Komatsu Excavator Engine

Komatsu Excavator Engine parts list
Fits Model	Description	Details	Price	Product Details
See Details	PC75R-2, PC80MR-3, PW75R-2	Engine Oil Pump	129900-32001	$52.00	View Info
See Details	4D102	Engine - Long Block (New)	KM-4D102-LB-N	From $4,984.00	View Info
See Details	6D102	Long Block PLUS (New)	0	KM-6D102-LB-N	Call for Pricing	View Info

New long block engine assemblies for Komatsu excavators powered by 4D102 and 6D102 diesel engines, covering a broad range of Komatsu compact and full-size excavator models across multiple generations.

Fits Models At A Glance

4D102 Powered: PC78US, PC88MR, PC78MR
6D102 Powered: PC200-6, PC200-7, PC210-6, PC210-7, PC220-6, PC220-7, PC228US, PC240-6

Key Notes

Assembly Type: Long block assemblies include block, head, crankshaft, camshaft, pistons, and valvetrain components
Condition: New units — not remanufactured or used cores
Engine Family: 4D102 is a 4-cylinder unit; 6D102 is a 6-cylinder unit, both Komatsu-designed diesel platforms
Application: Direct replacement for worn or damaged engine assemblies in Komatsu excavators
Compatibility: Verify engine serial number and machine model before ordering to confirm correct fitment

Why Choose Broken Tractor

✅ New long blocks available for Komatsu diesel platforms
✅ Fast shipping from Baton Rouge, LA and Kimbolton, OH
✅ Knowledgeable staff to confirm fitment before you order

Frequently Asked Questions

What engine type is in a Komatsu excavator?

Many Komatsu excavators run Komatsu-designed 4D102 or 6D102 diesel engines. The 4-cylinder 4D102 powers the PC78US, PC88MR and PC78MR, while the 6-cylinder 6D102 powers the PC200-6, PC200-7, PC210-6, PC210-7, PC220-6, PC220-7, PC228US and PC240-6. Broken Tractor carries new long block assemblies for both engine families.

What is the Komatsu 4D102 engine?

The Komatsu 4D102 is a 4-cylinder, Komatsu-designed diesel engine used in excavators such as the PC78US, PC88MR and PC78MR. We offer a New Long Block Engine for Komatsu 4D102 (SKU KM-4D102-LB-N) as a direct replacement for a worn or damaged engine assembly. Confirm your engine serial number and machine model before ordering.

Which Komatsu excavators use the 6D102 engine?

The 6-cylinder Komatsu 6D102 diesel powers the PC200-6, PC200-7, PC210-6, PC210-7, PC220-6, PC220-7, PC228US and PC240-6 excavators. Broken Tractor carries a New Long Block for Komatsu 6D102 Engine (SKU KM-6D102-LB-N) for these machines. Because fitment can vary, match your engine serial number and machine model before you order.

What Komatsu excavator engine parts come with a long block?

Our Komatsu long block assemblies include the block, head, crankshaft, camshaft, pistons and valvetrain components. These are new units, not remanufactured or used cores. They are built as direct replacements for worn or damaged 4D102 and 6D102 engine assemblies.

Do I need the Komatsu excavator engine number to order a replacement engine?

Yes, you should verify your engine serial number and machine model before ordering to make sure you get the correct long block. Having the engine number and excavator model on hand lets our staff confirm fitment for the 4D102 or 6D102. For help matching the right engine, call (800) 909-7060.