TUBE AS 4318921 - Caterpillar

Illustration 1 g00955608
Note: For the correct procedure on measuring for a bent crankshaft, refer to the Guideline for Reusable Parts, SEBF8054, "Procedure to Measure and Straighten Crankshafts". (1) The length of the dowel from the surface of the crankshaft ... 4.1 0.5 mm (0.16 0.02 inch) (2) The length of the dowel from the surface of the crankshaft ... 6.4 mm (0.25 inch) (3) Main bearing journal (4) Connecting rod bearing journalRefer to Specifications, "Connecting Rod Bearing Journal" and Specifications, "Main Bearing Journal" for more information about the crankshaft journals. (5) Crankshaft end play The end play for the crankshaft (new) ... 0.15 to 0.55 mm (0.007 to 0.022 inch) The maximum permissible end play with used bearings ... 0.89 mm (0.035 inch) (6) Timing gearNote: The timing mark "V" must be oriented to the front of the crankshaft when the gear is installed.Crankshaft Seals
Illustration 2 g00960341
Note: Refer to Special Instruction, SMHS8508, "Special Handling Information and Installation Instructions for Crankshaft Seal Groups That Have Hydrodynamic Grooves In the Sealing Lip" for the correct procedure on the installation of the front and the rear seals..Note: Do not separate the seal from the sleeve. If the seal is separated from the sleeve, the seal must be replaced. (1) Front crankshaft seal During installation, the seal driver should not contact the seal within the following diameter. ... 177.80 0.25 mm (7.000 0.010 inch) After installation, the face of the seal's wear sleeve should be flush with the front face of the crankshaft with the following tolerance. ... -0.13 to 0.13 mm (-0.005 to 0.005 inch) After installation, the front face of the seal's casing should be within the following dimension from the front face of the crankshaft. ... 5.28 + 0.00 - 0.60 mm (0.208 + 0.000 - 0.024 inch) After installation, the face of the seal's casing must be parallel with the front face of the crankshaft within the following tolerance. ... 0.13 mm ( 0.005 inch) (2) Rear crankshaft seal During installation, the seal driver should not contact the seal within the following diameter. ... 177.80 0.25 mm (7.000 0.010 inch) After installation, the face of the seal's wear sleeve should be within the following dimension from the rear face of the crankshaft. ... 1.5 0.5 mm (0.06 0.02 inch) After installation, the face of the seal's casing should be within the following dimension from the rear face of the crankshaft. ... 6.4 + 0.0 - 0.6 mm (0.25 + 0.00 - 0.03 inch) After installation, the face of the seal's casing must be parallel with the rear face of the crankshaft within the following tolerance. ... 0.13 mm ( 0.005 inch)