Case SR270B, SV340B, TR340B, TV450B Tier 4B Final Stage 4 B Series Compact Track Loader Service Manual

These B Series loaders live in dirt, demolition, and feedlots all day, so when something quits—hydraulics get weak, a track won’t stay on, or the Tier 4B engine derates—you need a clear path to sort it out. This service manual is what I’d use to trace a fault from the cab controls right down to a valve or sensor, then strip, inspect, and reassemble the parts without guessing. For example, if the machine throws an emissions warning and loses power, this book walks you through the checks to verify if it’s a sensor, wiring, or a plugged component before you start replacing expensive hardware.

Applications & Use Cases

• Diagnose hydraulic issues like slow lift/tilt by following step-by-step tests instead of swapping parts at random.
• Trace electrical faults from fuses and relays to individual connectors, helping isolate shorts and bad grounds.
• Disassemble and reassemble major components—boom, drive, undercarriage—with a logical sequence that prevents damage.
• Adjust controls and linkages so joysticks, pedals, and auxiliary circuits respond correctly after repairs.
• Plan safe teardown workflow in a small shop or on-site, knowing what to support, cap, or bleed before you loosen anything.

FAQ

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

A: Yes, it’s practical to keep it on a tablet or laptop so you can zoom diagrams and search procedures right next to the machine.

Q: Is it worth printing sections of this manual?

A: Definitely—printing the pages for the system you’re working on keeps your device clean and lets you mark notes as you test and adjust.

Safety Note

Always depressurize hydraulic and fuel systems and secure raised components before you loosen, remove, or test any parts.

Case SR270B, SV340B, TR340B, TV450B Tier 4B Final Stage 4 B Series Compact Track Loader Index:

Contents
INTRODUCTION
Engine – 10
Power coupling – 19
Front axle system – 25
Rear axle system – 27
Hydrostatic drive – 29
Hydraulic systems – 35
Frames and ballasting – 39
Wheels – 44
Tracks and track suspension – 48
Cab climate control – 50
Electrical systems – 55
Front loader and bucket – 82
Platform, cab, bodywork, and decals – 90
SPECIAL TOOL INDEX

CNH