GENERATOR AR 4W8963 - Caterpillar

TYPE="LEVEL" DEPTH="1" @@@-->Heat Exchanger or Keel Cooler
(A1). 5R-0066 Flange (Jacket Water Inlet). From heat exchanger to regulator/deaerator housing. 89.69 mm (3.531 in) diameter hole.(A). 5R-0066 Flange (Jacket Water Outlet). From regulator/deaerator housing to heat exchanger. 89.69 mm (3.531 in) diameter hole.(B). 4D-3967 Bushing (Regulator Housing). From top of regulator/deaerator housing connection to expansion tank. 1-111/2 NPT Thread. Air Vent Line (From regulator housing to expansion tank). 8 mm (0.315 in) ID minimum diameter.(C). 7X-7731 Plug (Inlet Elbow). To jacket water pump. 3/4-14 NPT Thread. Water Line (From bottom of inlet elbow to expansion tank). 25.4 mm (1.00 in) ID minimum diameter.(D). Raw Water Pump Outlet (For heat exchanger cooled engines). 50.8 mm (2.00 in) Outside Diameter (OD).(E). Raw Water Pump Inlet (For heat exchanger cooled engines). 21/2-8 NPT Thread.Expansion Tank Pressure Cap Pressure Requirements
The pressure cap design, pressurized or nonpressurized with vent opening, is dependent on the height of the expansion tank water level ABOVE the jacket water pump inlet: Up to 1.5 m (0 to 5 ft) ... 96.5 kPa (14 psi)1.50 to 6.0 m (5 to 20 ft) ... 48 kPa (7 psi)6.0 to 9.0 m (20 to 30 ft) ... NonpressurizedABOVE 9.0 m (30 ft) ... NOT recommended