Part of the Case Repair Manuals.
The Case N843 and N844 series service manual PDF (OEM 47632257) takes all seven variants of this diesel engine family from compression test through final assembly across 316 pages. Wiring diagrams for the starting circuit, alternator, cold start aid, and injection controls fill roughly the last third of the book. Ahead of that electrical section, teardown procedures work through cylinder heads, rods and pistons, crankshaft and flywheel, and balancer backlash adjustment, each closing with inspection limits you can measure against. Check main bearing clearance to the 0.035 to 0.083 mm standard before ordering shells, then run the head bolts down to 98 to 103 N·m in the printed sequence. Guess at a journal and you pay for the teardown twice. Print the chapter that matches what is on the stand, let those pages take the oil, and keep the bookmarked, text searchable master clean for the next rebuild.
What's Inside This Case N843 and N844 Series Manual
| System | Pages | Key Topics |
|---|---|---|
| Service Manual | 1 | Engine, Electrical Systems, Fuel Injection System, Cooling System, Lubrication System |
| Introduction | 3-8 | Foreword, Foreword - Important Notice Regarding Equipment Servicing, Safety Rules, Safety Rules - Ecology and the Environment |
| Engine and Crankcase | 9-30 | General Specifications, Torque, Compression Test, Port Block Removal, Troubleshooting |
| Pan and Covers | 31-38 | Engine Oil Pan, Timing Gear Housing, Inspection, Installation |
| Valve Drive and Gears | 39-62 | Rocker Arm, Camshaft, Valve Seats, Tappets, Push Rods |
| Cylinder Heads | 63-84 | Cylinder Head Disassembly, Valve Inspection, Head Gasket Selection, Installation |
| Connecting Rods and Pistons | 85-102 | Piston Rings, Connecting Rod Inspection, Piston Pin Bushings, Bearing Inspection |
| Crankshaft and Flywheel | 103-124 | Flywheel Removal, Crankshaft Oil Seal, Main Bearings, Crankshaft Inspection |
| Balancer and Damper | 125-130 | Balancer Removal, Balancer Installation, Shims, Backlash Adjustment |
| Pump Drives, Fuel Injection, Turbocharger, Manifolds, Cooling, Lubrication | 131-220 | Crankcase Gears, Fuel Injection Pump, Turbocharger, Intake/Exhaust Manifolds, Cooling System, Lubrication System |
| Electrical Systems | 221-316 | Cab Engine Controls, Engine Starting System, Alternator, Cold Start Aid, Fuel Injection System, Engine Cooling System, Engine Oil System |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Cylinder head bolts | 98 - 103 N·m (72.3 - 76 lb ft) | p. 16 |
| Crankshaft bearing clearance standard | 0.035 - 0.083 mm (0.0014 - 0.00327 in) | p. 87 |
| Crankshaft bearing clearance maximum | 0.2 mm (0.008 in) | p. 49 |
| Piston diameter standard | 83.948 - 83.963 mm (3.30503 - 3.30562 in) | p. 88 |
| Piston diameter minimum | 83.7 mm (3.2953 in) | p. 88 |
| Piston ring end gap 1st ring maximum | 1.0 mm (0.039 in) | p. 153 |
| Piston ring end gap 2nd ring maximum | 1.0 mm (0.039 in) | p. 153 |
| Connecting rod bearing standard assemble value | 0.035 - 0.085 mm (0.001 - 0.003 in) | p. 87 |
| Pin-to-bushing clearance standard | 0.01 - 0.025 mm (0.00039 - 0.00098 in) | p. 88 |
| Pin-to-bushing clearance maximum | 0.08 mm (0.0031 in) | p. 43 |
| Oil clearance limit | 0.2 mm (0.0078 in) | p. 116 |
| Bushing dimension A | 12.5 mm (0.492 in) | p. 116 |
