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Extreme Cold Weather System

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Extreme Cold Weather System Flow SLPR HTR CORE (IN) APU RADIATOR SLPR HTR CORE (OUT) ENGINE COOLANT HOSES TO CAB/SLPR HTR ¾” RADIATOR SURGE TANK BTM WATER PUMP MANEX HTR CORE TOP APU TRK RADIATOR ¾” COOLANT IN 5/8” CAB HTR 5/8” ENGINE THERM HOUSING CAB HTR CORE (IN) CAB HTR CORE (OUT) ENGINE WATER PUMP SLPR HTR 5/8” COOLANT IN 5/8” Hose Fittings Direction of Coolant Flow Valve (VLV) Tee Existing Hose Connections Plugged Port For Heating – Valve A Closed; Valve B & C Open For Air Conditioning – Valve A Open; Valves B & C Closed All items in blue are installed items. All items in grey are part of the truck’s structure. 3/4" and 5/8” hoses are indicated in black. Hoses pictured above do not show the proper installation, and is provided solely as an overview of connections. Refer to your installation manual for specific instructions or contact WPS. Doc: FD 001-002 Rev-A