CYLINDER AS 1917738 - Caterpillar

3606 (8RB);
3608 (6MC);
3612 (9RC);
3616 (1PDIntroduction
This special instruction provides the procedure and the tooling needed to wash the turbine (hot) side of turbochargers used on 3600 Series Engines. In order to use this procedure, the engine must be equipped with the later turbocharger water wash lines groups. Refer to Chart 1.During the normal operation of a Heavy Fuel Oil (HFO) engine, deposits form on the turbine nozzle vanes and turbine wheel blades. The deposits can cause poor efficiency and low performance of the turbochargers. Higher than normal exhaust port temperatures, higher than normal exhaust manifold pressures, and lower than normal air inlet manifold pressures are indications that the turbocharger is not operating at peak efficiency. It is recommended for engines operating on HFO that the turbine side of the turbochargers be water washed every 100 hours of engine operation. More frequent cleaning may be required in severe applications.This water wash procedure is intended to remove light buildups of deposits. If after completion of this procedure the turbocharger does not return to normal efficiency, indicated by the air inlet manifold pressures and exhaust port temperatures, the turbocharger should be disassembled and a complete mechanical cleaning performed. The water supply to the wash control module should be clean. Fresh water should be supplied at a minimum of 240 kPa (35 psi) pressure and 21 L/min (5.5 gpm). Salt water should not be used.Necessary Tooling
Installation
Procedure
Turbocharger Water Wash Lines Group: Water injection valve (1). Nipple (2). Nipple (3). Drain valve (4).1. Use a copy of the enclosed form to record engine operation data prior to completing the turbo wash. The data should be compared to data recorded at commissioning. If the data is similar, turbocharger cleaning may not be necessary.2. On 3612 and 3616 Engines, wash one turbocharger at a time.3. Reduce engine load until the exhaust inlet temperature to the turbocharger is 375 10°C (707 18°F).4. Operate the engine at this reduced load for five minutes to insure the exhaust inlet temperature to the turbocharger is stable at 375 10°C (707 18°F) before proceeding to Step 5.5. Install water supply hose assembly (C) between the control module and two nipples (2) on the engine.
DO NOT OPEN THE TURBOCHARGER WASH VALVES. Opening the valves will allow hot exhaust gas to enter the water lines. This may directly result in damage to the lines and turbocharger wash control box and may cause personal injury to any person standing nearby. To avoid the hot exhaust gas, the turbocharger wash valves should not be opened at this time.
6. Install (drain) tube assembly (A) to nipple (3) on the same side of the engine.7. Insure that (flow control) needle valve (F) in the control module is FULLY CLOSED.8. Connect the customer-provided water supply to the control module at the nipple. Quick disconnect coupler (B) is provided.9. Turn on the water supply to the control module. Supply pressure should be more than 240 kPa (35 psi) but less than 1380 kPa (200 psi). Pressure