SUPPLEMENT FOR 3116 & 3126 MARINE ENGINE Caterpillar


Watercooled Turbocharger

Usage:

Remove & Install Watercooled Turbocharger (3126 Engine)

Start by:

a. remove air filter

1. Loosen hose clamp (1).

2. Disconnect hose assembly (4). Cap and plug all openings immediately.

NOTE: Tooling 143-9730 and 143-9731 are required for bolt removal.

3. Remove bolt and washer (2) (not shown).

4. Remove bolt, washer and cable (5).

5. Loosen hose clamp (6).

6. Disconnect hose (8). Cap and plug all openings immediately.

7. Attach a lifting strap and a suitable lifting device to turbocharger exhaust tube (7).

8. Remove bolts and washers (3).

10. Remove turbocharger exhaust tube (7). Turbocharger exhaust tube (7) weighs 24 kg (54 lb).

11. Remove turbocharger oil supply tube (9).

12. Remove turbocharger oil drain tube (11).

13. Loosen hose clamp (10).

14. Remove the four locknuts that hold the turbocharger to the exhaust manifold and remove turbocharger (13).

NOTE: Place alignment marks on the turbocharger cartridge and the turbocharger compressor and turbine housings. Alignment marks will be used during assembly.

NOTE: The turbocharger is serviceable at cartridge level only, or replace the complete turbocharger. Internal parts are not serviced.

15. Loosen the V-band clamps (12) and remove the turbocharger compressore and turbine housings from the turbocharger cartridge.

NOTE: The following steps are for the installation of the turbocharger.


NOTICE

Do not over tighten the turbocharger V-band clamps.


16. Install the turbocharger compressor and turbine housings to the turbocharger cartridge. Tighten the V-band clamps (12) that hold the turbocharger compressor and turbine housings to the turbocharger cartridge to a torque of 13.5 ± 0.1 N·m (119.00 ± 1.00 lb in). Tap the clamps lightly all around and tighten the V-band clamps again to 13.5 ± 0.1 N·m (119.00 ± 1.00 lb in).

17. Apply 5P-3931 Anti-Seize Compound on the threads of the turbocharger mounting studs.

18. Check the condition of the gasket used between the turbocharger and the exhaust manifold. If the gasket is damaged, use a new part for replacement.

19. Put the gasket and turbocharger (13) in position on the exhaust manifold. Install the locknuts that hold it. Tighten the locknuts to a torque of 54 ± 5 N·m (40 ± 4 lb ft).

NOTE: Check the condition of the gaskets used between the turbocharger and the oil supply and oil drain tube assemblies. If the gaskets are damaged, use new parts for replacement.

20. Install turbocharger oil drain tube (11).

21. Install turbocharger oil supply tube (9).

22. Tighten hose clamp (10).

23. Connect hose assembly (4).

24. Connect hose (8) and tighten the clamp.

25. Attach a lifting strap and a suitable lifting device to turbocharger exhaust tube (7). Install turbocharger exhaust tube (7) in its original position and secure with bolts (3). Turbocharger exhaust tube (7) weighs 24 kg (54 lb).

26. Tighten hose clamp (6).

27. Install bolt and washer (2) (not shown).

28. Tighten hose clamp (1).

29. Install cable (5), washer and bolt.

End by:

a. install air filter

Caterpillar Information System:

SUPPLEMENT FOR 3116 & 3126 MARINE ENGINE Watercooled Turbocharger
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