F: Frame Removing C Comet oil tank

Gerry Clarke

Well Known and Active Forum User
VOC Member
Oil tank developed leak at outlet, so had to be removed for brazing. Also had Conway's fit access port and clean the tank. Just posting this as I don't see much about removing the oil tank for jobs like this without detaching the whole front end. With a steady hand, it is quite easy to take an angle grinder and remove the peening at the bolts on one side. My tank had studs with nuts both sides, earlier models have bolts and nuts.


1. Ground (262x640).jpg



All the studs drifted out without excessive force and the tank was easy to remove. The engine and front wheel were suitably supported on wooden blocks to unload any undue stress.


2. Oil tank removed (640x480).jpg


Caution: if your bolts/studs look very rusted, I wouldn't try this as they will likely require a hydraulic press to shift. I was able to reuse all the original studs and pair them with new chamfered nuts, since there was only very minor rust present at the stud/weldment interface.

3. Re-use studs (562x640).jpg


In fact, I could not have used new spares as they are oversize (I made them to be .314") and I have passed on this information to the Spares Company. KTB rightly states that the bolts/studs must be a precision fit. My originals were just that at .311" and were a very light drift fit after I had wire brushed the tunnels in the headstock.

4. Oil tank refitted (640x480).jpg


Oil tank is back on, leak repaired and we are back on the (very cold) road.

Cheers,

Gerry
 
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