Description
Overview:
The Main Bearing Undersize 040 for STW Air Cooler Diesel Engine is a genuine Lister Petter component designed for the crankshaft main journals on ST and STW series engines. Supplied as precision-machined bearing shells, it is made from durable, steel-backed bearing material with an anti-friction lining for stable oil film support and long service life. This undersize 0.040 in (1.02 mm) option is intended for engines where the crankshaft has been reground to suit, restoring correct clearances, oil pressure and smooth running. It is a suitable replacement for worn or damaged originals and helps reduce vibration and bearing noise. As a vintage, unused part it may show minor tarnishing from storage, but remains fully functional. Brand: Lister Petter. Genuine Part.
Key Features:
- Genuine Lister Petter part for correct fit and dependable performance
- Undersize 0.040 in (1.02 mm) for use with reground crankshafts
- Steel-backed shells with anti-friction lining for durability and stable lubrication
- Precision sizing helps maintain oil pressure and reduce crankshaft wear
- Suitable for ST/STW air-cooled diesel engines used in plant and machinery
- Helps restore smooth operation and reduce knock after overhaul
- Manufactured to OEM tolerances for consistent, repeatable clearances
- Unused vintage stock; may have light tarnish from age with no effect on function
- Straightforward to fit with standard workshop tools during an engine rebuild
Typical Applications:
Used during engine overhauls or repairs of Lister Petter ST and STW diesel engines after a crank regrind to 0.040 in (1.02 mm) undersize. Common in generators, pumps, compressors, small plant, agricultural equipment and other installations where reliable continuous-duty operation is required.
Also known as:
Crankshaft main bearing shells 0.040, 40 thou undersize mains, bottom-end main shells, undersize main shells, engine bearing shells u/s, 0.040in main shells (1.02 mm).
Fits Models:
ST, STW
Alternate Part Numbers:
570-12970/040, 570 12970 040, 57012970040, 201 80080, 201 80090 040
Product Specifications
| L&S Part No. | 570 12970/040 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Lister Petter |
| OEM No. | 570-12970/040 |
| Unit of Sale | 1 |
| Machine Type | Engines |
| Fits Brands | Lister Petter |
| Key Features | - Genuine Lister Petter part for ST/STW diesel engines - Undersize 0.040 in (1.02 mm) for reground crankshafts - Steel-backed with anti-friction lining for stable lubrication - Precision sizing maintains oil pressure and reduces wear - Suitable for generators, pumps, and compressors applications |
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