Case 521G Touchscreen Wheel Loader Service Manual

A 521G is a production loader that lives in dirt, gravel, snow, and tight yard work, so downtime is expensive. This service manual is what I’d pull up when the touchscreen machine rolls in with a warning light, sluggish hydraulics, or a shifting issue and we need to trace the fault without guesswork. For example, if the loader won’t move and the dash is lit up, this book walks you through a logical path: check the basics, test the transmission controls, then isolate whether it’s electrical, hydraulic, or mechanical before you start stripping parts.

Applications & Use Cases

• Diagnose touchscreen and control faults by following step‑by‑step checks instead of swapping parts blindly.
• Plan disassembly and reassembly of driveline, axles, and brakes so components come off in the right order and go back aligned.
• Verify adjustments on linkages, brakes, and drivetrain after repairs to avoid repeat failures.
• Support hydraulic and 4WD troubleshooting, helping you trace pressure or engagement issues methodically.
• Set up a safe workflow so jacking, blocking, and lockout are done correctly before you crawl under the loader.

FAQ

Q: Can I use this manual on a tablet in the field?

A: Yes, it’s well suited for a tablet or laptop so you can zoom diagrams and follow steps right next to the machine.

Q: Is it worth printing sections of this manual?

A: I often print the specific procedures I’m doing that day, mark them up with notes, and keep them with the work order.

Safety Note

Always secure the loader, relieve stored pressure, and follow lockout/tagout before opening any drivetrain or hydraulic components.

Case 521G Touchscreen Wheel Loader Index:

INTRODUCTION
Engine – 10
Transmission – 21
Four-Wheel Drive (4WD) system – 23
Front axle system – 25
Rear axle system – 27
Brakes and controls – 33
Hydraulic systems – 35
Frames and ballasting – 39
Steering – 41
Wheels – 44
Cab climate control – 50
Electrical systems – 55
Lubrication system – 71
Front loader and bucket – 82
Platform, cab, bodywork, and decals – 90
SPECIAL TOOL INDEX

CNH