CASE 621 Loader Service Manual

CASE 621 Loader Service Manual

This professional service manual provides full technical coverage for the CASE 621 Loader, including complete diagnostics, disassembly and assembly procedures, pressure checks, troubleshooting charts, and detailed system specifications. Structured for dealership technicians and experienced mechanics, it offers precise repair instructions for the engine, fuel system, power train, hydraulics, steering, brakes, electrical circuits, chassis assemblies and operator-station components. Comprehensive removal and installation procedures, schematics, wear limits, torque data and system flow diagrams support accurate repairs and full machine restoration.

Model Covers:

Case 621 Loader – All supported configurations

File Format: PDF

Size: 503.50 MB

No. of pages: 1381

Language: English

Delivery Method: Instant Download – Access your file immediately after purchase.

General Information

• Standard torque specifications
• Fluids and lubricants required for machine service
• Section index and general service references

Engine Systems

• Engine removal and installation procedures
• Radiator removal and installation
• Stall test procedures and performance checks
• Cylinder head and valve train service
• Cylinder block, crankshaft, pistons, rods, sleeves and bearings
• Camshaft, seals, flywheel and related components
• Lubrication and cooling system service
• Turbocharger servicing and failure analysis

Fuel System

• Fuel filtration components
• Injection pump service procedures
• Fuel injector testing and replacement

Electrical System

• Starter and alternator removal and installation
• Wiring schematics, specifications and troubleshooting routines
• Booster battery starting procedures
• Nippondenso starter and solenoid service
• Batteries, instrument cluster and gauge servicing
• Bosch 65-amp alternator testing and repair

Steering System

• Steering component removal and installation
• Steering system specifications and diagnostics
• Steering control valve service
• Row control valve procedures
• Steering cylinder disassembly and repair
• Center pivot service procedures
• Auxiliary steering motor and pump service

Power Train

• Power train removal and installation
• Transmission specifications, troubleshooting and schematics
• ZF transmission with Clark shifter – diagnostics and repair
• ZF transmission with ZF shifter – diagnostics and repair
• Differential and planetary gear servicing
• Drive shaft, center bearing and universal joint servicing
• Wheels and tires service notes
• Transmission control valve inspection and repair

Brakes

• Brake component removal and installation
• System schematics, troubleshooting and leakage tests
• Air compressor and governor service
• Brake valve, actuator and air drying system
• Pressure reducing and protection valves
• Drum and disc-type parking brake systems
• Goodyear and Carlisle disc brake systems

Hydraulics

• Hydraulic component removal and installation
• System specifications, schematics and pressure checks
• Hydraulic system cleaning and contamination control
• Hydraulic pump servicing
• Loader control valve inspection and overhaul
• Hydraulic cylinders servicing procedures
• Remote control valves and regulator valves
• Accumulator system service

Chassis and Operator Station

• Loader structural components and inspection
• ROPS cab and canopy removal and installation
• Seat and seat belt servicing
• Suspension seat adjustments and replacement
• Pedal and lever linkage repair

Air Conditioning System

• Air conditioning troubleshooting and performance testing
• System discharge and charging procedures
• Component removal and installation
• Compressor and clutch service

This CASE 621 Loader Service Manual is a complete workshop reference for precise diagnostics, component-level servicing and full mechanical restoration.