Remove the front crankshaft seal.
Cummins N14 – Crankshaft Seal, Front – Installation
NOTE: ‘‘LDL TFE’’ (Lay-down Lip, Teflon) oil seals for service replacement have an assembly tool which protects the seal lip during shipment and installation. The ‘‘LDL TFE’’ oil seal must be installed with the lip of the seal and the crankshaft clean and dry. Do not use any kind of lubricant. The use of lubricant will result in oil leakage at the seal.
Use hand pressure to push the oil seal from the assembly tool onto the crankshaft as far as possible. Remove the assembly tool.
Install top plate, Part No. ST-1259-1, (from oil seal puller/installer, Part No. ST-1259) on the crankshaft; and use three vibration damper mounting capscrews and flat washers.
Tighten the three capscrews alternately in 1/2 turn increments until top plate, Part No. ST-1259-1, seats against the crankshaft nose.
Remove the oil seal puller/installer, Part No. ST-1259.