Can't get fuel cap to seal

[swinny]

Anyone want to throw their hat into the ring with an issue I'm having with getting a fuel tank cap to seal? 

 

Seal looks ok, tried a different seal, tried 2 seals. Tried a different cap but wasn't just right. Tried to even order a new cap but they sent me one for a newer machine and can't get one for this now!

 

When working on any grade and a fullish tank even half full etc the bloody thing drips and it's driving me mad. 

 

Top of tank looks ok too. Spring in the cap seems ok.

 

Any ideas or source of new caps? Bet them universal push in ones won't work either

 

I'm considering trying to lightly wet and dry the top as you can see scouring in the paint.... if it's back to metal all over maybe will seal?

Edited June 28, 2023 by swinny

[Muddy42]

One of the locking wings looks bent down?

[spuddog0507]

Think i would be looking at locking tabs as well as they dont look even, had a similar problem on a hydraulic tank few years back and ended up putting a plastic sleeve made from a pop bottle inside the gauze filter inside the tank, problem solved,  

[Dan Maynard]

Can you scribble all over the washer with marker, and see where it transfers? Or colour the top of the tank and see where it rubs off?

 

Just might give an idea of where it's clamping down.

[GarethM]

Maybe make a new rubber gasket from an old tyre inner tube ?.

[Muddy42]

12 hours ago, GarethM said:

Maybe make a new rubber gasket from an old tyre inner tube ?.

Good idea. 

 

If all else fails, you could try and make a hillbilly fix with a thick plastic bottle.  Try and find a bottle with as close a neck profile as the the fuel tank shoulder.  Cut the neck and lid off the bottle and jubilee clip it to the fuel tank with a strip of rubber between the surfaces.  An aspen or motomix bottle might work.  You could even mold the plastic to fit with a heatgun. The aspen bottle cap can then simply be unscrewed for filling.

[GarethM]

2 minutes ago, Muddy42 said:

Good idea. 

 

If all else fails, you could try and make a hillbilly fix with a thick plastic bottle.  Try and find a bottle with as close a neck profile as the the fuel tank shoulder.  Cut the neck and lid off the bottle and jubilee clip it to the fuel tank with a strip of rubber between the surfaces.  An aspen or motomix bottle might work.  You could even mold the plastic to fit with a heatgun. The aspen bottle cap can then simply be unscrewed for filling.

 

Is it 60mm ?

[Muddy42]

You could even try and clip on an old jerry can lid?  Proper hillbilly.

[swinny]

18 hours ago, GarethM said:

Maybe make a new rubber gasket from an old tyre inner tube ?.

Tried that well.... doubled up the gasket if you get me.

 

Just looked and the tabs are level

[swinny]

4 hours ago, Muddy42 said:

You could even try and clip on an old jerry can lid?  Proper hillbilly.

All good ideas but it needs to breath still