Komatsu Engine Shaft Idler 6742-01-5123

Komatsu Engine Shaft Idler 6742-01-5123 is a Komatsu engine replacement part listed by 19PARTS for engine-section lookup, hub navigation, and part-number verification.

Product overview

Part number 6742-01-5123 is listed as Shaft Idler. Search also by the no-dash alternate number 6742015123.

Engine book references

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

• ENGINES / SA6D114E-2 S/N 26812075-UP / ENGINE / WATER PUMP DRIVE BELT (A601R-01A0)
• ENGINES / SA6D114E-2-TR S/N 26812075-UP / ENGINE / WATER PUMP DRIVE BELT (A601R-01A0)
• ENGINES / SAA6D107E-1L S/N 26580638-UP (For WA380Z-6) / ENGINE COOLING SYSTEM / COOLING FAN DRIVE / COOLING FAN DRIVE (#26580638-) (AFA10-001001)
• ENGINES / SAA6D107E-1L S/N 26580638-up / E0 [ENGINE COOLING SYSTEM] / COOLING FAN DRIVE (|E00057)
• ENGINES / SAA6D107E-2D S/N 26600207-UP (For D61EX-23/D61EXI-23/D61PX-23/D61PXI-23) / ENGINE COOLING SYSTEM / IDLER PULLEY / IDLER PULLEY (#26600207-) (AWP30-001001)
• ENGINES / SAA6D107E-3F S/N 26635492-UP (For D61EX-24/D61EXI-24/D61PX-24/D61PXI-24) / ENGINE COOLING SYSTEM / IDLER PULLEY / IDLER PULLEY (#26635492-) (AWP30-001001)

This part appears in 40 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.