BODY AS-PISTON 9Y4124 - Caterpillar

Illustration 1 g00874038 (1) Oil seal
Assemble the seal with the lip toward the end of the pump shaft with the spline.
Do not lubricate the sealing lip of the oil seal. (2) Ceramic ring and rubber water seal
Put clean water on the rubber seal and the ceramic ring.
Use the seal installation tool and hand pressure to install the rubber seal and the ceramic ring as a unit in the housing bore. Be certain that the identification groove of the ceramic ring is installed inside the rubber seal. Note: The seal installation tool is part of the replacement seal assembly. (3) Seal assembly
Remove the spring from the seal assembly.
Put clean water inside the seal assembly.
Use the seal installation tool and hand pressure to install the seal assembly on the shaft until the face of the carbon seal and the ceramic ring make light contact with each other. Note: The seal installation tool is part of the replacement seal assembly.
Install the spring. (4) O-ring seal
Lubricate the bore of the pump housing with clean engine oil. (5) Bearing bore Bearing bore in the new bearing for the auxiliary drive shaft ... 75.000 0.055 mm (2.9528 0.0022 inch)Diameter of new auxiliary drive shaft ... 74.900 0.015 mm (2.9488 0.0006 inch) (6) Bearing depth The bearing is installed at the following distance from the end of the housing: ... 1.5 0.5 mm (0.06 0.02 inch)Note: Position the oil hole in the bearing in alignment with the oil hole in the housing.