RING-BACK UP 3991941 - Caterpillar

9N0542 Crankshaft Seal Group
(1) 9N0307 Lip Type Seal. (2) 7W3200 Hydrodynamic Seal Group.
9N0542 Crankshaft Seal Group
(1) 7C6660 Hydrodynamic Type Seal. (2) 7W3200 Hydrodynamic Seal Group.(A) The distance from the edge of seal (1) to the gasket surface of the front housing is ... 38.10 0.50 mm (1.500 .020 in)(B) The distance from the edge of the hydrodynamic seal (3) to the edge of the wear sleeve is ... 4.30 0.25 mm (.169 .010 in)Remove front and rear seal groups as follows: a. Use the 1P3075 Puller Group to remove the seals.b. Use the 5P7318 Distorter Group to remove the wear sleeves. Seals and wear sleeves can not be used again after the seals and wear sleeves are separated.Install front and rear seal groups as follows:a. Clean the outer surface of the crankshaft with 6V1541 Quick Cure Primer.b. Crankshaft seals must be installed with the lip of the seal toward the inside of the engine as shown. The 9N0307 Lip Type Seal and the 7C6660 Hydrodynamic Seal Group are front crankshaft seals. The 7W3200 Hydrodynamic Seal Group is the rear crankshaft seal.c. Do not separate the seals from wear sleeves. Install the seal groups as a unit on each end of the engine as shown with correct tooling. See Special Instruction, Form No. SMHS7100 for the lip type seal assembly installation. See Special Instruction, Form No. SMHS8508 for the installation of the hydrodynamic seals.