Monabones
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Post by Monabones on Feb 13, 2016 17:52:39 GMT -8
Hi Experts....I am starting to work on my water tank and have not worked on this type of water inlet before. It looks like there is a cap that should unscrew. It will not budge so I asking for help on this. First is this type with the air pressure valve the cap? If so what would be a good way to get the cap off? I tried to heat it up with Mapp Gas but still no success.
Also there is another 1 inch hex head with a cap of some kind that appears to screw into the water inlet. What is that and what is it's purpose? Thank you in advance for your help. 
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Ten
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70 Shasta 16SC + 1964 Airflyte
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Post by Ten on Feb 13, 2016 18:43:16 GMT -8
The "cap" looks to actually be a "plug". The points that resemble a ship's wheel would be where you grasp to unscrew the plug. The air valve in the center is where the pressure is added by means of compressed air. You might try soaking it down with a good penetrating oil from inside the filler pipe. You likely will have to clamp the filler into a tight grip like a vice to hold it steady, and use some good leverage to unscrew with. HOWEVER, it looks like it may be cast out of pot metal, which is very brittle. It could be quite easy to break off the tips on the points of the "ship's wheel", or the filler as a whole. Patience is a huge virtue. Let your penetrating oil have a good amount of time to soak in. And be gently persuasive.
The other opening in the filler plug was probably an access port for a pressure gauge.
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Post by bigbill on Feb 14, 2016 5:29:55 GMT -8
I'm not certain but the small plug appears to be a pressure relief valve (pop off) to keep air pressure in tank from exceeding a certain pressure which might cause the system to fail. The large cap unscrews and is probably stuck. I would spray it with PB Blaster or Kroil penetrate. Then use a strap type kitchen jar opener to attempt to open it with out breaking off the "ears" Allow the penetrating fluids to have to work it may take several days of soaking to loosen it. Try to find a dish/container just slightly larger than it to allow the penetrate run off to collect and build up around the piece. Patience is the key here if you wish to save it. Once you get it apart boil it in a pan off water and dawn dish soap to clean it up.
I have never seen this type of filler it is absolutely worth saving if you can.
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Monabones
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1966 Aristocrat Land Commander
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Post by Monabones on Feb 14, 2016 8:35:39 GMT -8
I'm not certain but the small plug appears to be a pressure relief valve (pop off) to keep air pressure in tank from exceeding a certain pressure which might cause the system to fail. The large cap unscrews and is probably stuck. I would spray it with PB Blaster or Kroil penetrate. Then use a strap type kitchen jar opener to attempt to open it with out breaking off the "ears" Allow the penetrating fluids to have to work it may take several days of soaking to loosen it. Try to find a dish/container just slightly larger than it to allow the penetrate run off to collect and build up around the piece. Patience is the key here if you wish to save it. Once you get it apart boil it in a pan off water and dawn dish soap to clean it up. I have never seen this type of filler it is absolutely worth saving if you can. Well I will try those techniques suggested and let you all know. I am determined to save this. The air valve works I tested it. |
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Post by vintagebruce on Feb 14, 2016 18:24:01 GMT -8
When you say the air valve works you tested it, did you manage to blow more air in, or release pressure? Seems like if the tank is pressurized and will not allow the cap to unscrew, you could get a valve stem remover and try to remove the valve stem to release internal pressure. Using mapp gas may not help, because when you heat metal it expands, thus the plug might get even tighter. If you can pack some ice on the part that should screw out, maybe the "plug" will contract just enough to let the penetrating oil molecules migrate better and do their job. If you get real desperate for something to freeze the cap area, you might as a last resort consider buying some pricey freeze gas in a can...here is a CRC Freeze Off video for an example. Disclaimer I own no stock in CRC... www.youtube.com/watch?v=b0BaowQvL6c |
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Monabones
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1966 Aristocrat Land Commander
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Post by Monabones on Feb 14, 2016 19:21:37 GMT -8
When you say the air valve works you tested it, did you manage to blow more air in, or release pressure? Seems like if the tank is pressurized and will not allow the cap to unscrew, you could get a valve stem remover and try to remove the valve stem to release internal pressure. Using mapp gas may not help, because when you heat metal it expands, thus the plug might get even tighter. If you can pack some ice on the part that should screw out, maybe the "plug" will contract just enough to let the penetrating oil molecules migrate better and do their job. If you get real desperate for something to freeze the cap area, you might as a last resort consider buying some pricey freeze gas in a can...here is a CRC Freeze Off video for an example. Disclaimer I own no stock in CRC... www.youtube.com/watch?v=b0BaowQvL6cWell I have the main inlet head off the tank. So it is removed from the main pipe that screws into the tank. I just hooked up my air compressor to see if air would come out the the main head. I like the ice idea....what do you think about putting this head in the freezer? See if that would help get the lubricant to get in the nooks and crannys. |
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Post by vintagebruce on Feb 14, 2016 19:24:54 GMT -8
Sounds like something easy to do that won't cost you anything more to try, just be careful with the cast piece
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Monabones
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Post by Monabones on Feb 17, 2016 17:22:51 GMT -8
Sounds like something easy to do that won't cost you anything more to try, just be careful with the cast piece Success today!! I got the cap off doing the following:
1. Used my heat gun to make the area below the cap very hot. 2. Then put is in a bucket of cold water. 3. Then put the had in my vice and got the long handle pipe wrench out. 4. Put a small block of wood under the vice so the pipe could not rotate as I cranked down on the pipe wrench. 5. It came right off. 6. Soaking in a bucket of water w/ bleach.
PS I tried the freezer but it did not work.
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Ten
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70 Shasta 16SC + 1964 Airflyte
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Post by Ten on Feb 17, 2016 19:15:41 GMT -8
I love happy endings! (Of course we all know this is just the very beginning....)
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