Komatsu Engine Thermostat 600-421-6240

Komatsu Engine Thermostat 600-421-6240 is a Komatsu engine replacement part listed by 19PARTS for engine-section lookup, hub navigation, and part-number verification.

Product overview

Part number 600-421-6240 is listed as Thermostat. Search also by the no-dash alternate number 6004216240.

Engine book references

This part appears in Komatsu engine parts book paths such as:

• ENGINES / SAA4D95LE-5 S/N 501795-UP (For PC130-8) / E0 ENGINE COOLING SYSTEM / THERMOSTAT (AEC00-001001)
• ENGINES / SAA4D95LE-5 S/N 501795-UP (For PC130-8) / ENGINE COOLING SYSTEM / THERMOSTAT / THERMOSTAT(#501795-) (AEC00-001001)
• ENGINES / SAA4D95LE-5A S/N 500001-UP (For PC138US-8/PC138USLC-8) / ENGINE COOLING SYSTEM / THERMOSTAT / THERMOSTAT (#500001-) (AEC00-001001)
• ENGINES / SAA4D95LE-5A S/N 500001-UP / ENGINE / THERMOSTAT (A173R-01A7)
• ENGINES / SAA4D95LE-5AA S/N 503227-UP (For D37EX-22/D37PX-22) / ENGINE COOLING SYSTEM / THERMOSTAT / THERMOSTAT (#503227-) (AEC00-001001)
• ENGINES / SAA4D95LE-5BB S/N 503228-UP (For D31EX-22/D31PX-22) / ENGINE COOLING SYSTEM / THERMOSTAT / THERMOSTAT (#503228-) (AEC00-001001)

This part appears in 20 Komatsu engine book paths in our reference data.

Verification note

Always confirm final fitment by engine model, serial range, diagram callout, and part number before ordering. Hub references are provided to help buyers find the right engine section and related parts faster.

Keep Ops Moving

19PARTS organizes Komatsu engine parts around searchable engine-model hubs so rebuild shops, equipment owners, and fleet teams can identify parts and keep repairs moving.