HEAD 6J3987 - Caterpillar

Start By:
Remove the exhaust elbow.
If reusing the exhaust elbow, and or the bellows, refer to Special Instruction, REHS5014, "Reuse Guideline for the Lines Group - Flexpipe on Tier 4 Engines".
Illustration 1 g02345276
Place Mark (X) at all four locations as shown. This action will aid in the installation of the lines group.
Loosen clamp assemblies (1) and (3). Remove lines group (2) .
Illustration 2 g02125717
Failure to follow established procedures can lead to damage of the parts.To avoid damage to the parts, always identify and mark the parts so that the parts can be installed in the same location.
The ends of the bellows are very sharp. Injury could occur if the bellows are not handled properly. Handle the bellows by the convolutions.
Note: Refer to Special Instruction, REHS1728, "Application Guideline for the Bellows" for additional information on handling the bellows if the machine is equipped.
Remove both clamp assemblies (5). Remove bellows (6) and position exhaust tube assemblies (4) and (7) aside. Discard clamp assemblies (5) and bellows (6) .
Illustration 3 g02346241
Place Mark (Y) at all four locations as shown. This action will aid in the installation of the lines group.
Remove clamp assemblies (8) and (10), and remove lines group (9) .
Illustration 4 g02346256
Remove both clamp assemblies (12). Remove bellows (13) and position tube assemblies (11) and (14) aside. Discard clamp assemblies (12) and bellows (13) .
Illustration 5 g02346276
Remove clamp assemblies (16) and remove elbow assemblies (15) and (17). Discard clamp assemblies (16) .
Remove tube assemblies (18) and (19) .
Illustration 6 g02346296
Attach a suitable lifting device to low-pressure turbocharger (20). The weight of the turbocharger is approximately 54 kg (120 lb). Remove nuts (21) and remove the turbocharger. Discard nuts (21) .Installation Procedure
If reusing the exhaust elbow, and or the bellows, refer to Special Instruction, REHS5014, "Reuse Guideline for the Lines Group - Flexpipe on Tier 4 Engines".Note: Check all of the O-ring seals, the gaskets, and the seals for wear or for damage. Replace the components, if necessary.
The alignment of the bellows is important. Improper alignment may lead to premature failure of the bellows. Misalignment can be identified by visually inspecting the convolutions for uniformity of compression.Inspect the bellows for damage prior to installation. If there is any damage to the convolutions, discard the bellows. Minor damage to the ends of the bellows may be repaired. However, if there is any difficulty in installation after the repair, discard the bellows.
Install low-pressure turbocharger (20) in the reverse order.
Apply Tooling (A) to the threads of the studs and to the threads of the new nuts (21). Tighten nuts (21) to a torque of 70 5 N m (52 4 lb ft).
Install new clamp assemblies (16). Torque clamp assemblies (16) to a torque of 20 1 N m (177