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11. COOLING SYSTEM (a) Radiator shall be a heavy-duty type with bolted, top and bottom tanks and inlet and outlet fittings. Bottom tank shall be equipped with an easily accessible drain cock. (b) Surge tank shall be a two (2) gallon minimum capacity equipped with low coolant probe, sight glass, manual pressure relief valve, automatic pressure relief valve, and a hinged filler cap assembly. (c) All radiator hoses shall be made of silicone rubber installed with stainless steel worm-type constant tension hose clamps. (d) The cooling system shall be filled from the outside of the vehicle. The power steering pump and the air compressor shall be engine gear driven. Engine air shall enter through a screen filter located for maximum
protection. Location shall not permit entrance of rain or water from
modern bus washing equipment. (a) The chassis shall be equipped with a 3" diameter exhaust and 4" diameter tailpipe eliminating undue back pressure mounted outside of the right side chassis frame rail. The exhaust pipe has a direct flow into a aluminized muffler. (b) The exhaust system shall terminate on the rear streetside of the trolley and shall meet Federal and State regulations for exterior noise level. (a) The 12 volt system shall be serviced by one (1) 200 AMP 12 volt air cooled type alternator driven by a Serpentine belt from the engine accessory drive. The air conditioner shall be Poly V-belt driven from the engine accessory drive. (b) Two (2) 8D batteries with end-mounted top terminals shall be mounted in a slide-out stainless steel drawer located on the streetside of the chassis. (c) A separate compartment on the streetside of the coach, shall be equipped with a rotary type master disconnect switch. (d) Battery cables shall be 4/0 vinyl covered, sleeved with flex guard loom. (e) All wiring, including cables, shall be primary type with stake-on terminals, sleeved with loom. Circuits shall be 12 volt DC negative ground. (f) The electrical system shall be designed and installed as sectional harnesses with quick-disconnect, multi-pin connectors, properly supported with insulated clamps. (g) Wiring harnesses shall be installed in flex loom in the interior walls of the body. (h) All multi-pin connectors with four (4) or more conductors shall be twist-lock circular type connectors. (i) All multi-pin connectors exposed to the exterior elements shall be environmentally sealed metal connectors. (j) All interior multi-pin connectors shall be high impact resistant plastic connectors. (k) All connectors with three (3) or less conductors shall be environmentally sealed rubber pull-a-part connectors. (l) A driver controlled redundant flasher shall be incorporated in the electrical system. (m) All harnesses, terminals, plugs, fuses, and components shall be easily accessible. All circuit protection shall be accomplished by the use of manual reset circuit breakers except for safety functions which shall utilize automatic reset breakers. (n) All chassis wiring harnesses shall be installed with insulated clamps and routed so as to facilitate accessibility and service. (o) All wiring and junction panel terminals shall be numbered or color coded for easy location. Complete diagrams showing coding will be furnished by contractor. (p) All circuit breakers shall be readily accessible. (q) The starter motor shall be a 12 volt DC motor operated by a solenoid controlled by a start switch on the driver's control panel interlocked so as not to be functional with engine running. Starter will start engine in temperatures as low as 10 degrees F. 16. ACCELERATOR CONTROL SYSTEM (a) A full air control system shall be used incorporating two individual return springs capable of returning the accelerator controls to the idle position. (b) The accelerator system shall also be interlocked with doors by means of a solenoid air valve holding the accelerator control to the idle position. (a) Shall be a direct drive, fully automatic, six speed, B-300 electronic transmission. The 5th and 6th speed will be locked out unless they are necessary for customer's application. (b) The oil pan shall be equipped with a heat exchanger mounted on the frame rails close to the radiator. The heat exchanger lines shall be of high pressure hydraulic hose with reusable fittings, equipped with an exterior spin on type oil filter. A transmission fill tube and dip stick shall be accessible from outside the coach. Transmission controls shall be located to the left-hand side of the driver, and shall meet all Federal Motor Vehicle Safety Standards. (a) The location for checking and adding fluids, or making adjustments to key components and systems, shall be located at the rearward most point of the chassis, accessible through the service doors. (b) This location shall provide for exterior maintenance and service of engine coolant, engine oil check, and addition of oil, transmission check and addition of fluid, power steering reservoir check and addition of fluid, and air governor adjustment with Schraeder valve for shop air service. Windshield washer fluid will be added through the front grille access panel.
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