Case 300, 300B, 400B Series Tractor Service Manual

• Covers Case 300, 300B, 400B Wheel Tractors (Agricultural)
  • Including variants 301, 302, 310, 311, 312, 320
• P/N 9-92002
• 331 pages
• Downloadable PDF format
• 69mb file size
• Works with Windows/Mac/Tablet/Mobile

This downloadable service manual covers the Case 300, 300B, and 400B series agricultural tractors and provides the factory repair information needed to service, troubleshoot, and overhaul these classic machines. Digitally reproduced from the original dealer service manual, this edition is fully searchable and easy to use on a computer, tablet, or smartphone.

With more than 300 pages of detailed service procedures, specifications, illustrations, exploded views, and wiring diagrams, this manual is an essential resource for owners, restoration projects, and professional mechanics. Step-by-step instructions guide you through repairs to the engine, transmission, hydraulic system, steering, electrical components, front and rear axles, and the Case-o-Matic drive system.

Engine coverage includes complete service information for the G148 engine, including the cylinder head, cooling system, lubrication system, fuel system, governor linkage, pistons, crankshaft, camshaft, bearings, and clutch components. The manual also contains electrical troubleshooting procedures for both 6-volt and 12-volt systems, along with detailed wiring diagrams for multiple tractor configurations.

Additional sections cover transmission service, differential repairs, brakes, hydraulic pump testing, Eagle Hitch operation, power steering systems, front axle adjustments, and complete Case-o-Matic inspection and repair procedures. Detailed pressure checks, oil flow charts, adjustment specifications, and exploded component views help simplify complex repairs.

Whether you’re performing routine maintenance or a complete restoration, this factory service manual provides the technical information needed to get the job done correctly.

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Contents:

General Information

• Tractor Models
• Use of Manual
• Lubrication
• Torque Specification
• Special Tools
• Splitting Tractor

G148 Engine

• General Specification
• Service Hints
• Cylinder Head Assembly
• Timing Gear Cover
• Lubricating System
• Water Pump and Cooling System
• Clutch Assembly
• Camshaft
• Crankshaft
• Crankshaft Bearings
• Piston and Rod Assemblies
• Engine Sleeves
• Fuel System
• Governor Linkage
• L. P. Fuel System

Instruments and Electrical (6V and 12V)

• Instrument Cluster
• Case-o-Matic Gauges
• Speedometer and Tachometer
• Distributor
• Ignition Coil
• Adjusting Distributor Points –
• Ignition Timing
• Spark Plugs
• Starting Motor and Solenoid Switch
• Generator and Voltage Regulator
• Battery
• Wiring Diagram 400B
• Wiring Diagram 300 (Diesel ) 12V
• Wiring Diagram 300 (Gasoline) 6V

Torque Tube

• Main Drive Shaft
• Hydraulic Pump and Tachometer Drive
• Multiple Plate Clutch
• Belt Pulley

Transmission

• Specifications
• Service Hints
• Gear Shift Cover
• Reverse Idler Gear
• Main Drive Shaft
• Pinion Shaft
• Differential Assembly
• Differential Brakes
• Tripl Range Control Cover
• Tripl Range Assembly
• Shuttle Control Cover
• Shuttle Transmission

Rear Axle

• Removing Rear Axle

Front Axle

• Lubrication
• Bearing Adjustment
• Solid Front Axle
• Adjustable Front Axles
• Dual Front Wheels
• Steering Cam and Lever Housing
• Adjusting Cam and Lever
• Power Steering – Gasoline Utility Models
• Power Steering – General Purpose Models – Gasoline and L.P.G.
• Power Steering – Diesel Utility Models

Hydraulic System

• General Specifications
• Service Hints
• Hydraulic Pump
• Oil Flow Charts
• Interlock
• Control Unit
• Eagle Hitch
• Portable Cylinders and Hose Connections
• Testing Hydraulic System

Case-o-Matic Drive

• Function
• Oil Reservoir
• Oil Changing Procedure
• Oil Level Checking Procedure
• Reservoir Breather
• Case-o-Matic Oil Supply Pump
• Removing Adaptor Housing Assembly
• Servicing Converter Oil Filter
• Oil Cooler in Radiator
• Control Valve and Clutch Pressure Regulator
• Removing Valve from Adaptor Plate
• Control Valve Linkage Adjustment
• Converter Pressure Regulator
• Torque Converter Assembly
• Servicing the Multiple Plate Clutch
• Installing Clutch Drum in Torque Tube
• Installing Hydraulic Adaptor Housing
• Case-o-Matic Service Suggestions
• Case-o-Matic Pressure Checks
• Additional Checking and Service Information
• Exploded Views of Case-o-Matic Drive

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