CASE 521G Tier 4B (Final) Wheel Loader Service Manual (51428262)

Detailed factory service manual for the CASE 521G Tier 4B Final Wheel Loader, covering all major North American configurations (ZBAR-EH, XT-EH, XR-EH). It includes emissions systems (SCR and EGR), pilot hydraulics, full CAN-bus diagnostics, HVAC controls, powertrain, and loader-mounted equipment with schematic support.

Model Covers:

CASE 521G ZBAR-EH Tier 4B Final Wheel Loader (New Cab – NA)
CASE 521G XT-EH Tier 4B Final Wheel Loader (New Cab – NA)
CASE 521G XR-EH Tier 4B Final Wheel Loader (New Cab – NA)

Note: This extended service manual covers EH-configured CASE 521G Tier 4B Final wheel loaders, including XR, XT, and Z-BAR variants with pilot hydraulics, CAN-bus integration, HVAC logic, cab camera systems, and full SCR/EGR aftertreatment coverage. It is the most complete diagnostic and repair guide for electronically controlled Tier 4B machines.

For earlier Tier 4B units without EH loader systems or advanced cab interfaces, refer to the standard CASE 521G Tier 4B Service Manual
👉 48083735.

For pre-emissions mechanical units, use the CASE 521G Tier 2 Service Manual
👉 48083739.

To identify exact part numbers, exploded diagrams, and component assemblies, refer to the CASE 521G Tier 4B Parts Catalog
👉 View Catalog.

If you're servicing European Stage IV machines with regional emission modules and logic, consult:

• CASE 521G Stage IV Manual 👉 51428203
• CASE 521G Stage IV Manual 👉 48082189

File Format: PDF

Size: 104.25 MB

No. of pages: 2831

Language: English

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

📑 Table of Contents Overview:

Engine & Emissions

• Crankcase, air intake, SCR exhaust treatment, EGR control
• Cooling system, fan and aftercooler, lubrication system

Transmission & Drivetrain

• Powershift transmission (external & internal), 4WD system
• Front/rear axles, final drives, bevel gears, planetary hubs

Brakes & Steering

• Hydraulic service brakes, parking brake/lock, auxiliary steering
• Hydraulic control components, cylinders

Hydraulic System

• Main and pilot systems, loader arm/bucket control
• Hydraulic fan drive, quick coupler, filters and reservoir

Electrical & Diagnostics

• Harnesses and connectors, starter, alternator, battery
• SCR/EGR logic systems, fault codes (DTC), loader joystick controls
• Camera system and HVAC electrical diagnostics

Cab, Climate & Mounted Equipment

• New cab with ROPS/FOPS, mechanically and pneumatically adjustable seats
• Air conditioning, control panel interface, decals, shields

Schematics

• Electrical Schematic
• Hydraulic Schematic

This CASE 521G Tier 4B Final Service Manual is optimized for high-level technicians servicing emission-regulated loaders across North America.