PISTON 1489789 - Caterpillar

Removal Procedure
Illustration 1 g02476645
Typical example
If necessary, remove exhaust back pressure valve (1) from exhaust elbow (2). Refer to Disassembly and Assembly, "Exhaust Back Pressure Valve - Remove and Install" for the correct procedure.
Remove nuts (4) from turbocharger (6).
Make temporary marks on exhaust elbow (2) and turbocharger (6) to show correct orientation. Remove exhaust elbow (2) from turbocharger (6).
Remove gasket (5) (not shown) from turbocharger (6).
If necessary, remove studs (3) from turbocharger (6). Installation Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 4C-5597 Anti-Seize Compound 1
Illustration 2 g02476645
Typical example
Ensure that the exhaust elbow and the outlet of the turbocharger are free from damage. Replace any components that are damaged.
If necessary, install studs (3) to turbocharger (6). Use Tooling (A) to lubricate the threads of studs (3). Tighten the studs to a torque of 18 N m (159 lb in).
Position a new gasket (6) (not shown) onto turbocharger (6).
Install exhaust elbow (2) onto turbocharger (6). Ensure that the exhaust elbow is correctly orientated.
Use Tooling (A) to lubricate the threads of nuts (4). Install nuts (4) onto turbocharger (6). Tighten the nuts to a torque of 44 N m (33 lb ft).
If necessary, install exhaust back pressure valve (1) to exhaust elbow (2). Refer to Disassembly and Assembly, "Exhaust Back Pressure Valve - Remove and Install" for the correct procedure.