Description
Overview:
This pair of valve cotters is a Genuine Lister Petter part designed for securing the valve and spring retainer on Lister HA and HR diesel engines. Supplied as two matching halves, each cotter locates in the groove on the valve stem to lock the retainer in place, preventing valve movement under load. Manufactured from durable, hardened steel with a precision tapered form, they are suitable for restoration or routine maintenance where reliable valve retention is essential. Marked with MPN 291 20661, these are unused vintage parts that may show minor age-related tarnish without affecting performance. They help maintain correct valve operation, contributing to stable compression, accurate timing, and long service life in industrial diesel applications.
Key Features:
- Genuine Lister Petter part for assured fit and compatibility
- Pair of matched halves for one valve assembly (keeper/collet style)
- Hardened steel construction for wear resistance and longevity
- Precision tapered profile grips the valve stem groove securely
- Supports stable valve timing and consistent engine performance
- Suitable for overhaul and preventative maintenance on HA/HR engines
- Unused old stock; functionally new with possible cosmetic tarnish
- Compact, simple-to-fit components with standard workshop tools
- Designed to withstand vibration, heat cycles, and diesel operating loads
Typical Applications:
Used during engine rebuilds, head overhauls, and routine valve maintenance on Lister HA and HR diesel engines found in plant, agricultural, and industrial equipment. Ideal for refurbishing stationary engines driving generators, pumps, compressors, and similar machinery where dependable valve retention is required.
Also known as:
Valve keepers, valve locks, split collets, collet wedges, keeper halves, valve spring retainer locks, engine valve collets.
Fits Models:
HA, HR
Alternate Part Numbers:
291-20661, 29120661
Product Specifications
| L&S Part No. | 291 20661 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Lister Petter |
| OEM No. | 291 20661 |
| Unit of Sale | 1 |
| Machine Type | Engines |
| Fits Brands | Lister Petter |
| Key Features | - Genuine Lister Petter part for HA/HR diesel engines - Pair of matched halves for one valve assembly - Hardened steel construction for durability - Precision tapered profile for secure valve stem grip - Suitable for engine rebuilds and maintenance tasks |
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