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Suspension and Steering

Exhaust and Cooling System
aid, brake temperature warning, poor brake Stainless steel exhaust system with SCR catalytic converter, AdBlue pump and 30 l urea tank. Catalytic converter is integrated with the silencer. On Board Diagnostics that alerts the driver if the level of air pollutants in the exhaust gases is excessive, and when AdBlue refilling is needed.
Optional……………………………………………DPF

Transmission
Volvo AT2412D I-Shift Automatic gearbox, 12 forward gears, 4 reverse, electronic control system. Electric motor as a retarder. 3-buttons gear selector.
Gear ratios: 14.94:1, 11.73:1, 9.04:1,
7.09:1, 5.54:1, 4.35:1, 3.44:1, 2.70:1,
2.08:1, 1.63:1, 1.27:1, 1.00:1. Reverse
gears: 17.48:1, 3.73:1, 4.02:1, 3.16:1.

Rear Axle and Tyres
Rear axle
ZF single reduction portal axle AV132 with low offset 80° input from the engine via the propeller shaft. Max speed km/h at 2200 rpm with tyre 275/70R22.5:
Ratio:……………………………………………4.72:1
AT2412D …………………………………………..80
The maximum speed on the highest gear
is restricted.

Tyres & Rims
10-stud steel or aluminium disc wheels.
Chrome or zinc wheelnut protector ring.
Dual driving axle wheels.
Rims………………………………………………..Tyres
7.5”x22.5”……………………..275/70R22.5”

Suspension and Steering
Electronically Controlled Suspension (ECS2), rigid low front axle. Stabilizer both front and rear. Double-acting, hydraulic telescopic shock absorbers, two in front, two at rear. Full front kneeling. Kneeling interrupt
configuration (stop or return).
Numbers………………………Front…………Rear
Air bellows ………………2…………………..4
Levelling sensors ……. 1…………………..2

Steering gear
Power steering of ball and nut type with built-in servo unit. Approx. 4.5 turns of wheel from lock to lock. Left steering wheel position. Steering wheel feed knob.
Steering wheel diameter.450 or 500 mm
Optional…………………..Steering wheel lock

Air and brake System
Separate circuits for front and rear wheels. Volvo disc brakes combined with electronic braking system. EBS5 medium package.
Available features: ABS, TC, lining wear sensing, analysis and warning, brake blending, drag torque control, differential lock
synchro, automatic differential lock, hill start and brake temperature warning,poor brake performance warning, brake assistant,
doorbrake, EBS status recorder.
System operating pressure ….8.5 kp/cm2

Electric air compressor

The compressor is of rotary type and air cooled, driven by electric motor independently from diesel engine with power supplied by
DC/DC converter.
Voltage…………………………………………..600 V
Frequency………………………………………50 Hz
Drive ratio motor:compressor…………….1:1

Cut-out pressure……………………….12,0 bar
Compressor capacity at 10 bar and
engine speed 33 r/s (2000 r/m)
…………………………………………………920 l/min
Compressor ratio……………………….1.116:1

Air tanks standard
– Primary…………..1x25dm3 + 2×30 dm3 (l)
– Front circuit…………………………..30 dm3 (l)
– Rear circuit……………………………30 dm3 (l)
– Park circuit…………………………….15 dm3 (l)
– Purge tank……………………………….6 dm3 (l)
Compressed air system can easily be filled
from external circuit.

Handbrake
Air operated spring brake acting directly on the drive axle wheels. Application is infinitely variable by means of a control on the fascia.

Glazing
Glued one-piece panoramic wind screen, clear or green tinted, side windows with single or double glazing tinted, rear window
with single glazing tinted only. All other glazing, bronze tinted aprt from drivers window which is clear only. Driver’s side double
glazed window manually operated; without electric heating or single glazing with heating. Available 4 or all hopper windows (in to-
tal 8 for 2+2+2 or 9 for 2+2+0 door layout).

Exterior
Front and rear walls made from fibre glass and ABS elements. External side panelling are made of a single sheet of aluminium
under the window line combined with glass fibre plates and is finished of with a aluminum lower skirt for the sides. Hatches are made of the same glass fibre panelling. Wheel arches of DCPD. Roof made of 1 mm
thick single-piece aluminium sheet, glued to the roof frame. Mekra or Wilke external mirrors. Electrically adjusted, heated or not. 3-piece bumpers. Top hinged service compartment hatches with snap or cylinder locks. Mounted outside wide angle mirror on the RHS, flagholder. Available: school bus equipment, warning signalization when front hatch open, head lamp cleaner, exit light above door2, high rear direction indicator. 1 or 2 roof hatches, electrically or manually operated; with emergency exit mechanisms.
==

Doors and Door System
ISAF double doors inward gliding on all positions pneumatically powered with single bronze tinted glazing. Door operation available in a range of combinations.
Control via button/joystick or both with various safety function combinations for door operation available. Can be fitted with
8 mm square male or key cylinder locks for door1 locked from inside or outside.
Door configurations ………2+2+2; 2+2+0
Door buttons for driver right hand operated.
External emergency valves at all doors.
Mechanical or electrical access ramp at
second door.

Ventilation and Heating and AC Systems
Water heating system with 2-pipe convectors and blower heating for driver’s area, door1, pram area and door2 if fitted. Roof air conditioning units with heating + cooling. Driver’s cabin has convector or blower heating and can have own AC system. Door1 entrance can be heated by electrical mats in floor, preventing
icing. A Multiplex 3-knob control panel enables automatic setting of the climate parameters in the bus. External temp. meter installed and optional interior temp. meter.
Convector heating:
Output………………………………………551W/m
Weight……………………………………….3.1kg/m
Blower heating for driver’s area, door1,
pram area and door2: data per blower
Output ………………………………………..2.8 kW
Air flow …………………………………..156 m3/h
Weight ………………………………………….2.7 kg
Total power output from convektors and
blowers………..2.1 to 3.4kW dependingon spec.
Additional heater heats the passengercompartment, defrosts the windscreen and preheats the engine. Available 7-day timer for programming the heater.
Additional heater capacity……………30 kW
Fuel consumption ………………………4,0kg/h
Additional heater fuel tank………………….40l
Defroster:
Air flow, min/max ….446 m3/h / 731 m3/h
Heat output, min/max ………..7 kW/15 kW
Air Conditioning system for cooling and
heating the passengers compartment:
Spheros Citysphere AC units (2 pcs,equivalent with conventional 24kW system).Semi-hermetic compressor, gearless drive by electric motor (engine rev independent).
Constant maximal refrigerating capacity,air distribution direct into passenger’s compartment through outblow duct.
Roof mounted driver’s AC unit …..3,5 kW

Vehicle Structure
The body is based on the patented Volvo Bus concept, where an aluminium alloy providing superior corrosion resistance is
used. The structure is made of extruded aluminium profile. Chassis floor structure built-up by steel RHS-profiles, welded together with open c-profile cross-members. The combined aluminium and steel frame
combines good stability with low weight and gives long service life and increased loading capabilities. Rigidity provides good stability and driving.

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