0435990 EVINRUDE IMPELLER HOUSING ASSY.

1. Drain the coolant from the cooling system. 2. Remove step plates (1) from the turbochargers. 3. Loosen clamp (2), move the rubber connector off of the turbocharger. 4. Remove the shield assemblies from elbow (3). Attach a hoist to elbow (3). Remove the bolts holding elbow (3). Remove elbow (3), the springs and the ring seals. The weight of the elbow is approximately 55 kg (120 lb).5. Loosen clamps (4) and (5). Move the rubber connector and the exhaust piping off of the turbocharger. It may be necessary to remove the exhaust piping held by clamp (5) completely. If removed, use a hoist. If not removed, tie up in place. 6. Disconnect two oil drain lines (6) from the turbochargers. 7. Remove all of the bolts that hold tube assembly (7) to the turbocharger support group. There is also a clip and bolt on tube assembly (7) at the flywheel end of the turbo support group. Remove these also. Remove tube assembly (7). 8. Remove two tube assemblies (8) and the mounting clips. 9. Disconnect two oil drain lines (9) from the turbochargers.10. Remove eight bolts (10) [four on each side]. 11. Remove tube (11).12. Disconnect two tube assemblies (12) from the regulator housing. Remove the tube assemblies. 13. Remove the bolts and washers that hold two pipes (13) in the aftercooler housings. 14. Mark wires (14) for identification. Disconnect from tube assembly (16).15. Remove the mounting bolts and tube assembly (16).16. Remove eight bolts (15) that connect the turbocharger support group to the auxiliary drive. 17. Attach a hoist to the turbocharger support group in a manner that the unit will be held level. Remove twelve bolts (18).
Do not remove four bolts (17) that hold bracket (19) to the side rails.
18. Remove the support group and all turbochargers as a unit. The weight of the unit is approximately 475 kg (1045 lb). The following steps are for the installation of all turbochargers and the support group.19. Put the gaskets in place for the oil drain lines on the drain lines and the exhaust manifolds. Tie in place with tag wire.20. Use a hoist to install the turbocharger support group and the turbochargers as a unit.21. Install twelve bolts (18).22. Install eight bolts (15) that connect the turbocharger support group to the auxiliary drive.23. Use new O-ring seals. Install the mounting bolts and tube assembly (16).24. Identify and connect wires (14) to tube assembly (16).25. Install new O-ring seals. Install the bolts and washers that hold two pipes (13) in the aftercooler housings.26. Install tube (11).27. Install the O-ring seals. Connect two tube assemblies (12) to the regulator housing.28. Be sure the gaskets are in place. Connect two oil drain lines (9) to the turbochargers.29. Be sure the gaskets are in place. Apply 5P3931 Anti-Sieze Compound to the bolts and washers. Install eight bolts (10).30. Install tube assembly (7). Install the bolts that hold tube assembly (7) to the turbocharger support group.31. Use new O-ring seals. Install two tube assemblies (8) and the mounting clips.32. Be sure the gaskets are in place. Connect two oil drain lines (6) to the turbochargers.33. Be sure the springs and the ring seals are in place. Apply 5P3931 Anti-Sieze Compound to the bolts and washers. Attach a hoist to elbow (3). Install elbow (3). Install the shield assemblies to elbow (3).34. Move the rubber connector and the exhaust piping in position on the turbocharger. Tighten clamps (4) and (5). It may be necessary to install the exhaust piping held by clamp (5), completely. If required, use a hoist.35. Move the rubber connector in position on the turbocharger. Tighten clamps (2).36. Install step plates (1) to the turbocharger.37. Fill the cooling system with coolant to the proper level. See the Operation and Maintenance Manual.Remove And Install Turbochargers (Low Pressure)
At operating temperature, the engine coolant is hot and under pressure. Steam can cause personal injury. Drain the coolant only after the engine has been stopped and the fill cap is cool enough to touch with your bare hand. Remove the fill cap from the radiator slowly to relieve pressure. Cooling system conditioner contains alkali. Avoid contact with the skin and eyes to avoid personal injury.
1. Drain the coolant from the cooling system. 2. Remove step plates (1) as required.
It may be necessary to tie up (or remove) the exhaust pipe held by clamp (3) when the turbocharger is removed. If removed, use a hoist.
3. Loosen clamps (2) and (3) as required. The procedure for removing both low pressure turbos is the same. Only one is shown. 4. Remove four bolts and washers (4). Remove the O-ring seal when turbocharger is removed.5. Disconnect both ends and remove line (6). Remove the O-ring seals.6. Remove the bolts to disconnect drain line (5). Remove the gasket. 7. Disconnect and remove line (7) from the turbocharger. Remove the O-ring seals.8. Disconnect both ends and remove line (10). Remove the O-ring seals.9. Attach a hoist to the turbocharger.10. Remove eight bolts and washers (8). Remove the O-ring seal when the turbo is removed.11. Remove four bolts, spacers and locknuts (9).12. Remove adapter (11) from the turbocharger. Remove the O-ring seal. 13. Disconnect line (12) from the turbocharger. Remove the O-ring seal.14. Remove the bottom mounting bolts. Remove the turbocharger. The weight of the turbocharger is approximately 95 kg (210 lb). The following steps are for installing the low pressure turbocharger.15. Install the turbocharger. The weight of the turbocharger is approximately 95 kg (210 lb). Apply 5P3931 Anti-Sieze Compound to the bolts and washers. Install the bottom mounting bolts.16. Install the O-ring seal. Connect line (12) to the turbocharger.17. Install the O-ring seal and adapter (11).18. Install the O-ring seal. Connect line (7) to the turbocharger.19. Install the O-ring seals on line (10). Install line (10) and any clips.