Sump Manhole Socket Size

[JBBenson]

My manhole cover on my sump is weeping, I would like to snug it up, any idea what size that hexagonal socket is?

 

Because of the rounded corners I can't get an accurate measurement.

 

Anybody know?

[coreytrevor]

27mm

[docc]

Same as the axle nuts which can be pressed into tool service.

[JBBenson]

Thanks.

 

Turns out that the Guzzi tool kit has a wrench that sort of fits.

 

It also turns out that the weep was coming from the drain plug, which I managed to squeeze another 1/16 turn closed.

 

Hopefully, that stops it. Next oil change I will change the funny brass & rubber sealing washer.