Description
Overview:
The Piston Ring Set Oversize 020 for Lister Petter HR engines is a genuine replacement designed to restore sealing performance in rebuilt or worn cylinders. Manufactured to OEM standards from wear‐resistant cast iron, the rings maintain cylinder pressure, control oil, and reduce blow‐by for reliable running and easier starts. This set is sized to suit cylinders rebored to +0.020 in (+0.508 mm), giving a precise fit and consistent end gaps when installed to specification. Suitable for the Lister Petter HR series, it supports engines used across construction plant, generators, pumps, and agricultural machinery. Part reference: 572 50622/020. A practical choice for trades and DIY rebuilds where dependable compression and oil control are required to return an HR engine to efficient service.
Key Features:
- Genuine Lister Petter part for assured compatibility and quality
- Oversize +0.020 in (+0.508 mm) for use after cylinder re-bore or hone
- Manufactured to OEM tolerances for consistent sealing and long service life
- Wear‐resistant ring material suitable for diesel temperatures and pressures
- Supports correct compression, reducing blow‐by and oil consumption
- Helps improve starting, power delivery, and fuel efficiency when installed correctly
- Smooth ring faces for controlled bedding‐in and stable oil film
- Suitable for maintenance of vintage HR engines still in active service
- Clearly identified by part number 572 50622/020 for straightforward ordering and inventory control
Typical Applications:
Used during engine overhauls or repairs on Lister Petter HR units fitted to generators, water pumps, compressors, site equipment, and agricultural machinery. Ideal when cylinders have been machined to +0.020 in (+0.508 mm) and fresh rings are needed to re-establish correct compression and oil control.
Also known as:
Lister Petter HR piston rings; 20‐thou oversize piston ring set; +0.020 in oversize rings (+0.508 mm); HR series oversize compression and oil control rings; HR engine ring set.
Fits Models:
HR
Product Specifications
| L&S Part No. | 572 50622/020 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Lister Petter |
| OEM No. | 572 50622/020 |
| Unit of Sale | 1 |
| Machine Type | Engines |
| Fits Brands | Lister Petter |
| Key Features | - Genuine Lister Petter part ensures compatibility with HR engines - Oversize +0.020 in for rebored cylinders - OEM tolerances for reliable sealing and long service life - Wear-resistant cast iron suitable for diesel conditions - Reduces blow-by and oil consumption for efficient operation |
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