Description
Overview:
Main Bearings U/S 020 (part no. 572 50650/020) are genuine Lister Petter replacement bearing shells for crankshaft support in HR and HRS series engines and related variants. Supplied as a matched pair, these steel-backed shells use a durable bearing-alloy overlay to provide a stable, low-friction running surface. The U/S 0.020 in (0.51 mm) undersize suits crankshafts that have been reground by 0.020 in, restoring correct oil clearance and pressure. Designed for reliability in demanding industrial and agricultural use, they help maintain smooth rotation, reduce wear, and extend engine life. Suitable for Lister Petter HR, HRS, HRW, HRWS, HL and HLT engines, these OEM-standard bearings are an ideal like-for-like replacement during rebuilds or preventative maintenance. Genuine Lister Petter part; may be supplied as New Old Stock.
Key Features:
- Genuine Lister Petter main bearings for assured compatibility and quality
- U/S 0.020 in (0.51 mm) size for reground crankshaft journals
- Steel-backed shells with a wear-resistant bearing alloy for long service life
- Helps maintain correct oil film, pressure, and crankshaft alignment
- Reduces friction and vibration for smoother engine operation
- Supplied as a matched pair of shells for one journal (replaces 321 50040 020 pair)
- Built to OEM tolerances for consistent fit and performance
- Suitable for heavy-duty applications in construction, plant, and agricultural machinery
- Straightforward like-for-like replacement during engine overhaul or repair
- New Old Stock availability preserves original specification components
Typical Applications:
Used during engine rebuilds, crankshaft regrinds, and preventative maintenance on Lister Petter HR-family engines in generators, pumps, compressors, plant equipment, and agricultural machinery. Ideal when restoring correct bearing clearances to recover oil pressure, reduce noise, and improve durability.
Also known as:
Crankshaft main bearings, main bearing shells, engine main shells, conblock bearings (mains), tri-metal shells, undersize main bearings 0.020 in (0.51 mm).
Fits Models:
HR, HRS, HRW, HRWS, HL, HLT
Alternate Part Numbers:
321 50040 020, 572-50060 020, 572 50060/020, 321-50040/020, 572 50060 020, 32150040020, 57250060020
Product Specifications
| L&S Part No. | 572 50650/020 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Lister Petter |
| OEM No. | 572 50650 020 |
| Unit of Sale | 1 |
| Machine Type | Engines |
| Fits Brands | Lister Petter |
| Key Features | - Genuine Lister Petter main bearings for HR-series engines - U/S 0.020 in size for reground crankshaft journals - Steel-backed shells with wear-resistant bearing alloy - Supplied as a matched pair for one journal - Suitable for heavy-duty industrial and agricultural use |
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