CUP-BEARING 6Y2547 - Caterpillar

Certain worldwide marine classification societies require seagoing propulsion engines to be equipped so as to allow continuous operation while oil and fuel filters are changed; or if the engine water pump or oil pump should fail; or if the marine gear oil pump should fail.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.