Product Description 1. Application: Perfectly compatible with 1989-2016 Cummins 4BT 3.9L, B Series 5.9L, ISB 5.9L 6.7L, QSB 5.9L 6.7L and ISL9 L9 9.0L. This tool set works for seals and wear sleeves such as 3937111, 3904353, 3802820, 3934486, 3926126 & 3925529. There is no tool to remove the rear wear sleeve if you have one. (Note: If you're working on an ISB in a medium duty application it will require front installer 3164659 instead.) 2. High Performance: Helps easily and properly remove and install the rear crankshaft seal / wear sleeve without damage and leakage, ensures that the installation depth of the crankshaft oil seal is correct. .
