COVER 2656722 - Caterpillar

Jacket Water System
Illustration 1 g02690897
Schematic of the coolant flow for the jacket water cooling system
(1) Radiator
(2) Cylinder block and cylinder heads
(3) Turbocharger
(4) Oil cooler
(5) Exhaust bypass valve
(6) Water lines group
(7) Water-cooled exhaust manifold
Illustration 2 g02691457
Right side engine view
(8) Tube for the coolant from the turbocharger and the exhaust bypass valve to the water-cooled exhaust manifold
(9) Water temperature regulator housing
(10) Outlet of the water temperature regulator housing
(11) Tube for the inlet coolant to the turbocharger and to the exhaust bypass valve
(12) Outlet bonnet of the engine oil cooler
(13) Inlet bonnet of the engine oil cooler
(14) Inlet for the jacket water pump The jacket water pump is located on the right front side of the engine and is part of water lines group (6). The water pump is gear driven by the front gear group. Coolant from the radiator (1) is drawn into water pump inlet (14). The rotation of the impeller inside the jacket water pump creates coolant flow in the cooling system. The coolant flows from the water pump to the inlet bonnet of the engine oil cooler (13).As the coolant leaves engine oil cooler (4), the