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Cummins 4B 3.9-Liter 4 Cylinder Engines for Kobelco Excavators

4B Cummins Engine

Kobelco Excavator Engines Overview

The Kobelco SK150 & Kobelco SK200 Excavators untilized the 4B Cummins Engine. The popular 3.9-Liter engine used in step van applications including bread, snack, uniform, and other commercial delivery vehicles from Oshkosh to Freightliners has been built specifically for these Kobelco Excavators. This 4B Cummins engine is also used in various industrial and construction applications. The 4B Cummins Engine are available in 2 different configurations listed below.  Most of the Kobelco Excavator engines will be on an Remanufacture & Return Customer Supplied engine.  

NPD utilizes torque plating methods for boring and honing to ensure block straightness, which reduces break-in time and crankcase pressure. In addition, NPD uses OEM or equivalent pistons, rings, bearings, valves and gaskets, 
making sure that this engine will stand the test of time.


Dynomometer Testing

All of NPD's Complete Drop-In engines are 100% dyno tested 
prior to shipment. Computer controls ensure that each 
engine dyno test is conducted under standard, 
repeatable settings. Every engine is run through a warm 
up cycle; three separate cruise segments simulating light, 
medium and heavy throttle conditions; maximum torque 
and horsepower tests; both high and low idle tests; and a 
black light leak detection test with dyed oil, coolant and fuel.


Long Block Supreme Includes

• Block

• Crankshaft
• Rods

• Oil pump
• Crank gear

• Cam gear
• Piston assemblies

• Camshaft
• Head

• Front gear cover
• Flywheel housing & seal

• Oil cooler
• Oil filter assembly
• Water pump

• Gasket set
• Valve train (lifters, pushrods & rocker arms)

Complete Drop-In Includes


All parts on the Long Block Supreme plus
• Lift pump

• Injection pump
• Low & high pressure lines

• Injectors
• Fuel filter  

• Damper pulley
• Turbocharger

• Thermostat
• Intake cover & connection

• Exhaust manifold
• Oil pan

• Oil pickup tube
• Gear cover & seal

• Sensors & switches
*shipped loose

Please be sure to view the Core Deposit that is associated with the engine you are ordering. The core deposit will need to be paid upfront before the engine(s) ships.

Freight Charges: Most of our Remanufactured engines include FREE Shipping both ways within the Continental United States.

Some of our Bare Long Blocks, Used & Reconditioned engines do have additional shipping fees. Please contact us for a freight quote.

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