895013A02 Mercruiser HARNESS ASSEMBLY

Introduction
This Special Instruction provides the procedure in order to repower the tractor engine of a 651/657B Wheel Tractor-Scraper. The replacement engine for the tractor will be a Tier IIl level C15 Engine. The 651/657B wheel tractor was originally equipped with a D346 Engine. This Special Instruction will provide the information in order to install the Tier IIl level replacement engine.
Table 1
Engine Arrangement
Original Engine Replacement Engine
8S-6451 283-8658 This Special Instruction does not include procedures that can be found in your existing manuals. Refer to the original Service Manual, Parts Manual, and Operation and Maintenance Manual for more information.When you have completed this procedure, prepare the machine for service.Note: Do not perform any procedure in this Special Instruction until the information has been read and understood.Reference: Service Manual, Parts Manual, Operation and Maintenance Manual.Note: This instruction contains some procedures that come from dealer feedback. If errors are found, submit feedback in SIS Web or contact the Emissions Retrofit Group.Refer to the following: Service, Part, and Operation and Maintenance Manuals.
Disassembly and Assembly, RENR8261, C15 and C18 Engines for Caterpillar Built Machines
Parts Manual, SEBP4384, C15 Engine Emissions Retrofit Repower Tier III for 651B/657B
Special Instructions, REHS2628, Tier II Level Engine Repower for a 651B/657B Wheel Tractor-Scraper (Tractor)
Operations and Maintenance Manual Supplement, M0078106, 651B Tier II Repower OMM SupplementSafety
Personal injury or death can result from sudden machine movement.Sudden movement of the machine can cause injury to persons on or near the machine.To prevent injury or death, make sure that the area around the machine is clear of personnel and obstructions before operating the machine.
Do not attempt to assemble this machine until you read and you understand the assembly instructions.Improper assembly procedures could result in injury or death.
Personal injury or death can result from improper lifting or blocking.When a hoist or jack is used to lift any part or component, stand clear of the area. Be sure the hoist or jack has the correct capacity to lift a component. Install blocks or stands before performance of any work under a heavy component.Approximate weights of the components are shown. Clean all surfaces where parts are to be installed.
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting, and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Refer to Special Publication, NENG2500, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat® products.Dispose of all fluids according to local regulations and mandates.
Welding on Electronically Controlled Engines
Proper welding procedures are necessary in order to avoid damage to electronic controls. Perform welding on the engine according to the following procedure.
Set the engine control to the "STOP" mode.
Turn OFF the fuel supply to the engine.
Disconnect the negative terminal from the battery.
Disconnect the engines electronic components from the wiring harnesses: ECM, throttle actuator, actuator for the turbocharger compressors bypass, fuel metering valve and sensors.
Protect the wiring harnesses from welding debris and/or from welding spatter.
Do NOT use electrical components (ECM or sensors) or electronic component grounding points for grounding the welder.
Connect the welders ground cable directly to the component that will be welded. Place the clamp as close as possible to the weld in order to reduce the possibility of welding current damage to the engine bearings, to the electrical components, and to other engine components.
Use standard welding procedures to weld the materials together.Parts Needed
Note: The required parts are subject to some change. Refer to TMI for the most recent required parts list.
Table 2
Repower Parts
( 294-9579 Conversion Ar-Repower)
Qty Part Number Description
1 283-8658 Engine Ar
1 455-1802 Kit-Conversion (Repower) A breakdown of the kit provides a parts list for the repower. The kit part number is not serviceable. Order the engine arrangement plus the list of parts provided in the kit.
Table 3
New Parts for the Pump Drive
Qty Part Number Description