Piston 3017349, commonly carrying the -20 suffix, fits Cummins NT855, NTA855 and NH855 engines. Bore diameter is 139.7 mm with a compression height of 101.62 mm and overall height of 159.02 mm. The combustion chamber measures 106.37 mm across for a 14.5:1 compression ratio, and the wrist pin bore is 50.77 × 120 mm. Each piston weighs about 3.2 kg.
Specifications
| Part Number |
3017349 (common suffix -20) |
| Engine Compatibility |
Cummins NT855 / NTA855 / NH855 |
| Bore Diameter |
139.7 mm (5.5") |
| Compression Height |
101.62 mm |
| Total Height |
159.02 mm |
| Wrist Pin Dimensions |
50.77 × 120 mm |
| Combustion Chamber Diameter |
106.37 mm |
| Compression Ratio |
14.5:1 |
| Material |
Reinforced alloy cast iron / aluminum alloy (OEM upgraded) |
| Weight |
Approx. 3.2 kg |
| Standard |
Genuine CCEC Quality |
Key Features
- 139.7 mm (5.5 in) bore diameter
- Compression height 101.62 mm, total height 159.02 mm
- 106.37 mm combustion chamber, 14.5:1 compression ratio
- Wrist pin dimensions 50.77 × 120 mm
- Approximately 3.2 kg per piston
Typical Applications
- Generator sets
- Construction machinery
- Marine propulsion engines
- 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
