Answer
Jul 28, 2025 - 01:21 AM
Nah... This manual is actually for the Cummins 4BT3.9 engine on its own, not the version used in Case machines. So while the 4-390 and 4BT3.9 are closely related (and sometimes even confused with each other), this manual won’t cover anything Case-specific like wiring, hydraulics, or integration with the tractor or loader systems.
If you're working on a Case machine with the 4-390, 4T-390, or 4TA390 engine, you’ll want the full Case-specific manual instead — that one’s right here 👉 Case 4-390, 4T-390, 4TA-390 Engine Service & Repair Manual
