DRIVER 1335209 - Caterpillar

Coolant Flow
Illustration 1 g00423398
Cooling System Schematic (1) Temperature regulator housing (2) Radiator (3) Bypass tube (4) Water pump (5) Engine oil cooler (6) Return manifold (7) Supply manifold in the block (8) Cylinder head (9) Cylinder linerThe water pump is driven by a gear. The water pump is located on the right hand side of the engine. The water pump supplies the coolant for the engine cooling system. The coolant is supplied to the following components:
Engine oil cooler (5)
Cylinder head (8)
Cylinder liner (9)
Air compressor (not shown)
Coolant conditioner element (not shown)Note: In air-to-air aftercooled systems, a coolant mixture with a minimum of 30 percent ethylene glycol base antifreeze must be used for efficient water pump performance. This mixture keeps the cavitation temperature range of the coolant high enough for efficient performance.
Illustration 2 g00423399
Typical right side of engine (1) Temperature regulator housing (4) Water pump (5) Engine oil cooler
Illustration 3 g00423400
Typical rear of engine (6) Return manifold
Illustration 4 g00543009
Right side engineCoolant from engine oil cooler to the supply manifold (7) The water pump (4) pulls the antifreeze coolant solution from the bottom of radiator (2). The rotation of the water pump's impeller creates coolant flow within the cooling system. The water pump is located on the right hand side of the front timing gear housing.The water pump impeller is rotated at 1.17 times the engine speed by an idler gear. The idler gear is turned by the crankshaft gear. The water pump shaft is supported by two ball bearings. One ball bearing is located in the water pump housing. The other ball bearing is located in the front timing gear housing. The water pump impeller face is open. The impeller vane is radial. The impeller is made out of cast iron. The rear cover is made out of aluminum. The rear cover is a die casting. The water pump seal is a cartridge seal. The water pump seal is located on the inlet side of the pump in order to provide good water flow around the seal for cooling. The antifreeze coolant solution is pumped through the engine oil cooler (5). The antifreeze coolant solution then goes into the supply manifold (7). The supply manifold is located in the cylinder block. The supply manifold distributes the antifreeze coolant solution at each cylinder. The antifreeze coolant solution then flows around the upper portion of the cylinder liner. The antifreeze coolant solution cools the upper portion of the cylinder liner. At each cylinder, the antifreeze coolant solution flows from the cylinder liner to the cylinder head. The cylinder head is divided into single cylinder cooling sections. In the cylinder head, the antifreeze coolant solution flows across the center of the cylinder and across the injector seat boss. At the center of the cylinder, the antifreeze coolant solution flows around the injector sleeve over the exhaust port. The antifreeze coolant solution then exits into the return manifold (6). The return manifold collects the antifreeze coolant solution from each cylinder and the return manifold directs the flow to