Engine for Case Models with 4B/4BT Cummins

Fits Models At A Glance:

Case Loader Backhoes:

• 480E
• 480F
• 580 Super E
• 580K
• 580 Super K
• 580L
• 580 Super L
• 590 Turbo
• 590 Super L
• 580M Series I — Before Serial Number N4C303000
• 580 Super M Series I — Before Serial Number N4C304000
• 590 Super M Series I — Before Serial Number N4C309000

Case Loader Landscapers:

• 480 LL
• 480F LL
• 570LXT
• 570MXT

Case Forklifts:

• 584E
• 585E
• 586E
• 585G
• 586G
• 588G

Case Crawler Dozers:

• 450C
• 455C
• 550
• 550E
• 550G
• 550H
• 650
• 650E
• 650G
• 650H
• 650K
• 750H
• 750K

Case Skid Steers:

• 1840
• 1845C
• 40XT
• 60XT
• 70XT
• 75XT
• 85XT
• 90XT
• 95XT

Case Wheel Loaders:

• W11B
• W14B

Case Trenchers:

• 660*
• 760*

Case Telehandlers:

• 686G

*Not for M-Series Backhoes or K-Series Dozers with an engine balancer — identify by a flat-bottom engine oil pan; this engine will not work in those applications.

Kit Includes:

• Oil Pan
• Oil Pump
• Water Pump
• Engine Oil Cooler
• Engine Block
• Loaded Cylinder Head
• Crankshaft
• Full engine gasket kit

Key Notes:

• Part Number: CS-4390-LB-N
• Weight: 590.00 lbs (267.62 kg)
• Engine Type: 4-cylinder, 4-stroke cycle, valve-in-head
• Firing Order: 1, 3, 4, 2
• Bore: 102 mm (4.02 in)
• Stroke: 120 mm (4.72 in)
• Piston Displacement: 3.92 liters
• Compression Ratio: 17.0 to 1
• No Load Governed Speed: 2,345–2,440 RPM
• Rated Engine Speed: 2,305–2,385 RPM
• Engine Idle Speed: 850–900 RPM
• Valve Tappet Clearance (Exhaust, Cold): 0.020 in (0.508 mm)
• Valve Tappet Clearance (Intake, Cold): 0.010 in (0.254 mm)
• Thermostat Operating Range: 181°F–203°F (83°C–95°C)
• Injector Tips: Uses 7mm injector tips (part 3280048); if your model uses older 9mm tips, new injectors are required — available separately
• Fuel Injection Pump Compatibility: Rotary-style pump requires no front cover change; inline-style pump requires a front cover swap, with instructions and gaskets included
• Not Included: Fuel system and electrical parts — available separately
• Core Charge: No core return required
• Shipping: LTL Truck Freight — additional charges apply for lift gate service

Rotary Style Fuel Injection Pump (No Cover Change Needed):

• 580L Series I — Before Serial Number JJG0239360
• 580 Super L Series I — Before Serial Number JJG0239360
• 590 Super L Series I — Before Serial Number JJG0210575
• 584E — Before Serial Number JJG0251722
• 585E — Before Serial Number JJG0251722
• 586E — Before Serial Number JJG0251722
• 550G — Before Serial Number JJG0255794
• 650G — Before Serial Number JJG0216449

Inline Style Fuel Injection Pump (Front Cover Swap Needed, Instructions and Gaskets Included):

• 580L Series II — After Serial Number JJG0239360
• 580 Super L Series II — After Serial Number JJG0239360
• 580M Series I — Before Serial Number N4C303000
• 580 Super M Series I — Before Serial Number N4C304000
• 590 Super L Series II — After Serial Number JJG0210575
• 590 Super M Series I — Before Serial Number N4C309000
• 584E — After Serial Number JJG0251722
• 585E — After Serial Number JJG0251722
• 586E — After Serial Number JJG0251722
• 550G — After Serial Number JJG0255794
• 650G — After Serial Number JJG0216449

Common Use Case or Symptoms:
Use when the engine is worn beyond economical rebuild — blown head gasket with block damage, spun bearings, cracked block, or excessive oil consumption and blow-by — and a complete new replacement engine is the better long-term investment than a rebuild.

Why Choose Broken Tractor:
✅ Complete New Engine, Not Just a Long Block — block, crankshaft, loaded cylinder head, oil pan, oil pump, water pump, and oil cooler all included with a full gasket kit
✅ No Core Return Required — simplifies your upgrade with no core deposit or return shipping hassle
✅ In Stock and Ready to Ship — ships via LTL freight from our Ohio warehouse