CASE 21F, 121F, 221F, 321F Stage IIIB Compact Wheel Loader Service Manual (47768535C EU)

CASE 21F, 121F, 221F, 321F Stage IIIB Compact Wheel Loader Service Manual – 47768535C (EU)

This technical service manual provides advanced diagnostic, repair, and maintenance procedures for CASE 21F, 121F, 221F, and 321F Stage IIIB compact wheel loaders. The documentation includes comprehensive system-level disassembly, calibration steps, hydrostatic and hydraulic servicing, and in-depth fault code analysis. Applicable to all major loader configurations including XT, ZB, STD, and HS models.

Model Covers:

121F XT, 121F ZB, 21F XT, 21F ZB, 221F HS, 221F STD, 321F HS, 321F STD

Europa

File Format: PDF

Size: 92.47 MB

No. of pages: 1,617

Language: English

Publication: 47768535C (March 2017)

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

📑 Included Sections:

Engine

• Crankcase structure, engine removal and reinstallation steps
• Fuel tank assembly and line routing for Stage IIIB configurations
• Emission compliance systems and integration with EU regulations

4WD and Axle Systems

• Front and rear axle disassembly: bevel gear sets, differentials, final drives
• Drive shafts, steering knuckles, and axle shaft servicing
• Planetary gear inspections and shaft preload adjustments

Hydrostatic Drive

• Transmission control systems for hydrostatic steering and travel
• Hydraulic drive motor calibration and fluid loop diagnosis

Brakes and Controls

• Service brakes, hydraulic assist components, parking lock integration
• Front axle braking systems and wear diagnostics

Hydraulic Systems

• Main circuit layouts, hydraulic reservoir, cooler, and filtration control
• Fixed and variable displacement pump configuration, service testing
• Control valve blocks, pilot logic, high-flow functionality and auxiliary systems
• Loader arm, bucket, travel, and quick coupler hydraulic circuits
• Manual and joystick hand control integration

Frames and Ballasting

• Chassis configuration, structural inspection zones, and ballast distribution
• Cab and loader frame mounting points, crossmember reinforcements

Steering

• Hydraulic steering control modules, orbitrol valves, and pressure specs
• Steering cylinder disassembly and rod wear checks

Cab Climate Control

• HVAC layout, heater core service, refrigerant flow circuit and valve regulation
• Electronic control system for cab environment and operator comfort

Electrical Systems

• Complete wiring schematics with connector ID and color coding
• Harness routing, front axle sensor systems, fuse and relay mapping
• HVAC electrical system integration and control logic
• Warning indicator matrix, alarms, and instrument calibration
• Diagnostic Trouble Codes (DTC): fault chart, symbol interpretation, troubleshooting flow

Front Loader Assembly

• Loader arm mechanism service, alignment and pivot bushing maintenance
• Bucket linkage geometry and cylinder pin clearance inspection

📑 What's New in the Updated Edition:

• Expanded coverage for HVAC systems and CAN-controlled modules
• Hydraulic quick coupler circuit updates and flow enhancements
• Detailed high-flow and pilot system diagnostics
• Electrical fault code mapping and connector updates 
[See the previous edition]

This CASE 21F / 121F / 221F / 321F Stage IIIB Service Manual is a critical reference for professional technicians responsible for maintaining compact wheel loaders under Stage IIIB emissions and advanced hydraulic-drive systems.