Author Topic: Vevor compressor failed (Read 24236 times))

Tweeter · « **Reply #60 on:** May 30, 2018, 08:07:27 PM »

The problem isn't the oil, the problem is that the oil is making it past the second stage piston rings. This kind fellow used extra special super blend BAUER oil and the top blew off his compressor. I think that the single Vevor piston ring is just a bad design and use whatever expensive oil you like it won't fix it. Be sure to check page 2

http://nzairgun.com/forum/index.php?topic=2171.0

Now if you'll excuse me, I have to go put some Delo 400 in my Ducati

MJP · « **Reply #61 on:** May 31, 2018, 12:00:43 AM »

Well I don't know but did he say no dieseling at all with new rings in the beginning?
How much earlier it would have blown with other cheap oil not intended for hpa use?

Did you notice the reason why it blew, LACK OF MAINTENANCE!

I have been trying to say that just this is the reason I recommend proper oils, and proper maintenance of your HPA equipment, had he been over the compressor shutting it off when it exploded we would probably have been reading a different story and he wouldn't have laughed!

High pressure air is no joke, I don't laugh at all if something like this happens.
I can't understand how people take it so lightly, just to save couple of bucks.

Marko

Tweeter · « **Reply #62 on:** May 31, 2018, 04:56:34 AM »

Exactly, lack of maintenance. But lack of maintenance or our choice of lubrication isn't why our VEVOR compressors are failing us.

And nobody is taking HPA lightly we all know how dangerous it can be.

WiseGuy · « **Reply #63 on:** May 31, 2018, 11:00:26 AM »

Well, not really knowing where the second stage check valve was, I figured I'd remove the line that feeds into the block where the guage sits and the bleed valve for the high side are in. I did not find any valve with a spring like the other line had, however this line was super dirty. It also had some obstruction in the line, initially I thought it was probably a completely destroyed plastic type check valve like the other one is made from, but this obstruction was made of metal. I cleaned the ends of the line and connectors the best I could and reassembled. No good, still no pressure past 300 psi.

There is only one more line to remove and check, I guess I can try that one next tonight. Here are some pictures I took along the way.

the obstruction inside the metal line...

the metal piece of obstruction removed...

tried to clean off all the gunk off the connector and line as best I could...look at the rag, dirty gunk

high pressure side block outlet...cleaned it out best I could too...

this is where I thought that check valve was going to be sitting at...but nothing...cleaned this out too...

I guess I'm going to need to tear down a little further to find out what's wrong with it, funny thing is, it sounds strong and no leaks that I can tell. I did notice that only one metal pipe gets hot and the other two dont anymore. I'm guessing because the pressure it not passing thru them.

MJP · « **Reply #64 on:** May 31, 2018, 04:48:45 PM »

You need to take the head off, the valve is in the head. At least it should be there, a small disk type valve.

Marko
Edit: the highside check valve looks to be on top of the head, under the brass housing. Look at the picture on the previous page.

WiseGuy · « **Reply #65 on:** May 31, 2018, 05:08:19 PM »

Quote from: MJP on May 31, 2018, 04:48:45 PM

You need to take the head off, the valve is in the head. At least it should be there, a small disk type valve.

Marko
Edit: the highside check valve looks to be on top of the head, under the brass housing. Look at the picture on the previous page.

I see the picture of it! I plan to take the head off to inspect and clean everything real good and put back together and will report back. Thanks again guys!

WiseGuy · « **Reply #66 on:** June 02, 2018, 10:24:39 PM »

I Fixed it! Up and running again after a complete tear down, a very good cleaning and the only thing that I replaced only because I had torn it down that far was the second stage little ring (comes with 2 spares when you buy the compressor), not because it looked bad, only because I just wanted to, so don't really know if that was the fix or not. Also, there is a screw with a filter of some type in the first stage block that on mine had completely fallen off and maybe was obstructing or binding something in that block and maybe that was the reason also for my compressor not making it past 300-400 psi...not really sure, but I cleaned EVERYTHING really good and assembled everything back together. Checked o-rings, cleaned carbon and oil from everywhere I could, and did an oil change while I was at it. Total tear down, taking pics along the way and reassembly was around 2 hours. I also attached my new filter that just came in from Lethalair, this thing is sweet! and I think it will help even more with the moisture trapping. Happy to report it fired right up and pressurized the filter in seconds!

underneath this silver nut is an additional screw with some type of filter that on mine had completely fallen down and into it self...

here is the screw and filter inside...

