Description
Overview:
The Main Bearing (Short) 020 for Petters AAI Range Engines is a genuine Lister Petter bearing shell designed to support the crankshaft and maintain a stable oil film under load. Made as a steel-backed bearing shell with a precision bearing-alloy lining, it resists wear while protecting the journal surface. The "020" specification indicates an undersize of 0.020 in (0.508 mm), intended for use with a correctly reground crankshaft. Built to OEM standards for the Petter AAI engine, it helps restore correct clearances, reduce friction, and maintain oil pressure. This unused old-stock vintage component may show minor tarnishing or storage marks, which do not affect service life when installed properly. Suitable for restoration and routine overhaul work on AAI engines.
Key Features:
- Genuine Lister Petter part for Petters AAI engines, ensuring correct fit and compatibility
- OEM reference 369670/AAC8/020 for accurate identification
- 0.020 in (0.508 mm) undersize to match reground crank journals and restore clearances
- "Short" pattern main bearing shell as specified for applicable AAI main positions
- Steel-backed bearing with durable bearing-alloy lining for load capacity and conformability
- Manufactured to OE tolerances for consistent performance and longevity
- Unused old-stock vintage item; may show light tarnish from storage only
- Suitable for engine rebuilds, preventative maintenance, and vintage restorations
Typical Applications:
Used during overhaul of Petter AAI industrial engines found in generators, pumps, welders, and agricultural or construction equipment. Ideal when a crankshaft has been reground by 0.020 in (0.508 mm) and correct bearing shells are needed to achieve proper oil clearance and smooth, reliable running.
Also known as:
Main bearing shell; crankshaft main bearing; AAI short main shell; 0.020 in undersize main (0.508 mm undersize); engine bearing insert for Petter; lower/upper main bearing shell (as applicable to position).
Fits Models:
AAI
Product Specifications
| L&S Part No. | 369670/AAC8/020 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Lister Petter |
| OEM No. | 369670/AAC8/020 |
| Unit of Sale | 1 |
| Machine Type | Engines |
| Fits Brands | Lister Petter |
| Key Features | - Genuine Lister Petter part for Petters AAI engines - 0.020 in undersize for reground crank journals - Steel-backed with bearing-alloy lining for durability - OEM reference 369670/AAC8/020 for identification - Suitable for engine rebuilds and vintage restorations |
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