T3 bevel box drain with swinging arm?

[tris]

Magnet’s in the Drain Plug IIRC not the filler/vent

[passinghamt]

@tris

Magnet’s in the Drain Plug IIRC not the filler/vent

It isn’t on my T3 bevel box. Â It’s in the filler at the top. Â

[Mike_H]

Yes by default the same plug is used for engine sump drain, AND both gearbox & final drive fillers. (Altho mine had hex key (Allen key) filler plugs in the g/box & F/D. This design does not have a magnet but does have an O-ring seal.)

[Mike_H]

@tris

I looked at this but found that for my Cali all I need to do is burp the bevel box.

Normally that should be sufficient. Tried it once (having read about it for the first time on here!) but nothing came out. (Yes it was after a good long ride to get it properly hot.)

However I now wonder whether that was because the channel was open between f/d housing and swingarm tunnel, but that would require the paper gasket to have a corresponding cut-out, but I don’t remember seeing any.

[passinghamt]

@Mike H

@tris

I looked at this but found that for my Cali all I need to do is burp the bevel box.

Normally that should be sufficient. Tried it once (having read about it for the first time on here!) but nothing came out. (Yes it was after a good long ride to get it properly hot.)

However I now wonder whether that was because the channel was open between f/d housing and swingarm tunnel, but that would require the paper gasket to have a corresponding cut-out, but I don’t remember seeing any.

Although I started by asking about these channels, after further reading I’m now under the impression that said holes are for oil drainage. Â Can’t the box breathe air through the bearings into the swinging arm?

[ranton_rambler]

I think you’re right - slots are to let oil drain back into the bevel box. Air should be able to travel freely through the bearing, but the swing arm is a closed space so will pressurise when it gets hot.

All I can say is that whenever I have filled my bevel box, oil dribbles out from the filler plug area after a ride. If I crack it open whilst hot it stops. Perhaps I just need a new seal for the filler plug?

Ian

[tris]

@passinghamt

…On returning home I drained the box, and the leak can’t have been that bad, indeed I may have previously overfilled the box…

I don’t want to teach my grandmother to suck eggs but have you checked the gearbox oil level?

My bevel box leaked as well after a long ride and I EVENTUALLY found that the oil level in the gear box was down - rear oil seal failure/wear

[passinghamt]

@tris

@passinghamt

…On returning home I drained the box, and the leak can’t have been that bad, indeed I may have previously overfilled the box…

I don’t want to teach my grandmother to suck eggs but have you checked the gearbox oil level?

My bevel box leaked as well after a long ride and I EVENTUALLY found that the oil level in the gear box was down - rear oil seal failure/wear

Thanks. Â Yes, I did check. Â The gearbox level is OK.

[passinghamt]

@ranton_rambler

I think you’re right - slots are to let oil drain back into the bevel box. Air should be able to travel freely through the bearing, but the swing arm is a closed space so will pressurise when it gets hot.

All I can say is that whenever I have filled my bevel box, oil dribbles out from the filler plug area after a ride. If I crack it open whilst hot it stops. Perhaps I just need a new seal for the filler plug?

Ian

I’ll try that when I get to FordingbridgeÂ