Overview
The Volvo A20C Articulated Dump Truck Service Repair Manual is a system-by-system reference for maintenance, inspection and repair work. Its service groups address braking equipment, steering components, working and servo hydraulics, and electrical and instrument systems.
Component-level coverage extends to fuel injection timing references, engine oil-pressure checks, dry-brake components, parking-brake components, and transfer gearbox components.
Table of Contents
Volvo A20C Manual
-
01. General
- Specifications — Volvo standard tightening torques
- Standard Time
- Tool — Below are drawings of the E-tools that can be made in your own workshop.
-
02. Standard Parts, Service
- Lubricant; Fuel; Other Fluid — Brake system, changing brake fluid
- Service — General, common info about 171 – 179 — Electric welding
- Service — Emergency measures
-
03. Engine with Mounting and Equipment
- Engine — General, common info about 211 – 218 — Compression check, engine at operating temperature
- Engine — General, common info about 211 – 218 — Specifications, general
- Engine — Cylinder head — Specifications, tightening torques
- Engine — Cylinder block with crankcase ventilation
- Engine — Valve mechanism — Valves, adjusting
- Engine transmission; camshaft
- Engine — Crank shaft; connecting rod; vibration damper; fly wheel
- Engine — Oil sump, dipstick incl.
- Engine mounting
- Lubricating System — General, common info about 221 – 224
- Lubricating System — Oil pump; line — Lubrication oil pressure, checking
- Fuel System — General (common info about 233 – 238) — Low emission engines
- Fuel System — Fuel pump; filter; strainer — Fuel feed pump, checking feed pressure
- Fuel System — Fuel tank; fuel filling pump — Specifications, capacities
- Fuel System — Injection pump; regulator; pump companion — Fuel injection pump, changing incl. setting injection timing
- Fuel System — Injection pump; regulator; pump companion — Idle speed, checking and adjusting
- Fuel System — Injection pump; regulator; pump companion — Injection angle TDC, checking and adjusting
- Fuel System — Injection pump; regulator; pump companion — Slow and fast idle speed, checking and adjusting with service display unit
- Fuel System — Injection pump; regulator; pump companion — Stall speed, checking with service display unit
- Fuel System — Injector; delivery pipe — Injectors, changing all
- Fuel System — Control system; control unit (for ex. injection timing adjuster) — Automatic timing adjuster, checking
- Fuel System — Control system; control unit (for ex. injection timing adjuster) — Automatic timing adjuster (alpha adjuster)
- Inlet System; Exhaust System — Inlet manifold; exhaust manifold
- Inlet System; Exhaust System — Turbo charger
- Inlet System; Exhaust System — Air cleaner with connections; air pre-heater
- Cooling System — General, common info about 261 – 269
- Cooling System — Radiator, mounting and connections included — Coolant, changing
- Cooling System — Fan; fan shroud; fan coupling — Hydraulic motor for fan or hydraulic pump, checking internal leakage
- Cooling System — Fan; fan shroud; fan coupling — Radiator fan drive, checking function of motor
- Cooling System — Fan; fan shroud; fan coupling — Radiator fan drive, general description
- Engine Control — Revs control, foot operated — Throttle pedal, anti-throttle cylinder, adjusting
-
04. Elec. System; Warning System; Information System; Instruments
- Comprehensive info, electrical system
- Battery; Energy Storage System; Mounting Parts — Battery
- Alternator; Charging; Electric Motor; Electric Drives — Alternator inclusive drive
- Alternator; Charging; Electric Motor; Electric Drives — Charging; converter
- Starting System — Starter motor inclusive solenoid
- Lighting — General, common info about 351 – 356
- Lighting, front, including parking light and day running light
- Cable; Fuse; Relay — General, common info about 371 – 379
- Cable; Fuse; Relay — Cable; battery disconnector
- Cable; Fuse; Relay — Electrical distribution box; fuse box; junction box
- Instrument; Sensor; Warning and Information System — General, common info about 383 – 387
- Instrument; Sensor; Warning and Information System — Speedometer; trip meter; hour counter
- Instrument; Sensor; Warning and Information System — Sender, monitoring system
- Instrument; Sensor; Warning and Information System — Warning/information unit, display unit
-
05. Power Transmission
- General, common info about 410 – 436
- Clutch; Torque Converter — Hydrodynamic coupling, torque converter
- Transmission, Hydraulic Control — Hydraulic diagram, transmission without retarder
- Transmission, Hydraulic Control — Transmission functions, checking instructions for connector X1/A1
