| Diagram | Fig. 8 — Chaincases, Chains, Sprockets, Clutch, Alternator · ref 39 |
| Subsystem | primary |
| Listed in parts books | 1975 |
Norton Seating Washer, Level Plug
A seating washer for the level plug in the primary chaincase.
This is a seating washer that sits under the level plug in the primary chaincase, per the catalog record. It shows up in the Inner and Outer Chaincase / Hydraulic Tensioner figure, which places it on the primary drive side of the machine rather than the gearbox or engine.
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The job of a seating washer like this is straightforward: it sits between the level plug and its threaded boss to make a seal so oil doesn't seep out around the plug. Given the primary chaincase context here, that's the level plug used for checking or topping the primary chaincase oil.
The catalog only ties this part to a single year of appearances, so if you're matching it to a specific model or chaincase setup, check the number against your own parts book or call the shop and we'll confirm before you order.
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