Case 445/M2 445T/M2 668T/M2 Diesel Engine Service Manual 2003

Description

Case 445/M2, 445T/M2 and 668T/M2 Diesel Engine Service Manual – 6-74500

This is the complete service manual for the Case 445/M2, 445T/M2 and 668T/M2 diesel engines, published under part number 6-74500 in February 2003. It covers the four-cylinder and six-cylinder industrial engine range used across Case equipment, including the F4GE0404A, F4BE0484 and F4BE0684 engine variants. Whether you are working on a mechanically injected rotary pump engine or a mechanical in-line pump unit, this manual provides the procedures, specifications and clearance data needed to carry out the work correctly.

File Details

• Manual type: Engine service and repair manual
• Brand: Case
• Models covered: 445/M2, 445T/M2, 668T/M2
• Engine codes: F4GE0404A, F4BE0484, F4BE0684
• Part number: 6-74500
• Edition/Date: February 2003
• Language: English
• Page count: 180
• File format: PDF

Chapters Covered

• Section 1 – General information: engine range identification and model coding, lubrication system layout, cooling system layout, turbocharger and boost feeding
• Section 2 – Feed: injection feed system by mechanical rotary pump, feed pump (VE 4/12 1150L rotary type), priming pump, fuel filter, injection feed system by mechanical pump unit
• Section 3 – Duty / Industrial applications: general information, clearance data for 4- and 6-cylinder engines, mechanical components, electrical equipment, troubleshooting, maintenance planning and procedures
• Section 4 – Overhaul and technical specifications: engine removal at the bench, cylinder unit checks and measurements, timing system (camshaft, bushes, tappets), output shaft (journals, crankpins, main bearings), connecting rod and piston assembly, cylinder head, valves, valve guides and seats, tightening torque
• Section 5 – Equipment: special tool list with tool numbers
• Appendix – Installation guidelines and safety prescriptions

The manual is organised to take a technician from general engine identification all the way through to a complete bench overhaul. Section 1 explains the engine layout and the lubrication, cooling and turbocharger systems using diagrams and flow schematics, which is useful for understanding how the major circuits run before any disassembly begins. The lubrication section covers the oil rotary expansion pump, heat exchanger, oil filter and the routing of oil under pressure and return by gravity. The cooling section covers the centrifugal water pump, thermostat, heat exchanger, intercooler and the radiator circuit, with separate diagrams for 4-cylinder and 6-cylinder engines. The boost feeding section explains the turbocharger, wastegate valve operation and charge air cooling.

Section 2 deals with the fuel feed side in detail. It covers both the rotary VE pump arrangement and the mechanical in-line pump configuration, including the priming pump driven by the camshaft, the fuel filter assembly with water drain and optional heater, and the low-pressure circuit from tank to injection pump. The feed pump identification is explained, for example the VE 4/12 1150L code where 4 indicates four cylinders and 12 is the distribution plunger diameter in millimetres. The working principles of fuel suction, filtration, transfer pump pressurisation and delivery to the injectors are described, along with the return circuit.

The industrial application section is where the day-to-day service information sits. It splits the work into mechanical components, electrical equipment, troubleshooting and maintenance planning, with separate procedures for engines fitted with a mechanical rotary pump and those with a mechanical in-line pump. The overhaul procedures for application components, the rotary feed pump, the power take-off and the feed system bleed procedure are all included, along with tightening torques and clearance data for both four- and six-cylinder versions. The electrical section covers the cooling liquid temperature sensor, starter, KSB water temperature sensor, electromagnets on the feed pump, fuel heater, oil pressure switch, cold start resistor and alternator.

For anyone rebuilding an engine, Section 4 is the core of the manual. It walks through engine removal at the bench, repair operations on the cylinder unit including bore measurement and ovalisation checks, timing system checks including camshaft inspection, cam lift measurement and bush replacement, output shaft journal and crankpin measurement with undersize classes, connecting rod and piston assembly including piston pin fitting, split ring installation and piston protrusion measurement, cylinder head work including valve removal, valve guide and seat checking, valve spring testing and refitting, and the final tightening torques. The clearance data tables give the exact wear limits and assembly tolerances needed to judge whether a component can be reused or must be replaced.

Section 5 lists the special tools required for the job, with tool numbers such as 380000663 (crankshaft rear seal puller), 380000664 (crankshaft rear seal installer), 380000665 (crankshaft front seal puller), 380000666 (crankshaft front seal installer), 380000671 (injector puller), 380000979 (injector pump puller) and 380000988 (tool for rotating the engine flywheel). The appendix covers installation prescriptions and general safety requirements that must be followed during both installation and maintenance work, including precautions for handling engine oil, cooling liquid, fuel and electrical systems.

What This Manual Enables You To Do

With this Case 445/M2, 445T/M2 and 668T/M2 engine service manual, you can carry out a full mechanical overhaul of the four- and six-cylinder engines, diagnose fuel and electrical faults using the troubleshooting section, set valve clearances and injection pump timing, measure and assess cylinder bore wear, replace camshaft bushes and tappets, check connecting rod alignment and piston protrusion, and rebuild the cylinder head with the correct valve seat and guide tolerances. The maintenance planning tables give service intervals for oil and filter changes, fuel filter replacement, belt replacement and tappet clearance checks, so routine servicing can be scheduled properly rather than guessed at.

Correct specifications matter because these engines use interference fits, torque-plus-angle fasteners and closely controlled clearances. Reusing a component that is outside the wear limit, or tightening a cylinder head or connecting rod to the wrong figure, can lead to premature failure, poor performance or a repeat strip-down. Having the actual clearance data and tightening torque tables in front of you removes that guesswork.

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The manual is supplied as an instant PDF download. There is nothing to wait for and nothing to ship. You can open it on a workshop computer, tablet or phone, print only the pages you need for the job at hand, and keep the complete document as a permanent reference. After payment, the download link is available immediately.