Yong Heng compressor ... I just bought 1 ...

[Dan H]

Mine just seized up after 10 minutes of use yesterday. Only thing I have done differently is I switched from RP to Chemlube.. .. Probably has nothing to do with it. I had about 18 hours on it using RP and under 1 hour with chemlube and when I had it open to replace the gaskets a while back it was in pristine condition with the Rp. It had about 10 hours on it after I replaced the gaskets with RP.  I'll crack it open again and see what happened. But I'm sure it's just a coincidence that I just switched over to the better lube less than an hour before it died..   

If you got Chemlube 751 or Nuvair 751 you know it was not the oil , that is a fact .... we have to many running it now that are showing a big improvement over royal purple and the like .... like so many other's the damage was more than likely helped/caused  by royal purple since it is not designed to run in this application .... put the new parts in it , and then start running the 751 is what I would do then you start off new not dieseling up the second stage ...

 
If you read the first part, you saw that I had it apart using the RP to put a gasket in and found no problems at all after many hours of use. It was only after putting the 751 for less than an hour that this happened.

Yep ....  and running the wrong oil like royal purple has its consequences .... go look at all the specs it is not designed to run in this application at all !  it is designed for low pressure compressors ,and that is a whole different ball game .... its like you ran the wrong oil for this long then figured it out , and switched and then had problems ... do you really think this would not of happened if you just kept running royal purple ? ... that we know diesels in the second stage as reported by a group of members here that have blown up/damaged  their compressors running royal purple  ....   

[Fate]

Dan, is there any one "spec" that stands out as a prime indicator of a lubricant's propensity to detonate in the YH? That is, a go/no-go flag?

There's too many "specs" to juggle. Boil it down and make it simple enough for us cavemen dummies.

[KnifeMaker]

Dan, is there any one "spec" that stands out as a prime indicator of a lubricant's propensity to detonate in the YH? That is, a go/no-go flag?

There's too many "specs" to juggle. Boil it down and make it simple enough for us cavemen dummies.

You want the det. to be e above 475 to 500f and remember, most oils are designed to carry contaminates with it in order to be filtered. Our compressors require an oil that drops it out of suspension and onto the crank case floor. Royal Purple  Tech. has already stated that their oil is not suited to hp compressor use.
 
Knife

[Airnut]

Jeff
That cant be done.
The truth is that there has been a lot of failures regardless of what oil has been used.
 People have got to except that these things are a ticking time bombs with their sketchy design and engineering.
Its not a matter of if they are going to fail its when.
I have had mine now for about 3 years and use it once or twice weekly to fill up a small 90cui bottle without a hint of trouble.
Am i using the best oil? Who knows!! I have heard of failures with the oil I use.
Just for the record I use A.V. hp compressor oil with water wetter and a pond pump and larger dia. hoses.
Is that the reason mine has not failed yet? I doubt it !! I just got a good one with tight tolerances.

[KnifeMaker]

Jeff
That cant be done.
The truth is that there has been a lot of failures regardless of what oil has been used.
 People have got to except that these things are a ticking time bombs with their sketchy design and engineering.
Its not a matter of if they are going to fail its when.
I have had mine now for about 3 years and use it once or twice weekly to fill up a small 90cui bottle without a hint of trouble.
Am i using the best oil? Who knows!! I have heard of failures with the oil I use.
Just for the record I use A.V. hp compressor oil with water wetter and a pond pump and larger dia. hoses.
Is that the reason mine has not failed yet? I doubt it !! I just got a good one with tight tolerances.

No to mention that; Your not stressing  it what so ever. One small bottle once a week. Which would be an unrealistic 52 fill as year, weather permitting.
I for instance  fill two full sized 88 cf scba bottle s at least 4-5 days a week So say between 416  to a very conservative 520 fills a year in bottles Much-Much larger. So no wonder no issues. There shouldn't be any.  Many of us on the other hand have to very vigilant to keep the working properly.


Knife

[KnifeMaker]

and any tricks to making them last longer would be appreciated

 thanks ...DH...

