A tale of two Yong Hengs

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biohazardman

biohazardman

Member
Jul 3, 2019
5,451
277
Herriman, UT United States
Well I baptized my new Yong Heng shortly after I got it by not turning on the water pump. I smelled something burning and looked down to see it smoking. I turned it off and turned on the pump and it ran next time I tried it. It ran long enough to fill my new Great White tank most of the way and then it started making more noise than normal. So, I tore it apart and found that the factory had not put any locktight on the second stage piston so the top threaded piece had loosened up banged on the top of the head and destroyed itself. So, I ordered a new part for $12. Let us remember the reason I bought Yong Heng #2 was because I had overheated my first one three times so no longer trusted it to last. 



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Anyway I finally got around to putting the new piston on the newer machine and plugged it in and tested it. It werqed fine when I tested it but when I tried to use it later on it started banging and rattling like it was going to come apart. It was about that time that I remembered I had made a mental note to put oil in it before I ran it! 😵 Now I know why I ordered a new piston set a few days back before I started all of this.

In the meantime I am still using my near two year old YH that I have overheated three times to 100C+ degrees so don't trust it. 😃 I did pick up a corded outlet with a switch on it so when I turn on the power for the compressor to run the pump turns on automatically. Sadly that does not help with not putting any oil in it though.

Old age or brain damage take your pick. Whatever it is it is one of the few constants in my life.
 
I remember sassing the older generation among my friends for constantly writing things down and making a check list. Now I find myself constantly writing things down and making a checklist.

I'm sorry to hear the news. I remember some of the images you posted where you have a "Turn off AC first" by your YH setup. You need to create a pre-compressor checklist and put it up there. Heck maybe laminate it or print it off and make you some checkboxes and run a strip of packing tape down it with a dry erase marker by there. Then once you have it always keep to it until it becomes mental memory.

It's easy to overlook something if you don't have something mechanical or a mechanical lock-out in place. I've had too many close calls with many things like mowers with no oil. I always put a sheet of paper around the fill location that says "NO OIL!". The check list of "Check oil" before starting saves me :)




 
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You stated that they { factory } did not put lock tight on secound stage piston, what type of lock tight would work? Heat is how you losen up lock tight, so running compressor will diminish lock tight effectivness as it heats up. Normanly torquing a bolt to a recomended inch pound/ foot pound/ neton meter spec would be used. I will be rebuilding my Yong Heng in the future, and forsee trying to prevent most of the problems if possible.Thank you, db
 
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...., what type of lock tight would work? Heat is how you losen up lock tight, so running compressor will diminish lock tight effectivness ...
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On my YH I used Loctite 272 ( Described as high temperature, high strength ). You can get it at very low cost on ebay. there are types that can stand even higher temperature but its kind of hard to get and potentially more expensive. Here is a table on the properties of different Loctite :

https://henkeladhesivesna.com/henkeldocs/LT-6540_AN_RemovableReliable_SS_v11_Final_Links.pdf
 
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Ouch. Maybe between the two, you can assemble one that's trustworthy 😂. On a serious note, I hope that type of thing doesn't happen to you again. I've got my water pump and compressor wired together, so if I plug it in, the water is at the same time. I aways check for flow regardless. I'm only on my 2nd oil change, but the 3rd should be soon. 

I've made plenty of other dumb mistakes. Usually when I'm working too hard/too much when too tired or mentally spent. I left the scope on my Crown on it but loose for some reason one day? Went to pick it up the next day, and the scope came tumbling off. I caught it, but not until after the scope mounts had gouged my stock finish to death. There's also a hole I patched in my ceiling from another such incident. Beyond all, the practice of pointing guns in a safe direction is permanently engrained in me.


 
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Wow. No offense but do you have like some kind of memory loss or what. How can you forget water pump 3 times and forget to put oil and just start your compressor. Always make sure there is oil and pump is running.
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Yes, major memory loss. I was beat nearly to death with a pipe by some wanna be for no reason that I am aware of. I was out on the first blow so did not have to experience the rest. When I came to I stood up and was falling down for the last time when the strong arm of a young EMT grabbed me, pulled me in the ambulance and did an emergency tracheotomy on me so I could breath again. Two ambulance rides and two hospitals later surgeons put a titanium plate in my throat cuz my larynx was shattered. I have part of an ear that still werqs for balance but it's pretty iffy sometimes and I was told I have brain damage. I lost 14 years worth of memories pretty much completely and the rest is Swiss cheese. Still my memory is slowly improving and I am able to drive again so am getting better some seven years later. But I am also getting old so I really can't tell whether it's the age or the damage that is most involved in these mishaps. At least I have a good excuse for most things anyway. 😉
 
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...., what type of lock tight would work? Heat is how you losen up lock tight, so running compressor will diminish lock tight effectivness ...
Click to expand...

