PUMP GP-PISTON 3849439 - Caterpillar

Engine Sea Water Pump Failure
The sea water pump circulates sea water through the engine jacket water heat exchanger. On turbocharged-aftercooled engines, the sea water also cools the aftercooled air. If the sea water pump should fail:
1 - Valve - normally closed2 - Emergency sea water pump3 - Emergency sea water inlet4 - Valve - normally closed5 - Emergency sea water strainers6 - Normal - operation sea water strainers7 - Normal - operation sea water inlet8 - Valve - normally open9 - Sea water pump10 - Jacket water heat exchanger11 - Sea water outlet12 - Aftercooler1. Stop the engine. If the shaft bearing has failed, the damaged pump need not be removed.2. Close the inlet valve (8) to the sea water pump.3. Open the inlet valve (4) to the emergency sea water pump.4. Start the emergency sea water pump (2).5. Start the engine, engage the marine gear, and continue at normal speed.Engine Lubricating Oil Pump Failure
If the engine oil pump fails, oil pressure will drop and the engine water temperature gauge readings may be above normal. If equipped, the shutoff controls will stop the engine.To use the emergency lubricating pump: 1. Move the marine gear selector lever to the NEUTRAL position, and stop the engine.2. Check the engine oil level. Maintain the level at the FULL mark on the dipstick.3. Reset the oil pressure shutoff control. Start the standby lubricating pump (3).
TYPICAL STANDBY OIL SYSTEM 1. Oil Pan2. Oil Strainer3. Standby Lubricating Oil Pump4. Check Valve5. Oil Cooler6. Engine Oil Filter7. Engine Lube Pump4. Observe the oil pressure gauge; be sure the oil pressure shutoff control reset knob has turned to the RUN position. Start the engine.5. Engage the marine gear; operate the vessel at normal speed.Marine Gear Oil Pump Failure
Marine gears have a lubrication system which is independent from the engine lubrication system. The Caterpillar 7200 Series Marine Gears may be equipped with an emergency lubricating oil system, as shown in the illustration, which can provide proper lubrication to the marine gear should the marine gear oil pump fail.
1. Emergency Lube Oil Valve2. Marine Gear Case3. Tapped Holes In Marine Gear Case4. Strainer5. Emergency Lube Oil Pump6. Output FlangeWhen the marine gear oil pump fails, engagement of the clutches will become sluggish and the clutch plates will slip or disengage. The shaft bearings will not receive pressure lubrication.To use the emergency marine gear oil pump:1. Stop the engine.2. Loosen, move and bolt the handle of the emergency valve into the EMERGENCY position. 3. Start the emergency lube oil pump (5).4. Observe the reading of the marine gear oil pressure gauge.5. Check the marine gear oil level with the emergency pump running.6. Maintain the oil level at the FULL mark on the dipstick.7. If the engine is not to be started (if the vessel is going to be towed by another vessel) the propeller can now windmill in the water without causing damage to the marine gear shaft bearings.8. If the vessel is to continue under its own power;