MANIFOLD 4257139 - Caterpillar

START BY:a. remove turbocharger The illustrations and procedure which follow were performed on the T04. 1. Put the turbocharger in position on tool (A).2. Put an alignment mark on compressor housing (1) and the backplate assembly for use at assembly. Remove the compressor housing from the backplate assembly. 3. Change the position of tool (A) so the compressor wheel is up as shown.4. Put an alignment mark on housing (2) and turbine housing (3) so that the housing can be put back in the same position in the turbine housing at assembly.5. Remove the bolts, lockplates and clamps that hold the housing in the turbine housing, and remove the housing. 6. Put the housing in position on tool (B).
Do not put a side force on the shaft when the nut is removed.
7. Use tool (C) and a socket of the correct size to remove nut (5) from the shaft.8. Remove compressor wheel (4) from the shaft.9. Remove the housing from the shaft. 10. Remove shroud (6) from the turbine wheel and shaft. 11. Remove seal ring (7) from the turbine wheel. 12. Put an alignment mark on the housing and backplate assembly for use at assembly. Remove the bolts and plates that hold the housing to the backplate assembly. Remove the housing.13. Remove bearing (8), collar (9) and the seal ring from backplate assembly (10).14. Remove the seal ring and bearing from the collar. 15. Remove seal ring (11) from the housing.16. Remove the snap ring, bearing (12) and the snap ring from each side of the housing.Assemble Turbocharger (AiResearch T04 or TW4)
The illustrations and procedure which follow were performed on the T04.1. Make sure the oil passages are clean and free of all dirt or foreign material. Put clean engine oil on all of the parts before assembly.
The snap rings must be installed with the rounded outside edge toward the bearing.
2. Install the inner snap ring, bearing (1) and snap ring (2) in each side of the housing. 3. Install the seal ring on collar (4).4. Put bearing (3) in position on the collar.
The oil grooves in the bearing must be clean and free of all dirt or foreign material. The bearing must be installed with the oil grooves toward the housing.
5. Put the bearing and collar in position on the housing so the oil grooves in the bearing are toward the housing and the holes in the bearing are in alignment with the pins in the housing.
Be extra careful during installation of the bearing and collar not to cause damage to the seal ring on the collar.
6. Install the seal ring on the housing.7. Put the backplate assembly in position on the housing respective to the alignment marks put on the housing and backplate at disassembly. Install the plates and bolts. Tighten the bolts to a torque of 8.5 to 10.2 N m (75 to 90 lb.in.). 8. Install shrould (5) on the housing. 9. Put 6V2055 High Vacuum Grease in the groove for seal ring