Case Models 400D Harvester Service Manual (IH-10)

These 400D harvesters usually live in dust, chaff, and mud, working long days in the field then sitting outside all off‑season. This service manual helps you trace problems methodically instead of guessing—start at the simple checks, then work deeper. Say the engine starts hunting under load: you’d follow the fuel system section to inspect filters, trace lines, test the pump, and verify the governor before you ever touch the injection pump settings.

Applications & Use Cases

• Track down a no-start by checking fuel delivery, bleed points, and basic ignition steps in order, so you isolate whether it’s fuel, air, or mechanical.
• Sort weak hydraulics by testing pressures with simple checks, tracing leaks, and verifying valve function before you tear into the pump.
• Chase overheating issues by inspecting airflow, routing and tension of belts, and testing thermostat and water pump instead of just throwing on a new radiator.
• Clean up brake or clutch problems by checking linkage wear, alignment, and adjustment sequences so they grab evenly and don’t drag.
• Plan off-season maintenance with structured inspection routes for belts, pulleys, bearings, and cooling so the machine’s ready when the crop is.

FAQ

Q: Is this a PDF I can search on my laptop or phone?

A: Yes, it’s typically a searchable PDF, so you can jump straight to sections like brakes or cooling without scrolling forever.

Q: Can I print just a few pages to take out to the field?

A: You usually can; most folks print the relevant procedures and keep them in a binder or plastic sleeve on the machine.

Safety Note

Always support raised headers and heavy components with proper stands before you crawl under to inspect or test anything.

Case Models 400D Harvester Index:

BELT PULLEY

BRAKES

CARBURETOR (Not LP-Gas)

CARBURETOR (LP-Gas)

CLUTCH, ENGINE

COOLING SYSTEM
Fan
Radiator
Water Pump

DIESEL FUEL SYSTEM
Air Restriction Valve
Energy Cells
Filters and Bleeding
Injection Pump
Nozzles
Precombustion Chambers
Quick Checks
Trouble Shooting

DIFFERENTIAL

ENGINE
Cam Followers
Camshaft
Connecting Rods and Bearings
Crankshaft
Cylinder Head
Engine Removal
Flywheel
Ignition Timing
Injection Timing
Main Bearings
Oil Pump
Pistons and Rings
Piston Pins
Piston Removal
Rear Oil Seal
Rocker Arms
Timing Gear Cover
Timing Gears
Valves and Seats
Valve Guides and Springs
Valve Timing

FINAL DRIVE
Axle Shafts
Bull Gears
Bull Pinions

FRONT SYSTEM
Axle Main Member
Steering Knuckles
Tie Rods and Drag Link
Tricycle Type

GOVERNOR

HYDRAULIC SYSTEM
Control Valves
Lubrication
Pump
Regulator and Safety Valve
Testing
Trouble Shooting

POWER STEERING SYSTEM
Cylinder
Flow Control and Relief Valve
Lubrication and Bleeding
Motor
Pump
Steering Gear
Steering Valves

PTO (Non-Continuous)

PTO (Independent Type)
Drive Shaft
Driven Shaft
Extension Shaft
Overhaul Rear Unit
Reactor Bands

REAR AXLE

STEERING GEAR (Manual)

TORQUE AMPLIFIER
Clutch Adjustment
Clutch Overhaul
Planetary Unit

TRANSMISSION OVERHAUL

Develon