VOLVO ARTICULATED HAULER A20C
• Engine output SAE J1349:
Net 170 kW (228 hp)
Gross 173 kW (232 hp)
• Body volume:
12 m3 (15,7 yd3)
• Load capacity:
20 t (22 sh tn)
• Volvo low emission directinjected,
turbocharged, intercooled
high performance diesel
engine.
• Fully automatic powershift
transmission, electronically
controlled.
• Drop box with longitudinal
differential lock.
• 100% lock-up differential
locks. One longitudinal and
three transverse diff locks.
• Front axle with three-point
suspension and effective
shock absorption.
• Volvo terrain bogie, individually
oscillating axles and high
ground clearence.
• Load and dump brake
• Low interior noise level.
• Adjustable steering wheel.
ENGINE
Volvo 6-cylinder, in-line, turbocharged, direct-injected, intercooled, 4-cycle low emission diesel engine with overhead valves and wet replaceable cylinder linings. Meets 88/77/EEC and California off-road regulation 1996. Fan: Hydrostatic driven, thermostatically controlled radiator fan consuming power only when needed.
| Make | Volvo |
| Model | TD73 KFE |
| Max power at | 40 r/s (2400 r/min) |
| SAE J1349 Gross 173 kW (232 hp)
Flywheel power at |
40 r/s (2400 r/min) |
| SAE J1349 Net | 170 kW (228 hp) |
| DIN 6271* | 170 kW (228 hp) |
| Max torque at | 20 r/s (1200 r/min) |
| SAE J1349 Gross | 920 Nm (677 lbf ft) |
| SAE J1349 Net | 910 Nm (670 lbf ft) |
| DIN 6271 ** | 910 Nm (670 lbf ft) |
| Displacement total | 6,73 l (411 in3) |
| Bore | 105 mm (4.1 in) |
| Stroke. | 130 mm (5.1 in) |
| Compression ratio | 17,7:1 |
*) with fan at normal speed. With fan at full speed the
flywheel power is 155 kW (208 hp) corresponding to DIN
70020.
**) with fan at normal speed. With fan at full speed the
max torque is 810 Nm (596 lbf ft) corresponding to DIN
70020.
ELECTRICAL SYSTEM
| Voltage | 24 V |
| Battery capacity | 2x135 Ah |
| Alternator | 1,65 kW (60 A) |
| Starter motor | 5 kW (6.7 hp) |
SERVICE CAPACITIES
| Crankcase | 24 l (6.3 US gal) |
| Fuel tank | 280 l (74.0 US gal) |
| Cooling system | 35 l (9.2 US gal) |
| Transmission total . | 16 l (4.2 US gal) |
| Drop box | 6 l (1.6 US gal) |
| Front axle | 27 l (7.1 US gal) |
| First bogie axle. | 28 l (7.4 US gal) |
| Second bogie axle | 27 l (7.1 US gal) |
| Brake hydraulics | 2 l (0.5 US gal) |
| Hydraulic system | 180 l (47.6 US gal) |
| Hydraulic tank | 155 l (41 US gal) |
DRIVETRAIN
Torque converter: Single stage with free wheeling stator and automatic lock-up in all gears. Transmission: Electronically controlled, fully automatic planetary transmission with 5 gears forward and 1 in reverse. Drop box: Volvo single stage design with power take-off and differential with lock-up function. Axles: Volvo 6-wheel drive. All axles have transversal difflocks with 100% lock-up and fully floating axle shafts with planetary type hub reductions. Differential locks: One longitudinal and three transverse. All with 100% lock-up.
| Torque converter | 2,43:1 |
| Transmission | Volvo PT 1052 (5HP 500) |
| Drop box | Volvo FL 650D |
| Axles | Volvo AH 54 |
| Speeds with tires 20.5R25 | |
| Forward | |
| 1 | 9 km/h (5.6 mile/h) |
| 2 | 15 km/h (9.3 mile/h) |
| 3 | 25 km/h (15.5 mile/h) |
| 4 | 35 km/h (21.7 mile/h) |
| 5 | 47 km/h (29.2 mile/h) |
| Reverse
1 |
10 km/h (6.2 mile/h) |
SUSPENSION
Volvo suspension system. Totally maintenance-free. Front axle: Two rubber springs with bottoming absorption on each side. Stabilizer. Two shock absorbers on each side. The front axle is suspended at three points, which results in oscillating needed in rough terrain. Bogie: Volvo's unique terrain bogie, which permits individual oscillation between the axles.
