| Diagram | GEARBOX SHAFTS, BEARINGS AND INNER COVER |
| Subsystem | gearbox |
| Listed in parts books | Not catalogued by year yet |
Mainshaft bearing (Ball journal)
Ball journal bearing for the gearbox mainshaft.
This is the mainshaft ball journal bearing out of the gearbox, listed in the parts book under the figure covering gearbox shafts, bearings, and the inner cover. It supports the mainshaft where it passes through the gearbox casing, letting the shaft turn smoothly under load without excess play.
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The catalog only shows this one appearance, tied to a single year in our records, so we don't have a broader fitment history to lean on. If you're chasing this down for a rebuild, best to check the bearing you're pulling against this part number before ordering a replacement.
The manufacturer tag on file says Lucas, but Lucas didn't make gearbox bearings — that's almost certainly a mislabel on our end, not a fact about who actually produced this part.
Sorry if we got something wrong here. If you think this information isn't correct, .