Usage:
FLUID SPILLAGE CONTAINMENT
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the machine. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids. Refer to "TOOLS AND SHOP PRODUCT GUIDE, NENG2500", for tools and supplies suitable to collect and contain fluids in Caterpillar machines. Dispose fluids according to local regulations and mandates.
3412 Engine Shown
3408 Engine Shown
NOTE: Turbocharger return oil line (1) is routed behind the exhaust manifold on the 3408 engine.
1. Remove turbocharger return oil line (1).
NOTE: There is only one shield (2) on the 3408 engine.
2. Remove two shields (2) from exhaust manifold (3).
3. Remove clamp (4).
4. Remove nuts, spacers, and brackets (5). Nuts are one-time use only. Discard nuts.
5. Remove exhaust manifold (3).
6. Remove the gaskets from the exhaust manifold or studs.
7. Separate section (6), sections (7) and section (8).
Install Exhaust Manifold
| NOTICE |
|---|
Make sure the 2P-2333 Manifold Sealer does not get on the inside of each manifold. Damage to the turbocharger could be the result if the manifold sealer gets on the impeller on the turbocharger. |
1. Apply a thin coat of 2P-2333 Manifold Sealer to the O.D. of male end of the manifold sections (7) and section (8). Coat the female ends of the manifold with clean engine oil.
2. Connect sections (6), sections (7) and section (8).
3. Install 5P-3931 Anti-Seize Compound on the threads of studs (9).
4. Install the gaskets with the wording "Manifold Side" facing the manifold on the studs.
5. Install exhaust manifold (3).
Tightening Sequence For 3408 Exhaust Manifolds
Tightening Sequence For 3412 Exhaust Manifolds
6. Install new nuts, spacers, and brackets (5). Tighten the nuts in the sequence shown to a torque of 20 ± 3 N·m (15 ± 3 lb ft). Then, tighten the nuts in the sequence shown to a torque of 38 ± 5 N·m (28 ± 4 lb ft).
7. Install clamp (4).
NOTE: There is only one shield (2) on the 3408 engine.
8. Install two shields (2) to exhaust manifold (3).
9. Using a new O-ring seal at the bottom and a new gasket at the top, install turbocharger return oil line (1).