I'm thinking this might have been my problem...screwed them back into each other and cleaned out that block...

reassembled and cleaned...

started to take off the top part of the head...a little carbon and very little oil...cleaned it up really well and checked that o-ring, looked good and reused it...

cleaned up...

next part to come off revealing the shaft and second stage ring...cleaned everything really well...

a view of the bore and shaft before I pulled everything off to give it a good cleaning...

second stage ring looked good and not deformed or warned out yet...but I still changed it since I was in there already...the compressor comes with two spares...I did noticed when I took the old one off that there was some type of loctite on the threads, so I applied some blue loctite on the new installed ring...

digging down a little further...

oil was a little dirty...but no metal shavings of any type...

pulled out the piston and gave it a good cleaning and re-aligned the rings spacing them out evenly so the openings where not in the same position to each other...

cleaned out the bore and lightly re-lubed it...

first stage rings look good...

this is the second stage ring and the only thing I changed, old on left, new on the right, I saved the old since it looked good to me still...

applied blue locktite to the threads...

piston and bore all cleaned and ready to be reinstalled...

all the bits and parts that I thouroghly cleaned up...

All done and with new filter mounted to the side...

up and running again!...all in all, very easy to tear down and clean and replace any part...

avator · « **Reply #67 on:** June 03, 2018, 08:10:35 AM »

Good job guys....
Great pics and descriptions with awesome results.. Ya'll undoubtedly did things that they didn't take the time to do from the factory given the rate that these things flooded the market.

Tweeter · « **Reply #68 on:** June 03, 2018, 08:29:24 AM »

Glads to see you got it running again Jimmy! Mine didn't come with any spare rings, only spare tampons and that check valve. Too bad there isn't a complete rebuild kit for sale somewhere....

WiseGuy · « **Reply #69 on:** June 04, 2018, 11:48:32 AM »

For anyone interested, I got the manual for these compressors from the vendor on eBay. From looking at the manual, it appears that the fix for not building up pressure is to clean the second stage check valve located at the top of the head of the compressor, very easy to get to and clean out real quick. I tried to post the PDF file of the manual, but it will not upload. You can send me a PM and I'll email it to you.

Additionally, it tells you how to properly start these little compressors up. BOTH bleed valves have to be open, prior to turning on the machine. Then turn it on, close the bleed valves and start filling.

Tweeter · « **Reply #70 on:** June 04, 2018, 02:17:55 PM »

I wonder if thats what fixed our compressors Jimmy. basically the fact that we took em apart, cleaned and re-assembled. When I took mine apart the only thing I changed was that check valve so I assumed that is what fixed it but maybe it was the other check valve? Also used mine many times since then and it has been working fine though I am worried about blow by with my second stage piston ring fitting so loose. Waiting to hear back from Lethalprecision to hopefully buy a pile of them

Tweeter · « **Reply #71 on:** June 04, 2018, 02:20:09 PM »

Thanks for the manual Jimmy! Huh, I didn't even know there was a check valve under the burst disk?!?! Good to know!

WiseGuy · « **Reply #72 on:** June 04, 2018, 02:25:27 PM »

Yeah, I really think the cleanup job is what fixed our compressors. The second stage check valve sits right under the blow disk. Very easy to take out and clean. Let me know if you do get spares from Lethalairprecion..either way, looks like something that can easily be 3D printed.

Tweeter · « **Reply #73 on:** June 04, 2018, 02:36:13 PM »

I've also emailed vendors on Aliexpress that sell the same complete head assembly for our compressors and they all asked me the same thing "Is it yong heng brand?"

"No it is NOT YONG HENG brand, it is the brand of this head assembly that YOU advertise for sale in YOUR online store!!!" Whatever you call it do you have ANY SPARE PISTON RINGS?!?!?!?!?!?

And then they say that sorry, they only sell yong heng brand lol

Tweeter · « **Reply #74 on:** June 04, 2018, 02:37:53 PM »

If anybody finds some of these second stage rings for sale I will gladly part with some of my hard earned cash for a few lol. An adventure to say the least, looking for parts for these things.

WiseGuy · « **Reply #75 on:** June 04, 2018, 02:40:25 PM »

Quote from: Tweeter on June 04, 2018, 02:36:13 PM

I've also emailed vendors on Aliexpress that sell the same complete head assembly for our compressors and they all asked me the same thing "Is it yong heng brand?"

"No it is NOT YONG HENG brand, it is the brand of this head assembly that YOU advertise for sale in YOUR online store!!!" Whatever you call it do you have ANY SPARE PISTON RINGS?!?!?!?!?!?

And then they say that sorry, they only sell yong heng brand lol

Maybe, just say yes, and see what they send you? LOL...I'm going to make a stencil and spray paint "Yong Heng" on mine and send them a pic LOL...maybe that will do the trick!

Tweeter · « **Reply #76 on:** June 04, 2018, 02:48:26 PM »

Haha thats a good idea.

Xraycer · « **Reply #77 on:** June 04, 2018, 05:35:31 PM »

Here's the manual in pics. Just click to enlarge, and print it out for yourself.

Thanks to Jimmy for the file!

WiseGuy · « **Reply #78 on:** June 04, 2018, 05:50:14 PM »

Nice work Dinh!

Xraycer · « **Reply #79 on:** June 04, 2018, 05:51:48 PM »

Quote from: WiseGuy on June 04, 2018, 05:50:14 PM

Nice work Dinh!

Thank you to our advertisers!

Vevor compressor failed

Author Topic: Vevor compressor failed (Read 24236 times))