3054 Engine Caterpillar

Type 1 Engines and 9RM Engines

Note: For a complete description of Type 1 and Type 2 engines, refer to the Specifications Module, "Engine Design" for more information.

Illustration 1	g00295544

(1) Outside diameter of shaft for drive gear ... 15.91 to 15.92 mm (.626 to .627 inch)

(2) Diameter of bore of drive gear ... 15.86 to 15.88 mm (.624 to .625 inch)

Interference fit of drive gear on shaft ... 0.03 to 0.06 mm (.001 to .002 inch)

(3) Diameter of bore of impeller ... 15.87 to 15.89 mm (.625 to .626 inch)

Outside diameter of shaft for impeller ... 15.91 to 15.92 mm (.626 to .627 inch)

Interference fit of impeller on shaft ... 0.02 to 0.05 mm (.001 to .002 inch)

(4) Diameter of bearing ... 29.990 to 30.000 mm (1.1807 to 1.1811 inch)

Diameter of bore for bearing ... 29.960 to 29.980 mm (1.1795 to 1.1803 inch)

Interference fit of bearing in pump body ... 0.010 to 0.040 mm (.0004 to .0016 inch)

(5) The water pump must be assembled in order to correctly measure the distance from the impeller boss to the front face of the pump body. Distance ... 8.1 to 8.5 mm (.32 to .34 inch)

(6) The water pump must be assembled in order to correctly measure the distance of the gear from the rear face of the pump body. Distance ... 0.6 to 2.6 mm (.02 to .10 inch)

Type 2 Engines and 7BJ Engines

Note: For a complete description of Type 1 and Type 2 engines, refer to the Specifications Module, "Engine Design" for more information.

Note: The water pump for Type 2 engines and 7BJ engines is not serviceable. Contact your Caterpillar dealer for more replacement information.