Author Topic: Vevor compressor failed (Read 24191 times))

Killfire · « **Reply #20 on:** May 15, 2018, 05:10:29 PM »

Quote from: Tweeter on May 15, 2018, 03:26:35 PM

Quote from: Killfire on May 15, 2018, 11:26:57 AM
If the second stage rings ate a problem, you might be able to drop in a tuxing piston assy with the split rings. I have a spare one if you want to try it. I also have a tuxing top end as well.

Thanks for the offer I appreciate it and I may take you up on it as long as you'll allow me to pay for it. Can you get measurements on the piston, I can measure my piston and bore when I have it apart this afternoon? It would be interesting to see if tuxing, yong heng and any other chinese compressor pistons are compatible with different brands/types.

Sure thing. I'll try to remember when I get home. It also could be a check valve that isn't letting it build pressure.

Tweeter · « **Reply #21 on:** May 15, 2018, 05:21:29 PM »

I forgot about the check valve!!!!! I am in the process of tearing it apart now and thought I would check here just for the heck of it. After reading your post I located the check valve and it does look a little deformed. Honestly everything else looks pretty good. Some carbon build up on the second stage piston but no obvious damage to rings piston or bore. I got pictures and will upload em tonight. For now I'm gonna slap this baby back together (with the spare check valve I got with the compressor) and see if that does it. Hope the ring gap position doesnt matter on these? Oh and just from looking down into the bottom end I see no metal shavings whatsoever. Will take the cover off and clean it still though.

Tweeter · « **Reply #22 on:** May 15, 2018, 06:24:52 PM »

Well now I REALLY wish I would have read your post about the check valve BEFORE I tore my compressor down completely.

Kill fire you are the man!!! I put everything back together, replaced that check valve, put the dead head onto the fill hose and fired it up.... 4500 psi in seconds! Oh well maybe this thread will save somebody the trouble in the future.

Still going to test it with a full fill on my gun to make sure it's back in action, the second stage ring did fit a little loose when I put it back together but so far so good! Thanks guys! Will still upload pics so everyone can see the guts of the famed VEVOR air pump!

Killfire · « **Reply #23 on:** May 15, 2018, 06:32:46 PM »

Quote from: Tweeter on May 15, 2018, 06:24:52 PM

Well now I REALLY wish I would have read your post about the check valve BEFORE I tore my compressor down completely.

Kill fire you are the man!!! I put everything back together, replaced that check valve, put the dead head onto the fill hose and fired it up.... 4500 psi in seconds! Oh well maybe this thread will save somebody the trouble in the future.

Still going to test it with a full fill on my gun to make sure it's back in action, the second stage ring did fit a little loose when I put it back together but so far so good! Thanks guys! Will still upload pics so everyone can see the guts of the famed VEVOR air pump!

No problem, glad you fixed it with parts you already had! Here are the piston measurements anyways.

WiseGuy · « **Reply #24 on:** May 15, 2018, 06:37:01 PM »

Justin,

Glad you were able to find the simple fix, and glad those do come with this compressor as spares from the factory. So looks like I feel more confident in my purchase afterall

...This is still a very good thread to save with this new found info. Thanks again. Looking forward to the pics too.

Tweeter · « **Reply #25 on:** May 15, 2018, 06:50:23 PM »

Thanks Jimmy, I'm glad it was simple too. I learned my lesson, try the simple things before completely disassembling something!

Heres the pics in no particular order. A little carbon on the piston but not too bad it cleaned up easily. In the pic of the small black plastic check valve you can see how the tip is kind of ballooned out. I think maybe this caused it to stick open??? I should have taken a picture side by side with the new one so you could see the difference between them. Also if anybody needs to know where this check valve goes I can take a picture showing you the fitting it and the spring sit behind. Simple to just undo that fitting, take the spring and valve out and replace with new. You can also see how the second stage ring is attached to the piston with a flat head screw. If we can find replacements these would be dead easy to replace. Easier than the YH I would imagine. Just remove the screw and replace the rings. The offending check valve is the last photo.

Tweeter · « **Reply #26 on:** May 15, 2018, 06:57:35 PM »

The check valve sits behind this fitting that I circled in blue so when the air comes in the intake it can't leave the same way it came in. Kind of hard to see but its right below the pressure gauge...

WiseGuy · « **Reply #27 on:** May 15, 2018, 07:03:31 PM »

Thanks for all the info and pics Justin, if and when mine should break down, this thread will be the first I check again.

Tweeter · « **Reply #28 on:** May 15, 2018, 07:07:12 PM »

Absolutely bro, hope it helps you in the future.