- Transmission, Hydraulic Control — Transmission PT1051 – cut-away drawing
- Transmission, Hydraulic Control — Transmission PT1052, general description
- Transmission, Hydraulic Control — Transmission, general troubleshooting
- Transmission, Hydraulic Control — Troubleshooting outside the control unit in connector X1/A1
- Transmission, Hydraulic Control — Wiring diagram, transmission electronics, circuit 37a-I
- Transmission, hydraulic control — Diagnosis using error codes on service display unit
- Transmission, hydraulic control — Gearshift selector, checking
- Transmission, hydraulic control — Hydraulic transmission, checking oil pressure
- Transmission, hydraulic control — Inductive sensor for output shaft, changing
- Transmission, hydraulic control — Inductive sensor for turbine speed, changing
- Transmission, hydraulic control — Oil cooler, changing
- Transmission, hydraulic control — Seal for rear output shaft, changing
- Transmission, hydraulic control — Solenoids, checking resistance
- Transmission, hydraulic control — Transmission, removing and mounting (engine removed from machine)
- Transmission, hydraulic control — Transmission, removing and mounting (together with engine)
- Gearbox — Distributing gearbox — Dropbox FL 650 D, general description
- Gearbox — Distributing gearbox — Dropbox, changing seal for rear output shaft
- Gearbox — Distributing gearbox — Dropbox, changing seal for front output shaft
- Gearbox — Distributing gearbox — Longitudinal differential lock, adjusting engagement
- Propeller Shaft — General, common info about 451 – 453
- Propeller shaft, complete — Intermediate propeller shaft and/or bearing, changing (in frame joint)
- Propeller shaft, complete — Propeller shaft between dropbox and frame joint, changing
- Propeller shaft, complete — Propeller shaft between transmission and dropbox, changing
- Propeller shaft, complete — Propeller shaft for rear bogie axle, changing
- Propeller shaft, complete — Propeller shaft, front output shaft on dropbox, changing
- Propeller shaft, complete — Propeller shaft for front bogie axle, changing
- Front Axle; Rear Axle — General, common info about 461 – 468 — Dog clutch 66, checking and adjusting
- Front Axle; Rear Axle — General, common info about 461 – 468 — Final drive 66 output shaft, changing seals and bearings
- Front Axle; Rear Axle — Front axle assembly, removing
- Front Axle; Rear Axle — Differential lock, with control — Transverse differential lock, adjusting engagement (per axle)
- Power take off
- Power take off, between engine and gearbox (ART) — Flywheel housing (rear engine transmission) and power take-off
- Power take off, between engine and gearbox (ART) — Power take-off in flywheel housing, reconditioning
- Power take off, between engine and gearbox (ART) — Power take-off in flywheel housing, changing
-
06. Brake
- Comprehensive info about brakes
- Wheel Brake — General, common info about 511 – 519 — Brake pads for service brake, checking
- Wheel Brake — General, common info about 511 – 519 — Specifications, weights
- Wheel Brake — Front wheel brake, dry brake — Brake caliper, changing (per caliper)
- Wheel Brake — Front wheel brake, dry brake — Brake disc, changing
- Hydraulic Brake System — General, common info about 520 – 522 — Brake system, bleeding
- Hydraulic Brake System — Brake valve
- Parking Brake — General, common info about 551 – 554 — Parking brake caliper removed, reconditioning
- Parking Brake — General, common info about 551 – 554 — Parking brake valve – hand-operated lever
- Parking Brake — General, common info about 551 – 554 — Parking brake valve, reconditioning
- Parking Brake — General, common info about 551 – 554 — Parking brake, changing brake caliper
- Parking Brake — General, common info about 551 – 554 — Parking brake, changing brake disc
- Parking Brake — General, common info about 551 – 554 — Parking brake, changing brake pads
- Parking Brake — General, common info about 551 – 554 — Spring brake cylinder removed, reconditioning
- Parking Brake — Propeller shaft brake
- Compressed-air Brake — General, common info about 561 – 565 — Four-way pressure retaining valve, reconditioning (removed)
- Compressed-air Brake — Compressor; regulator; antifreeze unit — Cut-out and cut-in pressures, checking and adjusting
- Compressed-air Brake — Compressed-air tank, with mounting
- Compressed-air Brake — Valves, compressed-air
- Miscellaneous — General, common info about 591 – 594 — Compressed air diagram A20C
-
07. Steering
- Comprehensive info, steering
- General, common info about 641 – 647 — Pressure accumulation, engine dependent pumps 1 and 2
- Steering gear, checking and adjusting
- Steering gear, changing
- Steering arm; steering linkage; track rod — Steering linkage, changing roller bearings in rear lever
