NUT 5K1764 - Caterpillar

Removal Procedure
The ends of the bellows are very sharp. Injury could occur if the bellows are not handled properly. Handle the bellows by the convolutions.
The bellows must be supported at all times when the bellows are not installed in the application. Failure to support the bellows adequately could result in the failure of the bellows. Do not use power tools in order to disassemble or assemble any part of the flexible exhaust system.The alignment of the bellows is important. Incorrect alignment may lead to premature failure of the bellows. Misalignment can be identified by visually inspecting the uniformity of the spacing between the convolutions on the bellows.Inspect the bellows for damage prior to installation. If there is any damage to the convolutions, discard the bellows. If there is any difficulty in installation after the repair, discard the bellows.
Illustration 1 g03795627
Typical example
Remove exhaust temperature sensor (3) from flexible exhaust pipe (5). Refer to Disassembly and Assembly, "Temperature Sensor (Exhaust) - Remove and Install" for the correct procedure.
Remove nitrogen oxide sensor (4) from flexible exhaust pipe (5). Refer to Disassembly and Assembly, "Nitrogen Oxide Sensor - Remove and Install" for the correct procedure.
Loosen V-band clamp (2) and V-band clamp (6) in order to allow flexible exhaust pipe (5) to be removed from Diesel Oxidation Catalyst (DOC) (1) and turbocharger (7).
Remove flexible exhaust pipe (5), V-band clamp (2), and V-band clamp (6). Installation Procedure
Inspect the bellows for damage prior to installation. If there is any damage to the convolutions, discard the bellows. If there is any difficulty in installation after the repair, discard the bellows.
Check the flexible exhaust pipe assembly for damage. Refer to Special Instruction, REHS5014, "Reuse Guideline for the Flexible Exhaust Pipe Group on Tier 4 Engines" for more information. If any part of the flexible exhaust pipe assembly is damaged, replace the flexible exhaust pipe as an assembly.
Illustration 2 g03795627
Typical example
Position a new V-band clamp (2) onto DOC (1).
Position a new V-band clamp (6) onto turbocharger (7).
Install flexible exhaust pipe (5) onto turbocharger (7) and DOC (1). Install V-band clamp (2) and V-band clamp (6) onto the flexible exhaust pipe. Ensure that the V-band clamps are correctly positioned onto the flexible exhaust pipe. Note: Ensure that the assembly of the flexible exhaust pipe is supported at all times.
Tighten V-band clamp (2) and V-band clamp (6) to a torque of 15 N m (133 lb in).
Install exhaust temperature sensor (3) to flexible exhaust pipe (5). Refer to Disassembly and Assembly, "Temperature Sensor (Exhaust) - Remove and Install" for the correct procedure.
Install nitrogen oxide sensor (4) to flexible exhaust pipe (5). Refer to Disassembly and Assembly, "Nitrogen Oxide Sensor - Remove and Install" for the correct procedure.