CORE AS-OIL COOLER 1789283 - Caterpillar

(1) Torque for three long studs in cylinder block ... 27 4 N m (20 3 lb ft) Put 9S3263 Thread Lock on threads of short stud in front housing.(2) Oil seal. Put clean engine oil on the seal lip. Assemble with the lip toward the bearings.(3) Seal. Put a thin layer of clean engine oil in the bore for the seal.(4) Ring and water seal. Use a 7N7843 Seal Installation Tool and hand pressure to install the rubber seal and ceramic ring as a unit in the pump housing bore. Make sure the identification mark (holes or groove) on the ceramic ring face is installed inside the rubber seal.(5) Seal assembly. a. Remove the spring from the seal.b. Put clean water on the seal assembly as the only lubrication for assembly. Do not get any grease or oil on the seal faces.c. Do not stretch the rubber of the seal assembly at installation. If the seal is stretched, the service life is shortened.d. Use a 7N7843 Seal Installation Tool and hand pressure to install the seal assembly on the pump shaft until the carbon face makes light contact with the smooth face of the ceramic ring. The carbon seal assembly must rotate with the water pump shaft. Do not use any lubricant (except clean water) that will reduce the friction between the seal and the shaft.e. Install the carbon seal assembly spring.(6) Shaft diameter at carbon seal assembly seat area must be ... 19.10 0.05 mm (.752 .002 in) Use 4C9500 Quick Cure Primer to clean the water pump shaft and the ceramic ring seal counterbore in the pump housing.(7) Torque for the bolt that holds the impeller ... 39 3 N m (28 2 lb ft)(8) Clearance between impeller and housing ... 0.56 to 1.50 mm (.022 to .059 in)