Komatsu Engine Unloader Valve A DK487021-2020

Komatsu Engine Unloader Valve A DK487021-2020 is a Komatsu engine replacement part listed by 19PARTS for engine-section lookup, hub navigation, and part-number verification.

Product overview

Part number DK487021-2020 is listed as Unloader Valve A. Search also by the no-dash alternate number DK4870212020.

Engine book references

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

• ENGINES / S6D125-1AH S/N 51975-UP / ENGINE / AIR COMPRESSOR (INNER PARTS)(#53783-) (A7010-B3A1)
• ENGINES / S6D125-1AJ-S S/N 51975-UP / ENGINE / AIR COMPRESSOR (INNER PARTS)(#53783-) (A7010-B3A1)
• ENGINES / S6D125-1AM S/N 51975-UP / ENGINE / AIR COMPRESSOR (INNER PARTS)(#53783-) (A7010-B3A1)
• ENGINES / S6D125-1AM-FW S/N 10001-UP / ENGINE / AIR COMPRESSOR (INNER PARTS)(#47990-) (A7010-B3A1)
• ENGINES / S6D125-1B8 S/N 22230-UP / ACCESSORY / AIR COMPRESSOR (INNER PARTS)(#22230-41920) (0711)
• ENGINES / S6D125-1B8 S/N 22230-UP / ACCESSORY / AIR COMPRESSOR (INNER PARTS)(#41921-) (0711A)

This part appears in 56 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.