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JFG |
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#1
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Senior Member ![]() ![]() ![]() Group: Members Posts: 686 Joined: 7-April 16 From: Wales Member No.: 19,869 Region Association: None ![]() |
I lost the tear down pics so i have no images of how it came apart.
Can someone help me with the way to seal the outlet / return pipe that screw onto the bottom of the tank. I have aluminium washers and fibre washers. I've tried with both, the fibres leak badly. They were squashed between the tank and the round collar fixed to the small steel pipe tail. I've tried using just an aluminium washer in the same position as above but still a slight leak. As the retaining nuts are a soft alloy i can't tighten them anymore. Just in case i do ruin them trying to seal them, does anyone know the correct thread size of the outlets on the tank? |
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bdstone914 |
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#2
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bdstone914 ![]() ![]() ![]() ![]() Group: Members Posts: 4,541 Joined: 8-November 03 From: Riverside CA Member No.: 1,319 ![]() |
I have never seen a copper washer used originally on a 914 tank. They are fiber. Not to say that is the best material. The ones I have found are hard and not a good fit. I made my own fiber washers out of gasket material. I use washers on top and bottom of the flange on the nipple. On the feed line the filter sock aluminum washer is part of the filter.
What is important is to hone flat the sealing surface on the tank. Did an install on a tank that would not stop dripping until we removed it, honed the sealing surface with a a piece o f wet or dry 240 grit on a flat steel lock. Copper should work fine if annealed. It is harder than aluminum and may tk more pressure to seal. The aluminum nuts are fragile. I am hesitant to apply too much torque in fear of stripping the threads. That whole original set up is a bit of a CF ( cluster fornication ). I found you and internally tap the threaded nipples to 1/4 NPT and install threaded nipples allowing use of lines that can be disconnect easily without removing hose clamps. I plan to go with AN-6 fittings to eliminate and sealing washers. This does require an external filter as the internal sock will no longer fit. My thought is get the crud out of the tank and change the filter rather than trap it in the tank. Ideally I want a threaded connection from the gas tank line to the tunnel lines. This would allow removal of a line to drain the tank. Maybe a Swagelok fitting on a SS line will work. Have to install it after the line is installed as the fitting will not go through the rubber block. |
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