Description
Overview:
The Piston Ring Set 030 (AE R20940/K) is a genuine Lister Petter replacement for Petter AVA engines. It is a precision‐machined metal ring set designed to restore cylinder sealing, maintain compression, and control oil, helping the engine run efficiently and start reliably. Marked 030, this set suits bores finished to +0.030 in (0.76 mm) oversize, commonly used after a rebore. Built to OEM standards for fit and function, it supports dependable performance in AVA-powered equipment across construction, agriculture, and industrial use. Supplied as unused old stock, it retains original factory quality. OEM reference: JC11/12/13 030 for accurate identification and fitment on Petter AVA models.
Key Features:
- Genuine Lister Petter part for assured compatibility with Petter AVA engines
- 0.030 in (0.76 mm) oversize specification for correctly rebored cylinders
- Helps restore compression, reduce blow‐by, and lower oil consumption
- Durable, engine‐grade metal construction for long service life
- Precision profiles and end gaps to support reliable cold starts and steady running
- Direct replacement to OEM No. JC11/12/13 030 for straightforward identification
- Suitable for maintenance, overhaul, or full rebuild work on AVA engines
- Unused vintage stock; may show minor tarnish or shelf marks that do not affect function
Typical Applications:
Used during engine rebuilds or services on Petter AVA units fitted to generators, pumps, mixers, compressors, mowers, and site machinery. Ideal when a cylinder has been rebored to +0.030 in (0.76 mm) and new rings are required to re‐establish proper sealing, stabilise oil control, and recover lost power and efficiency.
Also known as:
Piston ring kit, ring pack, 30‐thou over rings, oversize +0.030 ring set, compression and oil control rings for AVA, replacement engine ring set for rebored cylinders.
Fits Models:
AVA
Product Specifications
| L&S Part No. | JC11/12/13 030 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Lister Petter |
| OEM No. | JC11/12/13 030 |
| Unit of Sale | 1 |
| Machine Type | Engines |
| Fits Brands | Lister Petter |
| Key Features | - Genuine Lister Petter part for Petter AVA engines - 0.030 in (0.76 mm) oversize for rebored cylinders - Restores compression and reduces oil consumption - Durable metal construction for long service life - OEM No. JC11/12/13 030 for easy identification |
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