.. just getting in to more advanced equipment myself so i can give a few personal mental notes on the hung long .. first its not a high end compressor and 'oil' isnt going to save it, extend its life or nothing of the sort, yeah use a good oil and change it occasionally, thats 'basic' and understood, so is keeping it cool enough, use a dam fan to lol .. the pump is designed to be an alternative to 'you' going to the shop to refill your tank(s) $-wise, so likely you wont save any money with this pump before it breaks but you will be capable to fill your tanks at home for the same money until it does ... the exceptions now .. in my own opinion researching and looking at it -

the 'real' enemy of the pump is condensation and moisture left in the parts after use .. if you are mechanically inclined enough to be able to disassemble things and reassemble without damaging anything you can likely prolong its life quite a bit past its designed 'die rate' ... the cylinder and piston itself i dont think needs to be disassembled ,but EVERY manifold, line, fitting, check valve, and related oring needs to be cleaned, dried and treated after EVERY days use or before storage more than a day lets put it that way ... also the water jacket needs to be sprayed out with a protectant like they make for pressure washer pumps ... do that, and it should last a long time trouble free .. the way i have it figured 15 minutes to partially break things down and do all that 'after' the initial figuring it out and learning things .. so, maybe not a 'trick' . but the 'hard skinny' lol .. like I* said, use it like you stole it and you'll likely get your moneys worth anyway ..

And yet another one. At a much reduced life span my friend! The water jacket does not have to be removed and sprayed. Simply use a touch of anti freeze that is designed to prevent corrosion in alu. engines or cylinder heads  That's all. Do run it a few minutes with all bleeds open to clear any condensate  from the cylinders.


I so wish people would not give advice as fact when they simply do not really know hat they are talking about.
another poster stated that the Mobil Rarus and he other hp oils are all the same Well, they are NOT! Mobil Rarus 827 is the longest period interval and  run time in industrial hp compressor oil available. It is however not dive rated. Chem lube, (Coltri and Nuvair) is. So obviously, not the same at all. More bad advice born out of ignorance.  this is starting to bug me! And yes, I'm using such childish language to express it as the GTA won't allow me to really day what I am feeling. GRRRRRR!!!!


If you don't know what your talking about, don't give advice to members as fact. Please!!!  I'm going to go and kick some grass now. 

[KnifeMaker]

Jeff
That cant be done.
The truth is that there has been a lot of failures regardless of what oil has been used.
 People have got to except that these things are a ticking time bombs with their sketchy design and engineering.
Its not a matter of if they are going to fail its when.
I have had mine now for about 3 years and use it once or twice weekly to fill up a small 90cui bottle without a hint of trouble.
Am i using the best oil? Who knows!! I have heard of failures with the oil I use.
Just for the record I use A.V. hp compressor oil with water wetter and a pond pump and larger dia. hoses.
Is that the reason mine has not failed yet? I doubt it !! I just got a good one with tight tolerances.

Please list one, if any example of a unit failing when the proper lube was used from the beginning. ONE!!! then I will research it further. Until then, another WAG given as fact.  I'm sick  it!

[aimsmall]

and any tricks to making them last longer would be appreciated

 thanks ...DH...

.. just getting in to more advanced equipment myself so i can give a few personal mental notes on the hung long .. first its not a high end compressor and 'oil' isnt going to save it, extend its life or nothing of the sort, yeah use a good oil and change it occasionally, thats 'basic' and understood, so is keeping it cool enough, use a dam fan to lol .. the pump is designed to be an alternative to 'you' going to the shop to refill your tank(s) $-wise, so likely you wont save any money with this pump before it breaks but you will be capable to fill your tanks at home for the same money until it does ... the exceptions now .. in my own opinion researching and looking at it -

the 'real' enemy of the pump is condensation and moisture left in the parts after use .. if you are mechanically inclined enough to be able to disassemble things and reassemble without damaging anything you can likely prolong its life quite a bit past its designed 'die rate' ... the cylinder and piston itself i dont think needs to be disassembled ,but EVERY manifold, line, fitting, check valve, and related oring needs to be cleaned, dried and treated after EVERY days use or before storage more than a day lets put it that way ... also the water jacket needs to be sprayed out with a protectant like they make for pressure washer pumps ... do that, and it should last a long time trouble free .. the way i have it figured 15 minutes to partially break things down and do all that 'after' the initial figuring it out and learning things .. so, maybe not a 'trick' . but the 'hard skinny' lol .. like I* said, use it like you stole it and you'll likely get your moneys worth anyway ..

