CASE 21F, 121F, 221F, 321F Tier 4B (final) Compact Wheel Loader Service Manual (47829079B NA)

CASE 21F, 121F, 221F, 321F Tier 4B (Final) Compact Wheel Loader Service Manual – 47829079B (NA)

This technical service manual provides in-depth repair, diagnostics, and maintenance procedures for CASE 21F, 121F, 221F, and 321F compact wheel loaders operating under Tier 4B (Final) emission regulations. It features advanced system servicing, hydraulic and drivetrain diagrams, electrical troubleshooting guides, and covers all loader variants: XT, ZB, STD, and HS. This is the 2nd edition, superseding publication 47829079.

Model Covers:

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

North America

File Format: PDF

Size: 71.85 MB

No. of pages: 1,287

Language: English

Publication: 47829079B (2nd Edition, May 2015)

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

📑 Included Sections:

Engine

• Engine and crankcase disassembly, inspection, and reassembly procedures
• Fuel tank system access, cleaning, and line routing
• Tier 4B emission system compliance and diagnostics

Transmission

• Powershift external controls, clutch actuation, solenoid calibration
• Creeper gear mechanism inspection and servicing operations

Axles and Final Drives

• Front and rear axle teardown, inspection of bevel gear sets and differentials
• Planetary assemblies, final drives, hub carriers, and shaft alignments
• Steering knuckle wear checks, bearing preload settings

Brakes and Controls

• Hydraulic service braking system and component-level diagnostics
• Parking lock control and brake release logic
• Front axle-specific braking calibration and testing

Hydraulic Systems

• Main system layout and flow path identification
• Reservoir, filter, and cooling circuit servicing
• Fixed and variable displacement pumps, pressure checks and replacement
• Main valve block and pilot-operated systems: spool inspection and circuit logic
• Travel hydraulics, loader arm and bucket cylinders, quick coupler functions
• High-flow hydraulic system and auxiliary valve configuration

Frames and Ballasting

• Ballast support structures, frame inspection zones, crossmember configurations

Steering

• Hydraulic control valves, orbitrol unit, and pressure compensating components
• Steering cylinders servicing and stroke limit checks

Electrical Systems

• System architecture with harness diagrams, connectors, and terminal references
• Axle control electronics, HVAC interface, and instrument cluster testing
• Alarms, indicators, warning lamp logic and buzzer testing
• Diagnostic Trouble Code (DTC) list with failure analysis procedures

Cab and Bodywork

• Cab mounting points, structure overview, and platform component removal
• Body panel alignment, decal replacement, and visibility equipment maintenance

📑 Note: A revised version of this manual is available featuring additional systems for HVAC control, auxiliary hydraulics, hydrostatic drive, and loader bucket diagnostics. [Click here for more details.]

This CASE 21F / 121F / 221F / 321F Tier 4B Final Service Manual is a complete professional resource for workshop personnel responsible for diagnosing and servicing CASE compact wheel loaders in accordance with Stage IV emission regulations.