As some of you will know, I've been having issues getting my fuel tank to seal around the pump unit, as part of the resurrection of my 748 SPS. I shorted out the low-fuel-level sensor and was fortunate enough to get another, which required me to remove the fuel pump again to fit it. I'd had that off before to renew the filter as part of the work, so I knew how fiddle it can be to get the seal, and even had a spare new one in my toolkit (just in case). If you don't know the 748/916 type of seal, it is a simple nitrile ring which sits in a depression halfway up the "top hat" section where it passes into the tank. Easing it down evenly, with a little lubricant is the way to go, watching that you don't get part trapped. But mine wouldn't seal. Even with the new one, with and without lube, twisting it axially to see if that'd help.. No joy. It seeped, dripped, and positively piddled fuel at various attempts. I've run through another ring seal too, just in case. Turns out that the issue is that one of the vent pipes that fit onto the pump unit with jubilee clips had turned, bringing the sharp edge of the clip too near the edge of the tank aperture, scratching it and preventing a decent seal. So I've spent the morning with various stuff Dremeling out the scratches, sanding and polishing the surface to restore the smooth seal surface. Having a coffee now to see if it has worked. Just thought I'd put this up in case anyone else has had problems.
changed my fuel filter the other day, fitted a new seal and had issues getting it to seal again. used a smear of grease and third attempt thought i'd sorted it. Rode to the fuel station and filled it up, paid and then when I walked back to the bike, fuel was pissing out again. Pushed the bike to the side of the station and got my mobile out. A guy on a triumph saw me and came over, he had a couple of allen keys and a minute later the tank was removed and seal inspected, I'd nipped the new seal!! Quick phone call to our kid to get my old seal from the wheelie bin and bring it over. fitted that and hey presto, no more leaking. It's a simple job, but shows how careful you have to be with the seal when tightening down. Just glad I saw the leak and didn't just jump on and ride away!! hate to think what would have happened. there'd only be 101 foggy reps left!!!
Last time I did the filter I put a new seal in.Nipped the bugger when fitting it, so had to put the old one back in.
I now have 3 good used seals, if anyone needs one! Dead easy to nip it, but I'm slick at putting the pump unit in now, with all the practice.
I've Dremeled out the scratches, and polished the surface as far as possible, but now it's leaking in an other area if the circumference. I've succumbed to the urge to try some sealant on the inner face when I put the pump in-hopefully it'll have dried out to a lovely tight seal!!! Everything crossed.