BRAKE SYSTEM
Dual circuit system with air-hydraulic disc brakes. Comply with ISO 3450 and SAE J1473 at total machine weight. Circuit Division: One circuit for front axle and one for bogie axles. Parking brake: Spring-applied, air-released disc brake on the propeller shaft, designed to hold a loaded machine on a grade up to 18%. When the parking brake is applied, the longitudinal differential is locked. Load and dump brake: With the engine running, the service brake on the bogie axles is applied together with the parking brake.Compressor: Gear-driven by engine transmission. Exhaust brake: Standard. For retarding capability incl. exhaust brake and engine, see graph on page 4.
HYDRAULIC SYSTEM
Pumps: Three engine-dependent, variable piston pumps mounted on flywheel power take-offs. One unused power take-off available. Ground-dependent hydraulic pump for supplementary steering mounted on the drop box. Filtration: Through two paper filters with magnetic cores.
| Pump capacity per pump
at shaft speed |
34 r/s (2040 r/min) |
| engine dependent | 100 l/min (26.4 US gpm) |
| ground dependent | 118 l/min (31.2 US gpm) |
| Working pressure | 19,5 MPa (2830 psi) |
CAB
Volvo cab, tested and approved according to ROPS standard
ISO/3471 and SAE J1040/APR88.
Mounted on rubber pads which effectively reduce vibrations.
Adjustable steering wheel.
Radio/ Contronic console in ceiling.
Heater and defroster: Filtered air and pressurized cab.
Three speed fan.
Operator's seat: Ergonomically designed and adjustable
operator´s seat with flameproof upholstery. Retractable seat
belt.
Trainer seat: Option.
| Number of exits | 2 |
| Internal sound level,
according to ISO 6394 and at max speed |
78 dB (A) |
STEERING SYSTEM
Hydromechanical articulated steering with mechanical feedback. 3,4 turns lock-to-lock. Cylinders: Two double-acting steering cylinders. Supplementary steering: Complies with ISO 5010 standard at total machine weight. Steering angle: ± 45°
BODY
Body: Hardened and tempered steel body with high impact strength. Cylinder: One single-acting 5-stage hoist cylinder with automatic tipping stop.
| Tipping angle | 63° |
| Tipping time with load | 15 s |
| Lowering time | 15 s |
| Body, plate thickness
Sides |
10 mm (0.39 in) |
| Bottom/chute | 10 mm (0.39 in) |
| Front | 10 mm (0.39 in) |
| Yield strength | 1000 N/mm2 (145000 psi) |
| Tensile strength | 1250 N/mm2 (181000 psi) |
| Hardness min. | 360–440 HB |
WEIGHTS
Operating weight includes all fluids and operator. Standard machine.
| Operating weight with tires 20.5R25 | |
| Front | 8700 kg (19180 lb) |
| Rear | 7700 kg (16975 lb) |
| Total | 16400 kg (36155 lb) |
| Payload | 20000 kg (44092 lb) |
| Total weight | |
| Front | 10900 kg (24030 lb) |
| Rear | 25500 kg (56217 lb) |
| Total | 36400 kg (80247 lb) |
A20C equipped with 25/65R25 tires, add 200 kg (440 lb) per axle.
INSTRUCTIONS
Diagonal lines represent total resistance (grade % plus rolling resistance %).
Charts based on 0% rolling resistance, standard tyres and gearing, unless otherwise stated.
In the retardation chart the diagonal lines represent the "total resistance" as well (here in downhill grades it is
the total extra pushing force), which is the grade in % minus the rolling resistance in %.
A. Find the diagonal line with the appropriate total resistance on the right-hand edge of the chart.
B. Follow the diagonal line downward until it intersects the actual machine weight line, NMW or GMW.
C. Draw a new line horizontally to the left from the point of intersection until the new line intersects the rimpull
or retardation curve.
D. Read down for vehicle speed.
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