- Steering arm; steering linkage; track rod — Steering linkage, changing roller bearing in front lever
- Steering arm; steering linkage; track rod — Steering linkage, checking and adjusting
- Hydraulic equipment — Damping cylinder, removing and mounting
- Hydraulic equipment — Damping cylinder, changing seals
- Hydraulic equipment — Damping cylinder, checking pre-load
- Hydraulic equipment — Steering cylinder bearing, checking
- Hydraulic equipment — Steering cylinder, changing spherical bearing
- Hydraulic equipment — Steering cylinder, reconditioning in machine (left steering cylinder)
- Hydraulic equipment — Steering valve removed, reconditioning
- Hydraulic equipment — Steering valve, changing
- Hydraulic equipment — Steering cylinder, changing
- Hydraulic equipment — Steering system, checking and adjusting operating pressure
- Hydraulic equipment — Steering valve neutral position and valve slide axial clearance, checking
- Steering damper
-
08. Frame; Springs; Damping; Axle Suspension; Wheel/track Unit
- Frame, complete — Load unit frame, checking dimensions
- Suspension — General, common info about 725 – 727
- Suspension — Hollow rubber spring, bump stop — Front rubber springs, changing all
- Frame Link — Bearings — Frame joint, checking and adjusting clearance
- Frame Link — Bearings — Frame joint, changing metallic bearing
- Frame Link — Bearings — Steering joint and frame joint
- Frame link grader — Frame joint, changing hitch
- Frame link grader — Steering joint, changing spherical bearings
- Axle Suspension — Suspension, front axle — Front A-stay link bearing (rubber bearing), changing
- Axle Suspension — Movable member system, front/rear — Front or rear bogie axle torsion bar, adjusting
- Axle Suspension — Movable member system, front/rear — Front axle, changing link bearing (rubber bearing)
- Axle Suspension — Bogie suspension — Bogie beam, changing rubber springs
- Axle Suspension — Bogie suspension — Torsion bar and/or link bearing, changing on load unit
- Axle Suspension — Bogie suspension — Torsion bar, checking and adjusting
- Wheels; Tracks; Tyre; Hub; Drum — Wheel
-
09. Machinery House; Cab; Exterior Trim Parts Anywhere
- Cab, Naked; Canopy
- Trim Part, Outside; Glass; Sealing Moulding — Glass; sealing moulding — Window pane, changing
- Cab Interior/upholstery — Driver’s seat, complete; instructor’s seat — Air spring for operator’s seat, changing
- Cab Interior/upholstery — Driver’s seat, complete; instructor’s seat — Operator’s seat, adjusting height of attachment
- Cab Interior/upholstery — Driver’s seat, complete; instructor’s seat — Operator’s seat, mechanical suspension
- Air Conditioning Unit — Air distribution incl. air intake with filter
- Air Conditioning Unit — Heating unit — Heater, changing
- Air Conditioning Unit — Cooling unit — Filling refrigerant R134a
-
10. Hydraulic System; Digging/ Handling/ Grading Equipm.; Misc. Equip.
- Working Hydraulics; Servo Hydraulics — General, common info about 911 – 917 — Hydraulic system and component positions
- Working Hydraulics; Servo Hydraulics — General, common info about 911 – 917 — Hydraulic system, bleeding air
- Working Hydraulics; Servo Hydraulics — Tank; line; oil cooling; filter; breather; filling pump
- Working Hydraulics; Servo Hydraulics — Working hydraulics
- Working Hydraulics; Servo Hydraulics — Pump, working hydraulics — Oil pump, changing ground-dependent pump
- Working Hydraulics; Servo Hydraulics — Pump, working hydraulics — Oil pump, checking and adjusting hold (standby) pressure
- Load Carrier — Hauler/platform body, incl. tipping cylinder; heating; tail gate — Installing piston rod seals
- Load Carrier — Hauler/platform body, incl. tipping cylinder; heating; tail gate — Load body position indicator, adjusting
- Load Carrier — Hauler/platform body, incl. tipping cylinder; heating; tail gate — Load body, adjusting against frame
- Load Carrier — Hauler/platform body, incl. tipping cylinder; heating; tail gate — Load body, changing tipping bearings
- Load Carrier — Hauler/platform body, incl. tipping cylinder; heating; tail gate — Tipping cylinder, changing
- Load Carrier — Hauler/platform body, incl. tipping cylinder; heating; tail gate — Tipping valve, changing
- Load Carrier — Hauler/platform body, incl. tipping cylinder; heating; tail gate — Tipping valve, changing cable
- Load Carrier — Hauler/platform body, incl. tipping cylinder; heating; tail gate — Tipping lever, adjusting
- General, common info about 992 – 996
Transmission Unit Identification, Differential Lock and Propeller Shaft
The transmission-related entries name PT1051, PT1052, and FL 650 D. 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.
Reviews
There are no reviews yet.