Part of the Case Repair Manuals.
Every one of the 180 pages in this Case 445/M2, 445T/M2, 668T/M2 Service Manual PDF (OEM #6-74500NA) is built for one job: bringing these diesel engines back to factory spec. Inside: full overhaul procedures for both the mechanical rotary pump and in-line pump versions, feed system bleeding steps, clearance data for the 4-cylinder and 6-cylinder blocks, and a dedicated troubleshooting section for engine anomalies. You also get torque tables, maintenance planning charts, and the special tool list for seal pullers and injector removal. Set working valve slack at 0.30 mm on the suction side and 0.55 mm on exhaust, then pull the M12 x 70 head bolts to 50 Nm plus a 90-degree turn. Guessing on head bolt torque is how gaskets fail twice. This bookmarked PDF opens on any device; take it to your bench and start wrenching.
What's Inside This Case 445/M2, 445T/M2, 668T/M2 Manual
| System | Pages | Key Topics |
|---|---|---|
| Content of Sections | 4-11 | General Information, Feed, Duty-Industrial Applications, Overhaul and Technical Specifications, Equipment, Appendix |
| General Specifications | 12-23 | Engine ID Code, Specific Engine Code, Lubricating Circuit, Oil Vapour Recirculating System, Cooling Circuit System, Boost Feeding Diagram |
| Feed | 24-35 | Injection Feed System, Rotary Pump, Feed Pump, Priming Pump, Fuel Filter, Mechanical Pump Unit |
| General Information and Clearance Data | 36-41 | Mechanical Feed Pump, Clearance Data, 4-Cylinder Engine Specs, 6-Cylinder Engine Specs |
| Overhaul of Engine with Mechanical Rotary Pump | 42-73 | Engine Disassembly, Application Components, Rotary Pump Disassembly, Feed System Bleed, Power Take-Off |
| Overhaul of Engine with Mechanical In-Line Pump | 74-107 | In-Line Pump Disassembly, Engine Assembly, Feed System Bleed, Power Take-Off, Tightening Torque |
| Electrical Equipment | 108-117 | Electrical Component Layout, Cooling Liquid Temperature Sensor, Starter, Ksb Water Temperature Sensor, Alternator |
| Troubleshooting and Maintenance Planning | 118-135 | Engine Anomalies, Troubleshooting, Maintenance Planning, Daily Checks, Maintenance Procedures |
| Overhaul and Technical Specifications | 136-171 | Cylinder Unit, Timing System, Output Shaft, Connecting Rod-Piston Assembly, Valves, Valve Springs |
| Tools | 172-175 | Crankshaft Rear Seal Puller, Crankshaft Rear Seal Installer, Crankshaft Front Seal Puller, Crankshaft Front Seal Installer, Injector Puller, Injector Pump Puller |
| Appendix | 176-180 | Standard Safety Prescriptions, Prevention of Injury, During Maintenance, Respect of the Environment |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Thermostat start of opening | 81±2 °C | p. 40 |
| M12 x 70 bolt torque | 50 Nm + 90 deg | p. 61 |
| M12 x 140 bolt torque | 40 Nm + 180 deg | p. 61 |
| Suction valves working slack | 0.30 ± 0.05 mm | p. 93 |
| Exhaust valves working slack | 0.55 ± 0.05 mm | p. 93 |
| Oil bypass valve into lube filter head | 80 ± 8 Nm | p. 106 |
| Fuel pump assembly M8 screw | 24 ± 4 Nm | p. 106 |
| Fuel pump assembly M6 screw | 10 ± 1 Nm | p. 106 |
| KSB Water temperature sensor setting contact opening | 32±2 °C | p. 111 |
| Fuel filter replacement torque | 5-10 Nm | p. 133 |
| Alternator current delivered | 90A | p. 113 |
