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screens packaged in a heavy duty galvanized steel frame. This multilayered screen shall trap embers <br />and allow them to burn out before passing through the pack. <br />The engine air intake system shall also include an air cleaner mounted above the radiator. This air <br />cleaner shall utilize a replaceable dry type filter element designed to prevent dust and debris from being <br />ingested into the engine. A service cover shall be provided on the housing, reducing the chance of <br />contaminating the air intake system during air filter service. <br />The air intake system shall include a restriction indicator light in the warning light cluster on the <br />instrument panel, which shall activate when the air cleaner element requires replacement. <br />ENGINE FAN DRIVE <br />The engine cooling system fan shall incorporate a thermostatically controlled, Horton fully variable type <br />fan drive with SmartClutch J-1939 CAN controller. The clutch fan shall override the thermostatic <br />variable speed and function as full on automatically in pump mode. <br />The variable speed fan clutch only engages at the amount needed for proper cooling to facilitate <br />improved vehicle performance, cab heating in cold climates, and fuel economy. The fan clutch design <br />shall be fail-safe so that if the clutch drive fails the fan shall engage to prevent engine overheating due to <br />the fan clutch failure. The fan speed shall include a J-1939 CAN clutch controller to receive signal from <br />the engine control module to activate at variable rates of speed. Variable speeds shall be set through <br />thermostatic and engine speed signals to run as efficiently and quietly as required to maintain <br />temperature. <br />ENGINE COOLING SYSTEM <br />There shall be a heavy-duty aluminum cooling system designed to meet the demands of the emergency <br />response industry. The cooling system shall have the capacity to keep the engine properly cooled under <br />all conditions of road and pumping operations. The cooling system shall be designed and tested to meet <br />or exceed the requirements specified by the engine and transmission manufacturer and all EPA <br />requirements. The complete cooling system shall be mounted to isolate the entire system from <br />vibration or stress. The individual cores of the cooling system shall be mounted in a manner to allow <br />expansion and contraction at various rates without inducing stress into the adjoining cores. <br />The cooling system shall be comprised of a charge air cooler to radiator serial flow package that <br />provides the maximum cooling capacity for the specified engine as well as serviceability. The main <br />components shall include a surge tank, a charge air cooler bolted to the front of the radiator, <br />recirculation shields, a shroud, a fan, and required tubing. <br />The radiator shall be a down -flow design constructed with aluminum cores, plastic end tanks, and a steel <br />frame. The radiator shall be equipped with a drain cock to drain the coolant for serviceability. <br />The cooling system shall include a one piece injected molded polymer fan with a three (3) piece <br />fiberglass fan shroud. <br />The cooling system shall be equipped with a surge tank that is capable of removing entrained air from <br />the system. The surge tank shall be equipped with a low coolant probe and rearward oriented sight glass <br />to observe coolant in the system. A cold fill and observation line shall be included within the frame <br />mounted translucent recovery bottle to monitor the level of the coolant. The surge tank shall have a dual <br />