72645 Mercruiser SCREEN ASSEMBLY, OIL PUMP (898-200)

Introduction
This Special Instruction describes the rework procedure to convert "ADEM 3" to "ADEM 4" Electronic Control Module (ECM) on G3606 gas engines. The ADEM 4 electronic control improves performance and reliability by integrating the following functions:
Speed control
Air/Fuel ratio control
Ignition/Detonation controlThe ADEM A4 has following improved functionalities:
User interface
Display system
Shutdown control
System diagnosticsThe ADEM 4 is also known as A4.Whenever question arise about this product or about this Special Instruction, consult your local Caterpillar dealer for the latest available information.Do not perform any procedure in this Special Instruction until you have read the information and you understand the information.Note: All assembly procedure for complete disassembly and assembly are not in this Special Instruction. Refer to Disassembly and Assembly, SENR4259, "G3606 and G3608 Engines" for missing procedures. This Special Instruction assumes that you will be starting for an engine that will have crankshaft, liners, front and rear gear trains, flywheel, damper group, front and rear housings, oil pan and etc. already installed.Safety Section
Use only proper tools and observe all precautions that pertain to the use of those tools. Failure to follow these procedures can result in personal injury. The following procedures should also be observed.Work safely. Most accidents that involve product operation, maintenance, and repair are caused by failure to observe basic safety rules or precautions. An accident can often be avoided by recognizing potentially hazardous situations before an accident occurs.A person must be alert to potential hazards. This person should also have the necessary training, skills, and tools to perform these functions properly.Safety precautions and warnings are provided in this instruction and on the product. If these hazard warnings are not heeded, bodily injury or death could occur to you or to other persons. Caterpillar cannot anticipate every possible circumstance that might involve a potential hazard.Therefore, the warnings in this publication and the warnings that are on the product are not all inclusive. If the tools, the procedure, the work method, or your actions are not recommended by Caterpillar, ensure that the tools and your actions are safe for you and for others.Ensure that the product will not be damaged or the product will be made unsafe by the operation, lubrication, maintenance, or the repair procedures.Follow all safety warnings. Most accidents that involve product operation, maintenance, or repair are caused by failure to observe safety warnings. An accident can often be avoided by recognizing potentially hazardous situations before an accident occurs. Personnel should be properly trained to perform maintenance, repair, or operate any machine. Safety precautions and warnings are provided this instruction and on Caterpillar products. These warnings should be observed before performing any procedures. Caterpillar cannot anticipate every possible circumstance that might involve a potential hazard. The warnings in this publication and on the product are not all inclusive.
Do not operate or work on this product unless you have read and understood the instruction and warnings in the relevant Operation and Maintenance Manuals and relevant service literature. Failure to follow the instructions or heed the warnings could result in injury or death. Proper care is your responsibility.
Failure to follow all safety guidelines prescribed in this document and by governing authorities and regulatory agencies may result in severe injury or death of personnel or machine damage.
When removing a major component or attachment, ensure that it is properly blocked or secured before removing mounting hardware. An assembly that is disconnected without proper blocking may shift or fall, resulting in serious injury