And yet another one. At a much reduced life span my friend! The water jacket does not have to be removed and sprayed. Simply use a touch of anti freeze that is designed to prevent corrosion in alu. engines or cylinder heads  That's all. Do run it a few minutes with all bleeds open to clear any condensate  from the cylinders.


I so wish people would not give advice as fact when they simply do not really know hat they are talking about.
another poster stated that the Mobil Rarus and he other hp oils are all the same Well, they are NOT! Mobil Rarus 827 is the longest period interval and  run time in industrial hp compressor oil available. It is however not dive rated. Chem lube, (Coltri and Nuvair) is. So obviously, not the same at all. More bad advice born out of ignorance.  this is starting to bug me! And yes, I'm using such childish language to express it as the GTA won't allow me to really day what I am feeling. GRRRRRR!!!!


If you don't know what your talking about, don't give advice to members as fact. Please!!!  I'm going to go and kick some grass now. 

I can't find where mobil states their change interval but I can tell you amsoil compressor oil is rated for 8k hour changes for normal use.
I'm going to say with pretty good confidence, amsoil has the longest running change interval hands down. But I'm curious what mobil recommends.
Neither oil is recommended for breathing applications which you stated.
Amsoil flash point is higher than mobil,and it's viscosity index is better.
Can't find the four ball wear test for mobil but amsoil lists theirs.
Not knocking mobil, I run it in my truck., but I don't think it's the best option available for our use of HPA compressors.
It is a good choice none the less.

[Fate]

There's a lot of Chicken Little in this thread.

I don't use the fancy oil touted here, but it's a long shot better than what was suggested in the information provided with my YH. And it's good enough to be used by a lot of others... just not in this community. For me it's been perfect.

I do like to keep up with the YH threads though. Reminds me of my car forums, and oil threads. LMBO

Not wishing my own any ill well here, but if it breaks, so be it. Just means I can get a good one now that I know I'm happy with PCPs. Maybe then I'll worry about the oil? Probably not.

[Randy00]

I wish I could have used the Chemlube for more than an hour but that's all my compressor could take of it I guess. I do have an old shop compressor that could use an oil change though, so it won't go to waste. If that one craps out from it, it's not as big a deal. Just an excuse to replace a HF pancake.

[tracker1955]

When I was looking for an oil to use in mine I was looking at three factors, viscosity, full synthetic, and flashpoint. I also sometimes wonder if some of the failures I've read about have been due to overfilling the crankcase. If too much oil makes its way up into the second stage (more than is required to just keep it lubricated), The excess oil could pool on top of the second stage piston and cannot be compressed like air and could likely cause a piston failure.

[Randy00]

When I was looking for an oil to use in mine I was looking at three factors, viscosity, full synthetic, and flashpoint. I also sometimes wonder if some of the failures I've read about have been due to overfilling the crankcase. If too much oil makes its way up into the second stage (more than is required to just keep it lubricated), The excess oil could pool on top of the second stage piston and cannot be compressed like air and could likely cause a piston failure.

I agree. If someone doesn't pay attention to the level it can cause some real problems..

[Airnut]

Jeff
That cant be done.
The truth is that there has been a lot of failures regardless of what oil has been used.
 People have got to except that these things are a ticking time bombs with their sketchy design and engineering.
Its not a matter of if they are going to fail its when.
I have had mine now for about 3 years and use it once or twice weekly to fill up a small 90cui bottle without a hint of trouble.
Am i using the best oil? Who knows!! I have heard of failures with the oil I use.
Just for the record I use A.V. hp compressor oil with water wetter and a pond pump and larger dia. hoses.
Is that the reason mine has not failed yet? I doubt it !! I just got a good one with tight tolerances.

Please list one, if any example of a unit failing when the proper lube was used from the beginning. ONE!!! then I will research it further. Until then, another WAG given as fact.  I'm sick  it!

LOL You need to go and read post #317 again! 
Dont get me wrong I am not saying that royal purple is the proper oil.
All I am saying that we have had failures regardless of oil used.
If you get a machine with loose tolerances then the best oil in the world ain't going to save it.
Not a WAG just fact!

