Piston ring set 3802421 is the 102 mm STD three-ring set for Cummins 4BT3.9, 4BTA3.9, 6BT5.9, 6BTA5.9 and ISB engines in both 12- and 24-valve form. Ring depths are 3.0 mm top, 2.35 mm second and a 4.0 mm combined oil control ring, in boron-copper-chromium alloy cast iron with a ceramic coated top ring. It matches STD standard cylinder liners only. Cross-references are 3802050, 3802230, 3802056 and 5482359.
Specifications
| Part No. |
3802421 |
| Standard Bore |
102mm STD |
| Ring Layout |
3-ring piston set |
| Top Compression Ring |
3.0mm |
| Second Compression Ring |
2.35mm |
| Combined Oil Control Ring |
4.0mm |
| Material |
Boron-copper-chromium alloy cast iron |
| Top Ring Coating |
Ceramic coated |
| Fit Requirement |
Matches STD standard cylinder liner only |
| Cross Reference PN |
3802050, 3802230, 3802056, 5482359 |
| Compatible Engines |
Cummins 4BT3.9 / 4BTA3.9 / 6BT5.9 / 6BTA5.9 / ISB 12V & 24V |
Key Features
- Three-ring set for 102 mm STD bore
- Top 3.0 mm, second 2.35 mm, combined oil ring 4.0 mm
- Boron-copper-chromium alloy cast iron
- Ceramic coated top compression ring
- Matches STD standard cylinder liners only
- Cross-references 3802050, 3802230, 3802056 and 5482359
Typical Applications
- Light and medium trucks
- Excavators and loaders
- Generator sets
- Industrial power units
Ordering from Sino Bus Parts
- Wholesale pricing; bulk orders welcome
- Global shipping
- Fitment confirmed against your engine serial or CPL before dispatch
- Contact us on WhatsApp for a quotation
