ROTATING GP-PUMP 1765069 - Caterpillar

(1) Torque for bolt that holds the impeller ... 39 3 N m (28 2 lb ft)(2) Shaft diameter at carbon seal assembly seat area must be ... 19.10 .05 mm (.752 .002 in) Use 6V1541 Quick Cure Primer to clean the water pump shaft and the ceramic ring seal counterbore in the pump housing.(3) Ring and water seal. Use a 7N7843 Seal Installation Tool for the 3406 engines or a 2W9102 Seal Installation Tool for the 3406B engines. Use the correct 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.(4) 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 for the 3406 engines or a 2W9102 Seal Installation Tool for the 3406B engines. Use the correct 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.(5) Clearance between the impeller and the housing ... 0.56 to 1.50 mm (.022 to .059 in)(6) Oil seal. Put a small amount of clean engine oil on the lip of the seal at assembly. Install it with the lip toward the bearings as shown.(7) Torque for bolt that holds the gear ... 205 25 N m (150 20 lb ft)