Part of the New Holland Repair Manuals.
Need the factory specs for your diesel? This 567-page Case ISM Tier 4 Engine, N4LDI-TA-45SL, N4LDI-TA-50SL, N843LT-F-27, N843T-F-24, N844L-F-30, N844L-F-34, N844L-F-36SL, N844LT-F-45SL service manual pdf (OEM #47632293) breaks down the complete block, fuel injection setup, and EGR components. Inside, you get error code charts, and exploded views for the entire valve drive and gear assembly. Open to the troubleshooting section to diagnose selective catalytic reduction faults, or follow step-by-step procedures to rebuild the crankshaft and flywheel. Snug the head bolt to 48-52 N-m (35-38 lb ft) before turning an additional 120-180 degrees, and confirm you have exactly 12.0 V at Pin 1 on the fuel pump connection. Every hour in the shop costs money. Download this bookmarked file directly to your phone or laptop, jump straight to the spec you need, and get the repair done right.
What's Inside This Case N843/N844 Series Manual
| System | Pages | Key Topics |
|---|---|---|
| Introduction | 7-20 | Foreword - Ecology and the Environment, Safety Rules, Basic Instructions - Important Notice Regarding Equipment Servicing, Basic Instructions - Shop and Assembly |
| Engine Mechanical (Cylinder Head, Block & Crankcase) | 21-120 | Cylinder Head, Cylinder Block, Crankcase, Pan and Covers, Gaskets and Seals, Valve Mechanism |
| Crankshaft, Pistons & Connecting Rods | 121-190 | Crankshaft, Main Bearings, Pistons, Piston Rings, Connecting Rods, Flywheel |
| Lubrication & Cooling Systems | 191-250 | Oil Pump, Oil Filter, Lubrication Circuit, Water Pump, Thermostat, Cooling Circuit |
| Fuel Injection, Air Intake & Exhaust | 251-332 | Fuel Injection Pump, Injectors, Fuel Filter, Turbocharger, Intake Manifold, Exhaust Manifold, EGR |
| Electrical System & Wiring Diagrams | 333-410 | Wiring Diagrams, Harnesses, Connectors, Fuses and Relays, Grounds |
| Engine Control Unit & Sensors | 411-490 | ECU, Engine Control Module, Sensors, Actuators, Fault Codes, Diagnostics |
| Starting & Charging System | 491-565 | Starter Motor, Alternator, Battery, Glow Plugs, Charging Circuit |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Fuel filters | 10.8 | p. 3 |
| Alternator | 55.4 | p. 3 |
| Fuel filters - Replace | tighten by hand about 3/4 turn | p. 186 |
| Fuel pump electrical wiring/connection specification: Pin 1 | 12.0 V | p. 208 |
| Fuel pump electrical wiring/connection specification: Pin 2 | Ground | p. 208 |
| Torque bolts (1) and (7) | 23 - 28 N·m (17 - 21 lb ft) | p. 264 |
| Torque all bolts | 23 - 28 N·m (17 - 21 lb ft) | p. 267 |
| Alternator - General specification - Manufacturer | Mitsubishi | p. 456 |
| Engine Oil Capacity (with filter) | 7.1 L (7.5 US qt) | p. 27 |
| N4LDI-TA-45SL, N4LDI-TA-50SL, N843LT-F-27, N843T-F-24, N844L-F-30, N844L-F-34, N844L-F-36SL, N844LT-F-45SL | ||
| Head bolt | Snug torque 48 - 52 N·m (35 - 38 lb ft) after that 120 - 180° | p. 26 |
| N4LDI-TA-50SL, N4LDI-TA-45SL | ||
| Engine Dry Weight | 206 kg (454.2 lb) | p. 27 |
| N844L-F-36SL, N844LT-F-45SL | ||
| Engine Dry Weight | 227 kg (500 lb) | p. 28 |
Case N843/N844 Series Common Problems This Manual Covers
Case ISM Tier 4 Engine fuel rail pressure lower than desired target with power loss or rough running
Inspect the common rail components and fuel system for leaks as shown on page 208. Test the low-pressure fuel pump electrical connection at Pin 1 to verify it receives 12.0 V. Replace the fuel filter and tighten by hand about 3/4 turn according to page 186.
Manual Section: Fuel injection system - Inspect p. 208Battery voltage incorrect accompanied by slow engine cranking, electrical system faults, or improper charging conditions
Test the alternator output and verify the adjusting voltage measures 14.5 - 15.0 V as specified on page 456. Check the wiring harness for corrosion. If the voltage drops below this range, replace the alternator and verify the new unit restores proper charging system function.
Manual Section: Engine TroubleshootingActive error code 3981 ECU memory failure triggering engine crank speed fault and intermittent shutdown
View active diagnostic codes using the computer support tools procedure. Clear the logged codes and attempt to restart. If the memory failure persists, reload the engine dataset. Verify the crankshaft pulley torque measures 274 - 333 N·m (202 - 246 lb ft) on page 26.
Manual Section: Electrical system Computer support tools - View - Diagnostic codesAmber fault code 39
Frequently Asked Questions
What aftertreatment technologies are required to meet Tier 4 Final regulations?
The manual indicates that the engine utilizes Exhaust Gas Recirculation (EGR), Diesel Oxidation Catalyst (DOC), and Diesel Particulate Filter (DPF) as aftertreatment technologies. The EGR valve recirculates exhaust gas to reduce NOx, while the DOC oxidizes HC and CO2, and the DPF collects and removes particulate matter. p. 252
How to reset Tier 4 engine error codes?
To clear Diagnostic Trouble Codes (DTCs), stop the engine and turn the ignition switch to the ON position. Then, click the "Clear" button on the DTC screen to clear highlighted codes or the "Clear All" button to clear the entire list of logged codes. p. 357
How to reset Tier 4 DPF aftertreatment system?
To reset the Diesel Particulate Filter (DPF) soot load, select the "Service" menu in the Service Tool D, then click "DPF Soot Load Reset". After that, click the "Reset" button to complete the operation. This procedure is used when the DPF is cleaned or replaced. p. 414
How to reset Tier 4 engine maintenance timer?
To reset the EGR maintenance time 1, select this function on the utility item selection screen. Follow the displayed instructions, which typically involve confirming the reset action. p. 381
What format is this Case ISM Tier 4 Engine & variants manual in?
You get a 567-page searchable PDF that downloads instantly after checkout. Open it on your laptop, tablet, or phone, and bring it right to the shop floor.
Are there any print restrictions on this Case ISM Tier 4 Engine & variants?
Yes, print as many copies as you want, and there are no restrictions. Many mechanics print the section they need and bring it to the shop floor.
Does this Case ISM Tier 4 Engine & variants manual include wiring diagrams?
No, wiring diagrams are referenced as external documents (page 559) and are not included in this manual.
