TANK & MTG GP-FUEL 3581760 - Caterpillar

Introduction
The following Special Instruction is used to replace the turbine inlet bellows on C175 Engines.Do not perform any procedures listed in this Special Instruction until you have read and understood the information.Required Tooling
Table 1
Tooling
Part Number Description
421-4080 Tool As
452-6804 Tool As Required Parts
Table 2
793F, 795F, 797F, and Locomotive Low Altitude Arrangements
Part Number Description Quantity
446-1290 V Band Clamp 8
443-5940 Bellows As 4 Note: All four turbocharger locations utilize the same turbine inlet elbows on low altitude arrangements.
Table 3
793F and 795F High Altitude Arrangements
Part Number Description Quantity
446-1290 V Band Clamp 4
443-5940 Bellows As 2 Note: Only the two outside turbocharger locations utilize the new turbine inlet bellows. The inner two turbochargers utilize a differentNote: The 797F HAA does not use this bellows assembly.Removal and Installation Procedure
Illustration 1 g03545418
(1) Existing V band clamps
Remove V band clamps (1) from the current turbine inlet bellows and discard the clamps.
Illustration 2 g03545436
(2) 348-9252 Bellows As
Install the 421-4080 Tool As and compress bellows assembly (2).
Removed the existing bellows assembly.
Illustration 3 g03545737
Section view of the bellow tool installed
(A) Bellows tool
(B) Bellow ring
(C) Bellow
Install the 452-6804 Tool As onto the new 443-5940 Bellows As. Refer to Illustration 3 for the correct installation of the tool assembly.
Compress the new bellows enough to allow for installation between the exhaust manifold and turbocharger.Note: Ensure that the flow arrow on the bellows is pointing in the correct direction of exhaust flow.
Release and remove the compression tool after bellows is in place.
Install new 446-1290 V Band Clamps onto the turbine inlet bellows.
Illustration 4 g03546119
(3) Bellow ring fully seated
(4) Bellow ring not fully seated
Ensure that the new bellows ring is fully seated under the clamp prior to tightening the V band clamp. Refer to Illustration 4.Note: If the ring is not fully seated, remove the clamp and seat the ring again.
Tighten the clamp assemblies to 17 2 N m (150 17 lb in). Lightly tap around the clamp and retighten to 17 2 N m (150 17 lb in).