Detroit Diesel 4000 Series, Service Manual, Page: 997 / 2706

SERIES 4000 12/16V SERVICE MANUAL
C 101.05.08 – INSPECTION AND REPAIR
Perform the following steps to inspect and repair the turbocharger:
1. Clean all components and visually inspect for damage and defects.
[a] If components show damage or defects, replace as necessary.
[b] If components do not show damage or defects, continue inspection.
2. Inspect turbocharger for ease of movement.
[a] If turbocharger does not show ease of movement, repair or replace as necessary.
[b] If turbocharger does show ease of movement, continue inspection.
3. Visually inspect axial clearance and radial clearance.
[a] If axial clearance and radial clearance are beyond specified limits, repair or replace
component as necessary.
[b] If axial clearance and radial clearance are not beyond specified limits, continue
inspection.
4. Visually inspect turbocharger for external damage, in particular in area of turbine and
compressor wheels.
[a] If turbocharger shows damage, replace component as necessary.
[b] If turbocharger does not show damage, continue inspection.
5. Visually inspect all sealing and seating surfaces for damage and irregularities.
[a] If sealing or seating surfaces show damage or irregularities, rub down with an
oilstone or emery cloth as necessary.
[b] If damage is beyond repair, replace component as necessary.
[c] If sealing and seating surfaces do not show damage or irregularities, continue
inspection.
6. Inspect thread of studs for ease of movement.
[a] If threads do not show ease of movement, replace studs as necessary.
[b] If threads show ease of movement, continue inspection.
7. Always replace nuts securing turbocharger, sealing rings and gaskets.
8. Major overhaul of turbocharger is scheduled during W6 maintenance.
All information subject to change without notice.
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