Case Magnum 250 – 340 FPS T4B Systems and Diagnostics Service Training Manual

These Magnum tractors spend their lives on heavy tillage, planting, and hauling in dusty, high-load conditions, so when an FPS or Tier 4B emissions issue pops up, you need more than guesswork. This training manual helps you understand how the systems think, so you can trace faults logically instead of just swapping parts. For example, if the tractor derates and throws an emissions-related warning, this book helps you reason through what the control system is trying to protect, and how to verify whether the problem is sensor feedback, wiring, or a genuine engine-load issue.

Applications & Use Cases

• Build a mental picture of how the FPS and T4B systems interact so you can isolate faults faster.
• Improve your use of diagnostic tools by understanding what each value or code is really telling you.
• Train new technicians to follow a structured troubleshooting path instead of “parts darts.”
• Verify whether a symptom is likely electronic, hydraulic, or mechanical before tearing into components.
• Plan more accurate repair times and parts needs by understanding likely failure chains.

FAQ

Q: Is this useful if I already have the regular service manual?

A: Yes, this complements it by explaining system behavior and diagnostic logic, not just basic repair steps.

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

A: Typically yes; most techs keep a digital copy for quick searching, then print key pages they want at the tractor.

Safety Note

Always lock out, block, and depressurize systems before applying any diagnostic or testing methods from this training material.

Case Magnum 250 – 340 FPS T4B Systems and Diagnostics Index:

Profile and Test
Workbook
Overview
Controls & Displays
Electrical
Electrical Schematics
SCR T4B
General Hydraulics
Hydraulic Schematics
Hitch
PTO
Transmission
Engine
Tracks
FTPH PTO
Axle
Brakes

CNH