Description
Overview:
The Flywheel Woodruff Key for Yanmar L-series small diesel engines is a precision-machined steel half-moon key used to lock the flywheel securely to the crankshaft. Correct engagement of the key in the keyway keeps the flywheel indexed, helping to maintain starting performance and consistent timing under load. This non-genuine replacement part is suitable for Yanmar L40 and L48 engines and offers a straightforward, cost-effective solution when a worn or sheared key needs replacing. Built for dependable service, it is engineered to replace OEM reference 22512-040120 and corresponds to MPN 320 340. Fit it during flywheel removal/refit, governor or stator work, or after impact events that may have damaged the original key to restore reliable drive between shaft and flywheel.
Key Features:
- Durable, precision-machined steel construction for a secure, repeatable fit in the keyway
- Non Genuine Part engineered to replace OEM 22512-040120 for Yanmar L-series engines
- Helps prevent flywheel slippage and maintains correct timing and starting performance
- Sized to suit the crankshaft/flywheel interface on Yanmar L40 and L48 variants
- Simple to install during routine servicing or flywheel replacement
- Ideal remedy for a sheared or worn key after kickback or overload events
- Stable under vibration and typical operating temperatures of compact diesel engines
- MPN: 320 340, supplied ready to fit with standard workshop tools
Typical Applications:
Used whenever the flywheel is removed or replaced on compact diesel engines powering small plant and garden equipment. Common in generators, water pumps, plate compactors, light construction tools, tillers, and other machinery built around Yanmar L-series engines. Suitable for restoring drive and timing after a sheared key or as preventative maintenance during rebuilds.
Also known as:
Half-moon key, crankshaft key, keyway key, timing key, starter key.
Fits Models:
170F, L40, L40AE, L48
Product Specifications
| L&S Part No. | 320 340 |
|---|---|
| Part Type | Non Genuine Part |
| Unit of Sale | 1 |
| Applications | 170F, L40, L40AE, L48 |
| Machine Type | Engines |
| Fits Brands | Chinese, Yanmar |
| Fits Models | L40AE |
