7900 VOVO Specs Handbrake, Streering Gear,Brake System, AC System

Buslovers Streering will membehas about gear, brake system, ac system on the buses volv 7900. for more details about 7900 CNG vovo following explanation.
Glazing Volvo 7900 CNG
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 glazing, bronze tinted apart 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 total 8 for 2+2+2 or 9 for 2+2+0 door layout).
Vehicle Structure Volv CNG
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.

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

Steering gear
Power steering of ball and nut type with builtin servo unit. Two inter-linked intermediate steering arms and individual link-rods to each side’s steering arm. Pitman arm connected to the relay arm via a link-rod. Steering wheel diameter ..450 or 500 mm
Optional………………………Steering wheel lock

Air and brake System
Separate circuits for front wheels, drive axle wheels, tag/pusher wheels. Park brake circuit acting on drive axle wheels. Volvo disc brakes combined with electronic braking system EBS 5,which controls ABS/ASR functions. Available features:brake blending, dual retarder control, drag torque control, hill startaid,brake temperature warning, poor brake performance warning, door brake, brake assistant, automatic diff lock, lining wear sensing and analysis, automatic calibration after brake pad change. System operating pressure 10.8bar Compressor capacity at 10 bar and engine spees 33 r/s (2000r/m) Compressor capacity at 10 bar and engine speed 33 r/s (2000 r/m)……………..16,5 dm3/s (1000 l/m)
Compressor ratio …………………………1.35:1

Ventilation, Haeting and AC System
Water heating system with 2-pipe convectors and blower heating for driver’s area, door1, pram area and door2 if fitted. Available ventilation units in roof channels with or without heating and roof air conditioning unit with heating + cooling. Driver’s cabin has convector or blower heating and can have own AC system with a timer. Door1 entrance can be heated by electrical mats in floor, preventing icing. A Multiplex 3 or 4-knob control panel enables manual or
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 depending on spec.
Additional heater heats the passenger compartment, defrosts the windscreen and preheats the engine. Available 7-day timer for programming the heater.
Additional heater capacity……………30 kW
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.
AC type ……………..Sutrak 136 type II or III
Cooling capacity type II …………..29,3 kW
Cooling capacity type III ………….33,7 kW
Heating capacity, type II/III…….42/46 kW
Weight, type II / III ……………165 / 210 kg
Roof mounted driver’ss AC unit …..3,5 kW

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