CONTROL GP-UNPRGMED MONITOR 3083869 - Caterpillar

Remove Turbochargers (TW81, TW91)
Start By:a. remove air cleaner housings 1. Remove air cleaner housing support (1) from the back of the exhaust elbow.2. Drain the coolant from the engine cooling system. 3. Disconnect water lines (4) from the bottom of the turbochargers.4. Remove oil drain lines (5) and oil supply lines (2) from the engine.5. Remove clamps (3) and the seals that connect the turbochargers to the exhaust elbow. 6. Disconnect water lines (7) and (9) from the top of the turbochargers.7. Remove all of bolts (6) and bolts (8) that hold two pipes (10) to the air shutoff housing and exhaust manifolds. Remove pipes (10) from each side of the engine.8. Fasten a hoist to turbocharger (11). Remove the locknuts that hold turbocharger (11) to exhaust manifold (12). 9. Pull turbocharger (11) out of the exhaust elbow. There is an adapter that connects turbocharger (11) to the exhaust elbow and can be removed with the turbocharger. Remove turbocharger (11) from the engine. The weight of a turbocharger used on 3508 Engines is 34 kg (75 lb.). The weight of a turbocharger used on 3512 Engines is 59 kg (130 lb.).Install Turbochargers (TW81, TW91)
1. Make sure the studs for turbochargers (1) are tightened to a torque of 30 5 N m (22 4 lb.ft.).2. Install the gaskets on the ends of exhaust manifolds (2), and put 5P3931 Anti-Seize Compound on the threads of the studs.3. Fasten a hoist, and put turbocharger (1) and the adapter in position in the exhaust elbow and on exhaust manifold (2). Install the locknuts to hold the unit in position. 4. Connect upper water lines (3) and (5) to the turbochargers.5. Make sure the O-ring seals are installed on the ends of pipe (4). Put clean engine oil or glycerin in the bores for the O-ring seals for installation.6. Put pipes (4) and the gaskets in position. Install the bolts to hold pipes (4) and the flanges to the air shutoff housing and exhaust manifolds. 7. Install oil supply lines (6) and oil drain lines (8) with the gaskets.8. Connect lower water lines (7) to the turbochargers. 9. Install seal (10) and clamp (9) around each exhaust elbow adapter.10. Install the support for the air cleaner housings.11. Fill the cooling system with coolant to the correct level. See the Maintenance Manual.End By:a. install air cleaner housings