3859077 Volvo.Penta Nut

Duplex Oil Filter and Duplex Fuel Filter Systems
These two filter systems are available as attachments on 5.4" (137 mm) and 6.25" (159 mm) bore V-engines. These systems permit changing plugged filter elements without stopping the engine. Plugging of the elements can be determined by observing the oil filter change indicator or the fuel pressure gauge reading.
DUPLEX OIL FILTER SYSTEM
DUPLEX FUEL FILTER SYSTEMThe oil filter change indicator is located on the oil filter housing. When the indicator is raised approximately one half to two thirds the height of the viewing glass, the filter element requires changing. The fuel pressure gauge is mounted in the instrument panel. When the fuel pressure gauge registers in the OUT range (less than 20 PSI, or less than 1.4 kg/cm2) the fuel filters must be changed. For V-engines only, see the LUBRICATION AND MAINTENANCE PROCEDURES for detailed instructions for changing the filter elements.Engine Jacket Water Pump Failure
If the engine jacket water pump should fail, fresh water can be supplied to the engine jacket using the emergency water system.
6.25" (159 mm) Bore V-Engines Emergency Jacket Water Connections 1 - Tee Connector2 - Valve3 - Emergency Jacket Water Pump4 - Tee Connector5 - Valve or Plate 1. Stop the engine. If the water pump bearing has failed, the water pump need not be removed.2. Open valve (2).3. Loosen, move and secure valve, or plate, (5) in the EMERGENCY position.4. Start the emergency jacket water pump (3). Allow the air to escape from the emergency cooling system. Check the coolant level. Add fresh water as required.5. Start the engine.6. Engage the marine gear; operate the vessel at normal speed.If the fresh coolant water is lost (such as when a water line fails) and an insufficient supply is available to replenish the jacket water coolant while at sea, sea water may be pumped through the engine jacket if it is necessary.1. Stop the engine and make the necessary water pump and lines connections for pumping sea water into the jacket water system and back to the sea.2. Remove the temperature regulating thermostats from the regulator housing, and install the housing cover.3. Start the emergency pump and/or start the engine. The sea water should be pumped through the engine jacket and returned to the sea.4. With the governor control at low idle, engage the marine gear forward clutch.5. Operate the engine at the lowest speed for existing sea conditions.6. Maintain engine temperatures as slow as possible in order to minimize salt corrosion of engine parts and salt deposits in the engine.7. Upon reaching port, have the engine jacket water system completely disassembled, cleaned and inspected. Replace all parts which are corroded or damaged.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; start and warm the engine, engage the marine gear, and continue traveling at normal speed.Towing
If the vessel cannot continue under its own power, it is recommended that the vessel be towed. If pressurized oil cannot be supplied to the marine gear shaft bearings while being towed, the propeller shaft must be secured so as to prevent the turning shaft