On my YH I used Loctite 272 ( Described as high temperature, high strength ). You can get it at very low cost on ebay. there are types that can stand even higher temperature but its kind of hard to get and potentially more expensive. Here is a table on the properties of different Loctite :

https://henkeladhesivesna.com/henkeldocs/LT-6540_AN_RemovableReliable_SS_v11_Final_Links.pdf
Click to expand...


I had some Permatex sleeve retainer that is good to 400 degrees I used on the new piston part. But I really don't have to worry about that anymore cuz I destroyed the piston rod and have a new piston set on the way. I ordered it a few days ago thinking I might need it someday. ;^) Guess I was right.
 
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Ouch. Maybe between the two, you can assemble one that's trustworthy 😂. On a serious note, I hope that type of thing doesn't happen to you again. I've got my water pump and compressor wired together, so if I plug it in, the water is at the same time. I aways check for flow regardless. I'm only on my 2nd oil change, but the 3rd should be soon. 

I've made plenty of other dumb mistakes. Usually when I'm working too hard/too much when too tired or mentally spent. I left the scope on my Crown on it but loose for some reason one day? Went to pick it up the next day, and the scope came tumbling off. I caught it, but not until after the scope mounts had gouged my stock finish to death. There's also a hole I patched in my ceiling from another such incident. Beyond all, the practice of pointing guns in a safe direction is permanently engrained in me.

Click to expand...


I do really stupid stuff all of the time. Several of them when done in succession have put me in a very bad life or death situation a few times. Lucky that I am still here and I thank the Lord for that one. I am more aware of this now so try to be careful and pay more attention to the consequences of each of my actions. I do have some brain damage from an assault seven years back. So I do have an excuse. I am getting old too so that is two excuses I am doing good? ;^)
 
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You stated that they { factory } did not put lock tight on secound stage piston, what type of lock tight would work? Heat is how you losen up lock tight, so running compressor will diminish lock tight effectivness as it heats up. Normanly torquing a bolt to a recomended inch pound/ foot pound/ neton meter spec would be used. I will be rebuilding my Yong Heng in the future, and forsee trying to prevent most of the problems if possible.Thank you, db
Click to expand...

I figure anything over 250 to 300 degrees should werq I used some Permatex sleeve retainer, I had laying around, good for 400 degrees. Some of the locktight products are good to 450 deg.
 
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I hate to hear your misfortune. But I can't help but to find it very humorous.........because I totally understand. 😂

I'm in good company here.
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Yes, it is humorous that is why I posted. I find it completely insane that I keep beating up on my new compressor that I bought as my back up cuz I did not feel the old one was trustworthy. While my old one just keeps on kicking out the psi near two years later even though I have abused it as well.
 
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I remember sassing the older generation among my friends for constantly writing things down and making a check list. Now I find myself constantly writing things down and making a checklist.

I'm sorry to hear the news. I remember some of the images you posted where you have a "Turn off AC first" by your YH setup. You need to create a pre-compressor checklist and put it up there. Heck maybe laminate it or print it off and make you some checkboxes and run a strip of packing tape down it with a dry erase marker by there. Then once you have it always keep to it until it becomes mental memory.

It's easy to overlook something if you don't have something mechanical or a mechanical lock-out in place. I've had too many close calls with many things like mowers with no oil. I always put a sheet of paper around the fill location that says "NO OIL!". The check list of "Check oil" before starting saves me :)



Click to expand...


Lists and notes are very much needed and used in my life. It's just that I don't always pay attention to them that is the problem. If I don't turn off the AC I blow a breaker. I have second note next to the power switch on the compressor that says the same thing. That breaker should be worn out by now as many times as I have blown it. ;^)
 
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I had a YH use for one year and rip, change it for a similar one with a digital panel, damn! Looks similar but a world of difference, much much better. 

- temperature stays in the 45c range, yo do not get burned

- digital panel, you can set whatever pressure up to 300b

- better construction

- moisture separator really works

- air stinks much less (I use also filters)

- it is a bit less noisier

9 month now, cero issues but a busted oring. Is used for top off 6.8l and 9L scbas. Means about 30 min each time
 
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