[Airnut]

When I was looking for an oil to use in mine I was looking at three factors, viscosity, full synthetic, and flashpoint. I also sometimes wonder if some of the failures I've read about have been due to overfilling the crankcase. If too much oil makes its way up into the second stage (more than is required to just keep it lubricated), The excess oil could pool on top of the second stage piston and cannot be compressed like air and could likely cause a piston failure.

Very possible!
Thats the thing. When we here of failures we dont really know how the machine was used and maintained. We are quick to jump to conclusions and blame it on the oil.

[Dan H]

Guys read back threw this thread , you will see guys that have used the chemlube 751 or equivalent from day 1 - have not had very many problems compared to running royal purple or other low pressure compressor oils that should never be used ..... so please read back threw this thread its all here , and if you don't believe us just call the manufacture of these low pressure compressor oils and they will tell you that their oil is not I REPEAT NOT ! designed for this application  hard to believe people dont get this with all the information right in front of them ,and the earth is really round not flat !  ....    

[KnifeMaker]

Dan, I ran out of "Here's your Sign" Post. Common sense is running off many members backs like water on a duck I probably should give up. What is the old saying, You can't fix Stupid!
You tried as well Sir!  Thank you for your efforts. 


Knife
Poor  Poor little compressor. Choked to death. never had a chance. Murder weapon? Wrong oil!

[KnifeMaker]

Jeff
That cant be done.
The truth is that there has been a lot of failures regardless of what oil has been used.
 People have got to except that these things are a ticking time bombs with their sketchy design and engineering.
Its not a matter of if they are going to fail its when.
I have had mine now for about 3 years and use it once or twice weekly to fill up a small 90cui bottle without a hint of trouble.
Am i using the best oil? Who knows!! I have heard of failures with the oil I use.
Just for the record I use A.V. hp compressor oil with water wetter and a pond pump and larger dia. hoses.
Is that the reason mine has not failed yet? I doubt it !! I just got a good one with tight tolerances.

Please list one, if any example of a unit failing when the proper lube was used from the beginning. ONE!!! then I will research it further. Until then, another WAG given as fact.  I'm sick  it!

LOL You need to go and read post #317 again! 
Dont get me wrong I am not saying that royal purple is the proper oil.
All I am saying that we have had failures regardless of oil used.
If you get a machine with loose tolerances then the best oil in the world ain't going to save it.
Not a WAG just fact!

Apparently your reading comprehension really blows today. I said used from the get go. Not after poor oil for a time first. But Here's your sign. You earned it!  It reads, Stupid is as Stupid does.

[KnifeMaker]

What locked up?  Where's the point of failure?  Pictures?

Mine just seized up after 10 minutes of use yesterday. Only thing I have done differently is I switched from RP to Chemlube.. .. Probably has nothing to do with it. I had about 18 hours on it using RP and under 1 hour with chemlube and when I had it open to replace the gaskets a while back it was in pristine condition with the Rp. It had about 10 hours on it after I replaced the gaskets with RP.  I'll crack it open again and see what happened. But I'm sure it's just a coincidence that I just switched over to the better lube less than an hour before it died..   

I said "I'll crack it open" ..that's a future tense statement.

Here it is.. More carbon than I have ever seen. Top of the piston sheered off and the cylinder walls are ruined. This is after less that an hour using it. So.. back to Royal Purple for me if I decide to rebuild this thing.

That carbon built up over a long period of time. It was far too late for the proper oil to fix the neglect.


Knife

[KnifeMaker]

The brass should not have scored the cylinder walls, they are steel.  All you should need is one of these.

https://www.aliexpress.com/item/4000619417179.html?spm=a2g0o.cart.0.0.28d33c0015Lt3y&mp=1

the carbon most certainty will! Another sign given out!

[KnifeMaker]

Randy
Sorry for your bad luck.
You are case in point why there is so many different options on what is the best oil to use.
It dont really seam to matter what you run.
You either get a good one or a bad one.

This was one of the good ones I guess.. so many hours with Royal Purple then I put the other stuff in and..ruined..

So many signs to give out! And another one bites the dust!
Knife