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Komatsu 6744-81-4010 is the engine oil pressure sensor (switch type, with integral connector). It is used on Komatsu -8 series excavators and D51-22 dozers. This aftermarket version has the same mounting and electrical connector as the original, so it plugs in and bolts on where the old one came off.
The same part is also sold as Cummins 4076930.
Sold as one unit. Check the number on your old part, or in the parts manual for your machine, before ordering.
| Part Type | Oil Pressure Sensor |
| Replaces | Komatsu 6744-81-4010 |
| Type | Oil pressure switch, integral connector |
| Cross References | Cummins 4076930 |
| Fits | Komatsu PC200-8; Komatsu PC200LC-8; Komatsu PC220LC-8; Komatsu PC300LC-8; Komatsu PC350LC-8; Komatsu D51EX-22; Komatsu D51PX-22 |
| Condition | New, aftermarket |
| Stat. HS-Code | 903289 |
Komatsu machines
Check the part number on your old unit before ordering.
| Komatsu Part No.(SPM Part No.) | Fits |
|---|---|
| 6744-81-4010(SPM-HEP-3025) | Komatsu PC200-8, Komatsu PC200LC-8, Komatsu PC220LC-8, Komatsu PC300LC-8, Komatsu PC350LC-8, Komatsu D51EX-22, Komatsu D51PX-22 |
| Brand | Part No. |
|---|---|
| Komatsu | 6744-81-4010 (this page, SPM-HEP-3025) |
| Cummins | 4076930 |
All of these numbers are the same part.
Low oil pressure warning
A failed oil pressure sensor or switch can give a false low pressure warning. Always check the real oil pressure with a gauge before assuming the sensor is at fault.
No warning at all
A switch that has failed closed or open can hide a real low pressure problem; replace a doubtful one.
Leaks and corroded plugs
Oil weeping from the body or a corroded plug are reasons to replace it.
Fitting tips
Fit it with the engine cold, use a new sealing washer or thread sealant as the original and check for leaks after starting.
We check what other aftermarket sellers charge for this same part. Their prices on the date we checked:
| Seller | Price | Checked |
|---|---|---|
| eBay (12 aftermarket sellers) | USD 27.43 to 37.33 | 6 Oct 2026 |
| Holdwell | USD 32.00 | 6 Oct 2026 |
| SINOCMP | USD 39.00 | 6 Oct 2026 |
| MyMROmarts | USD 90.22 | 6 Oct 2026 |
| Spare Part Mart | USD 21.94 | Today |
Our price of USD 21.94 is 20% to 76% less than these sellers.
Found this part cheaper somewhere else? Send us the listing and we will beat it by 5% under our Price Beat Guarantee. Every order is also covered by our 30 day money back guarantee.
No. It is an aftermarket part made to fit in place of Komatsu 6744-81-4010. It is not made by or affiliated with Komatsu; the Komatsu part number is used only to show what it replaces.
It fits Komatsu PC200-8; Komatsu PC200LC-8; Komatsu PC220LC-8; Komatsu PC300LC-8; Komatsu PC350LC-8; Komatsu D51EX-22; Komatsu D51PX-22. Machines change parts between serial number ranges, so check the number on your old part or in your parts manual.
It has the same mounting and electrical connector as the original. Check the plug and terminals match your old part, and test it before putting the machine back to work.
Yes, we ship worldwide. Shipping is calculated at checkout, and every order is covered by our 30 day money back guarantee and price beat guarantee.
Prices depend on your postcode.
In USD for the quantity selected. The exact cost is confirmed at checkout.