Tweeter · « **Reply #29 on:** May 15, 2018, 07:13:08 PM »

Quote from: Killfire on May 15, 2018, 06:32:46 PM

Quote from: Tweeter on May 15, 2018, 06:24:52 PM
Well now I REALLY wish I would have read your post about the check valve BEFORE I tore my compressor down completely.

Kill fire you are the man!!! I put everything back together, replaced that check valve, put the dead head onto the fill hose and fired it up.... 4500 psi in seconds! Oh well maybe this thread will save somebody the trouble in the future.

Still going to test it with a full fill on my gun to make sure it's back in action, the second stage ring did fit a little loose when I put it back together but so far so good! Thanks guys! Will still upload pics so everyone can see the guts of the famed VEVOR air pump!
No problem, glad you fixed it with parts you already had! Here are the piston measurements anyways.

Thanks for the measurements Jason, that looks to be the same piston as mine except for obviously the gold part. It may just work if them small second stage rings are the same diameter as mine??? In the future I may try it...

Killfire · « **Reply #30 on:** May 15, 2018, 08:59:19 PM »

The second stage rings are split so they're a little large and resist going into the head when new. Once they break in they fit very well.

BigMike1 · « **Reply #31 on:** May 15, 2018, 09:45:56 PM »

Great !! It is good info .. glad you compressor is up and running !

MJP · « **Reply #32 on:** May 16, 2018, 03:08:55 AM »

Tweeter, any machinist can make you the spare second stage seals. Just buy some graphite impregnated ptfe rod for the material.
Very easy part to make on a manual lathe, and super fast to make a lot on a cnc.

What compressor oil are you using, specifically for hpa?
Looks like a lot of carbon buildup to me, I'm guessing regular compressor oil?

Marko

Tweeter · « **Reply #33 on:** May 16, 2018, 07:39:49 PM »

Quote from: Killfire on May 15, 2018, 08:59:19 PM

The second stage rings are split so they're a little large and resist going into the head when new. Once they break in they fit very well.

Good to know thanks. From my experience this is how any piston rings should be, mine went in a little too easily so its probably on the way out.

Tweeter · « **Reply #34 on:** May 16, 2018, 07:41:20 PM »

Quote from: MJP on May 16, 2018, 03:08:55 AM

Tweeter, any machinist can make you the spare second stage seals. Just buy some graphite impregnated ptfe rod for the material.
Very easy part to make on a manual lathe, and super fast to make a lot on a cnc.

What compressor oil are you using, specifically for hpa?
Looks like a lot of carbon buildup to me, I'm guessing regular compressor oil?

Marko

Yup just regular compressor oil. I had a bottle that I picked up when I originally bought the compressor but just used the last of it now. Plan to start using Royal purple synthetic on the next oil change.

MJP · « **Reply #35 on:** May 17, 2018, 02:54:25 AM »

Wrong oil for HPA compressor use, not designed for hpa compressors.
Coltri or Bauer make real hpa compressor oils, and so does chemlube I think. Ce750 or iso vg150 oils, they are slightly thicker and are not so prone to selfignite.

Why on earth use 300-400$ on compressor then go cheap on the oil?
I wouldn't dare to run anything other than hpa oils on my hpa compressor.

Marko

Tweeter · « **Reply #36 on:** May 17, 2018, 05:03:52 AM »

Quote from: MJP on May 17, 2018, 02:54:25 AM

Wrong oil for HPA compressor use, not designed for hpa compressors.
Coltri or Bauer make real hpa compressor oils, and so does chemlube I think. Ce750 or iso vg150 oils, they are slightly thicker and are not so prone to selfignite.

Why on earth use 300-400$ on compressor then go cheap on the oil?
I wouldn't dare to run anything other than hpa oils on my hpa compressor.

Marko

The oil has been working just fine, it had nothing to do with why my compressor quit but I'll let you know when it fails again. Most have been running #46 hydraulic oil in theirs (what the manual calls for) and have not had any trouble and lots have been using regular compressor oil as well without issues. I did plenty of reading before deciding which oil to use. Not interested in turning this into an oil thread

avator · « **Reply #37 on:** May 17, 2018, 08:37:07 AM »

Glad to see you got it up and running Jerry..
BTW... good luck trying to keep a thread on topic...

Xraycer · « **Reply #38 on:** May 17, 2018, 09:10:59 AM »

Great info guys!

Tweeter · « **Reply #39 on:** May 17, 2018, 05:14:49 PM »

Quote from: avator on May 17, 2018, 08:37:07 AM

Glad to see you got it up and running Jerry..
BTW... good luck trying to keep a thread on topic...

Normally I don't care if a thread I started goes off topic if people are chatting it up and having fun it's all good with me. The "Which oil should I use?" threads are always an adventure though where everyone ends up agreeing to disagree

.

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Vevor compressor failed

Author Topic: Vevor compressor failed (Read 24191 times))