John Deere 9.0 L Diesel Engines — Remove Turbocharger
Repair & overhaul
For the John Deere 9.0 L Diesel Engines, from the John Deere service manual.
Applies to: John Deere 6090H engine
Before you start
- After operating engine, allow exhaust system to cool before removing turbocharger.
- Do not clean exterior of turbocharger prior to removal; doing so may wash away evidence of a potential failure mode.
Procedure
- Thoroughly clean exterior of turbocharger and surrounding area to prevent entry of dirt into the air intake system.
- Disconnect air intake and exhaust piping from turbocharger.
- Disconnect turbocharger actuator coolant supply line and coolant drain line.
- Disconnect turbocharger sensor connections.
- Disconnect turbocharger oil supply line at turbocharger and oil filter base; set line aside.
- Disconnect turbocharger oil drain line; remove two cap screws at flange and at tension clamp joint; remove drain line and gasket.
- Remove four turbocharger mounting cap screws with washers securing turbocharger to rear exhaust manifold; remove turbocharger.
- Cap or plug all openings on engine and place turbocharger on a clean flat table for inspection.
- Perform turbocharger seven-step inspection if failure mode has not been determined.
Full service-parts list: John Deere 6090H engine →
Source: John Deere service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.