, SE22, checking
Air conditioning, thermostat, SE21, checking
Axle oil temperature, SE84 and SE84, checking
Engine temperature, SE1, checking
Transmission oil temperature, SE11, checking
Warning/information unit, display unit
Contronic Service Display Unit
POWER TRANSMISSION
GENERAL
General, common info about 410 – 436
CLUTCH; TORQUE CONVERTER
Clutch control, manual or fixed
Hydrodynamic coupling, torque converter
TRANSMISSION, HYDRAULIC CONTROL
General
Specifications, capacities (dm3 = litre)
Transmission, hydraulic control
Transmission, checking oil pressure
GEARBOX,
Distributing gearbox
Specifications, capacities (dm3 = litre)
FRONT AXLE; REAR AXLE
General, common info about 461 – 468
Rear axle suspension, measuring axial and radial clearance
The axial clearance of the rear axle bridge, adjusting
Wear ring (differential carrier assembly), replacing
Front axle
Specifications, capacities (dm3 = litre)
Rear axle 1
Specifications, capacities (dm3 = litre)
Differential lock, with control
BRAKE
GENERAL
Comprehensive info about brakes
WHEEL BRAKE
General, common info about 511 – 519
Brake discs, checking wear (with built-in wear indicator)
Brake discs, checking wear (without built-in wear indicator)
HYDRAULIC BRAKE SYSTEM
General, common info about 520 – 522
Checking function
Foot brake pedal, adjusting angle and pedal free travel
Pressure in circuit, checking and adjusting
Brake valve
Foot brake valve (removed), reconditioning
Brake accumulator; hydraulic pump
Accumulator, checking (removed)
PARKING BRAKE
General, common info about 551 – 554
Parking brake (mechanically operated), checking and adjusting
Parking brake, replacing discs
STEERING
GENERAL
Comprehensive info, steering
STEERING
General, common info about 641 – 647
Hydraulic diagram, lever steering (CDC)∗ and secondary steering∗
Hydraulic equipment
Shift valve, reconditioning (removed)
Shift valve, description
Stand-by pressure and working pressure, checking and adjusting
Steering pump, reconditioning (removed)
Steering valve, reconditioning (removed)
Supplementary steering
LEVER STEERING
General
Lever steering, adjusting steering speed
Lever steering, checking and adjusting control valve
Steering lever CU3, checking input/output voltage
FRAME; SPRINGS; DAMPING; AXLE SUSPENSION; WHEEL/TRACK UNIT
GENERAL
Comprehensive info about frame and track unit/wheels
FRAME
Frame, complete
Protection; belly plate; bumper
Counterweight
Specifications, tightening torques
FRAME LINK
Bearings
Frame joint, replacing bearings
WHEELS; TRACKS; TYRE; HUB; DRUM
Wheel
MACHINERY HOUSE; CAB; EXTERIOR TRIM PARTS ANYWHERE
CAB, NAKED; CANOPY
General
TRIM PART, OUTSIDE; GLASS; SEALING MOULDING
Glass; sealing moulding
Rear window, sealing
Windscreen side pane, replacing and sealing
Windscreen, replacing and sealing
Windscreen, sealing
AIR CONDITIONING UNIT
General, common info about 872 – 877
Air distribution incl. air intake with filter
Cooling unit
Air conditioning, performance test
Electrical system, air conditioning, description of function
HYDRAULIC SYSTEM; DIGGING/ HANDLING/ GRADING EQUIPM.; MISC. EQUIP.
WORKING HYDRAULICS; SERVO HYDRAULICS
General, common info about 911 – 917
Hydraulic diagrams, working hydraulics
Working hydraulics
Shock and anti-cavitation valve
Pump, working hydraulics
Working pressure, checking and adjusting
Servo hydraulic system
Pressure back-up for servo circuit, accumulator checking
Servo pressure, checking and adjusting
(machine without separate attachment locking)
Servo pressure, checking and adjusting
(machine with separate attachment locking)
Servo pressure, checking at spool in control valve
Servo valve, description of function
Servo valve, operating controls, adjusting
Other hydraulic equipment
4th hydraulic function, description
Accumulator for Boom Suspension System, releasing pressure
Accumulator, Boom Suspension System, reconditioning
Accumulator, precharging pressure, checking and adjusting
Boom Suspension System, checking
Pressure-reducing valves R1 and R2,
closing pressure, checking
Releasing the hydraulic oil pressure in the accumulator
UNIT, LOAD HANDLING
Lifting frame work with mounting and link arm system
Boom kick-out and bucket positioner, adjusting
Lifting arm, replacing bearings at lower bucket or attachment mounting
Lifting cylinder, changing seals in machine
Lifting cylinder, replacing bushings (removed)
Lifting/tilting cylinder, (principle diagram)
Shock valve, lifting function, checking and adjusting
Shock valve, tilting function, checking and adjusting
Tilting cylinder, changing seals in machine
Tilting cylinder, replacing bearings (removed)