Turbocharger Maintenance - KIRLOSKAR DV Series O & M Manual

6.6

Turbocharger Maintenance

IMPORTANT: Disassembly nullifies Schwitzer warranty responsibility so it is important to check
that the turbocharger is no longer under warranty before dismantling.
l. Mark the relative positions of the turbine housing and compressor cover to the bearing housing.
2. Check the motion of the shaft for excessive radial or axial play. Refer to the 'Service Limits and
Torque Values' Data Sheet.
3. Rest the turbocharger on the bench and unfasten the turbine housing clamp plates.
4. Lift off the turbine housing.
5. Repeat 3 for the compressor cover and carefully lift the cartridge assembly from the compressor
cover.
6. Clamp the 12 point socket wrench in the vice and place the hub of the turbine wheel into the socket
so that the shaft is in a vertical position.
7. Holding the cartridge in one hand release the compressor locknut.
NOTE : Left hand thread. Over tightening the nut may cause yield in the shaft.
8. Remove the nut and slide off the compressor wheel.
9. Carefully remove the shaft from the bearing housing assembly by gently tapping the shaft with a
small soft faced hammer.
TAKE CARE NOT TO BEND OR DAMAGE THE SHAFT.
10. Remove the turbine backplate and sit the bearing housing on the turbine backplate.
11. Remove the insert circlip using the circlip pliers. Remove the insert assembly using two levers and
remove the flinger sleeve from the insert.
12. Remove the oil deflector, thrust bearing and thrust sleeve from the bearing housing.
13. Using circlip pliers, remove the outer circlip from both ends of the bearing housing.
14. Remove the journal bearings.
NOTE : New bearings should be fitted on reassembly.
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