VALVE AS 1W4009 - Caterpillar

EngineG3512E (S/N: SSR1-UP; NGS1-UP)G3520C (S/N: GZJ600-UP)G3520E (S/N: GZE1-UP)Introduction
Do not perform any procedure in this Special Instruction until you read this information and you understand this information.This Special Instruction provides the following information for G3500C and G3500E Engines:
Requirements for the electrical system
Proper grounding practices
Proper welding practices
Required service tools
Electrical components and electronic components
Wiring connections and the corresponding functions that are available to the customer
Initial start-up procedure
Governor adjustment proceduresReference: Information from the following sources will be needed for this Special Instruction:
Data from a complete fuel analysis using Gas Rating Pro (GERP).
The engine performance Data Sheet from the engine Technical Marketing Information (TMI)
Operation and Maintenance Manual, SEBU7681
Systems Operation/Testing and Adjusting, RENR5978, "G3520C and G3520E Generator Set Engines"
Systems Operation/Testing and Adjusting, KENR9737, "G3512E and G3520E Generator Set Engines"
Systems Operation/Testing and Adjusting, SENR5832, "Electronic Modular Control Panel II+ (EMCPII+)"
Troubleshooting, RENR5944, "G3520E Generator Set Engines"
Troubleshooting, RENR5979, "G3520C and G3520E Engines"
Troubleshooting, KENR9738, "G3512E Generator Set Engines"Requirements for the Electrical System
All of the wiring must conform to all of the codes that are applicable to the site. When you route the wiring, avoid acute bends and sharp edges. To protect the wiring harnesses, route the harnesses through metal conduit. A liquid tight conduit is recommended. Use proper support and alignment to avoid strain on the conduit.Electrical power must be supplied to the junction box that serves as the main distribution panel for the engine control system. The engine control system requires a clean 24 VDC power supply capable of supplying 30 A of continuous power.The maximum allowable ripple voltage is 150 mV AC peak to peak. For the wiring, the maximum allowable voltage drop is 1 VDC from the power supply to an Electronic Control Module (ECM) or to an actuator.The power supply for the engine control system must be separate from the power supply for the starting motor.Grounding Practices
Proper grounding is necessary for optimum engine performance and for reliability. Improper grounding will result in electrical current paths that are uncontrolled and unreliable.Uncontrolled electrical circuit paths can result in damage to main bearings, to crankshaft bearing journal surfaces, and to aluminum components. Uncontrolled electrical circuit paths can also cause electrical activity that may degrade the engine electronics and communications.
For the starting motor, do not attach the battery negative terminal to the cylinder block.
Use an electrical ground strap to connect all metal cases that contain electrical components or electronic components to the cylinder block.
Do not connect the negative terminal from the electrical power supply directly to the cylinder block. Connect the negative terminal from the electrical power supply to the negative terminal "−" on the engine mounted junction box.
Ground the cylinder block with a ground strap that is furnished by the customer. Connect this ground strap to the ground plane.
Use a separate ground strap to ground the battery negative terminal for the control system to the ground plane.
Rubber couplings may connect the steel piping of the cooling system and the radiator. The rubber isolates the piping and the radiator. Ensure that the piping and the radiator are continuously