Komatsu Engine Model List: SAA6D Series Decoded for Excavators, Loaders and Dozers

Komatsu builds its own engines, and understanding their naming system tells you almost everything about the unit before you even open the hood. A code like SAA6D107E-1 breaks down as: turbocharged and aftercooled (SAA), 6-cylinder diesel (6D), 107 mm bore, electronic control (E), and emission generation (-1, -2, -3...). When sourcing a Komatsu engine assembly or its parts, this code — together with the engine serial number — is your most reliable passport to a perfect fit.

1. Excavators: The SAA6D Family

Komatsu excavators from PC120 to PC1250 are powered by a single, well-structured engine family:

Compact and small excavators

• PC120-8 / PC128-8: SAA4D95LE (4-cylinder, 95 mm bore)
• PC130-7 / PC138-8: S4D95 / SAA4D95LE

Mid-size excavators

• PC200-7: SAA6D102E
• PC200-8 / PC210-8 / PC220-8: SAA6D107E-1
• PC200-8M0 / PC210-8M0: SAA6D107E-3
• PC240-8: SAA6D107E-1 / SAA6D114E (by market)

Large excavators

• PC300-8 / PC360-8: SAA6D114E
• PC400-8 / PC450-8: SAA6D125E
• PC490-10 / PC500-10: SAA6D125E

Mining-class excavators

• PC600-8 / PC650-8: SAA6D140E
• PC850-8 / PC1250-8: SAA6D170E

Note: engine fitment varies by region, year, and emission tier. Always verify the full engine model code and serial number from the nameplate before ordering.

2. Wheel Loaders: High-Torque Sixes

Komatsu loaders share the same engine architecture as the excavators, which keeps parts stocking simple for dealers who run both fleets.

• WA320-7: SAA6D107E
• WA380-6 / WA380-7: SAA6D107E / SAA6D114E
• WA470-6 / WA470-7: SAA6D125E
• WA500-6 / WA500-7: SAA6D125E / SA6D125E
• WA600-6: SAA6D140E

3. Dozers: Push Power with the Same DNA

• D61EX / D61PX: SAA6D114E
• D65EX: SAA6D114E / SAA6D125E
• D85EX: SA6D125E / SAA6D125E
• D155AX-7 / D155AX-8: SAA6D140E
• D275AX: SAA6D140E
• D375A: SAA6D170E

4. What the Engine Code Tells You

The generation suffix is where most ordering errors happen. An SAA6D107E-1 injector or ECU will not necessarily fit an SAA6D107E-3, even though the block looks identical.

Key Benefits

• Full SAA6D / SA6D engine code decoder — no more guessing from photos
• Covers excavators PC120–PC1250, loaders WA320–WA600, dozers D61–D375
• Highlights emission-generation differences that cause wrong-part orders
• Includes bore-size table for instant cross-reference
• Backed by a supplier that stocks Komatsu engine assemblies and parts

Model / Specification Reference

About Lanxin Machinery

Guangzhou Lanxin Machinery Equipment Co., Ltd is a specialized supplier of diesel engine assemblies and engine parts for construction and mining equipment. We supply complete Komatsu engines, cylinder heads, fuel injection systems, turbochargers, and electrical components, with every unit pressure-tested and inspected before shipment.

Tell us your machine model and the full engine code from the nameplate — our engineers will match the exact generation and specification, so the engine you receive bolts in and runs like the original.

• Website: construction-engines.com
• WhatsApp: +86 18688416585
• Email: Sales02@lanxinmachinery.com