Author Topic: Vevor compressor failed (Read 24224 times))

avator · « **Reply #40 on:** May 17, 2018, 05:30:24 PM »

Yep.... it's kinda like.... "It's mine, I'll wash it as fast as I wa...... no, wait.... that's another forum... my bad.

Tweeter · « **Reply #41 on:** May 17, 2018, 06:55:29 PM »

Finally had time after work today to try filling my gun. The little VEVOR filled the 350cc bottle from 2200-3600psi in under a minute as usual

So it had to be that check valve as that was the only thing I changed.

Killfire hooked me up with a Tuxing complete head assembly/ piston and spare parts so the next time it gives me trouble I will swap them on that way I will be able to find parts easily in the future. Thanks Jason!

One more tidbit, when I put the piston back into the cylinder I clocked the ring gaps 120 degrees apart. There are 3 rings/gaps so just space them evenly and make sure they aren't all lined up together. I don't think it has to be perfect

MJP · « **Reply #42 on:** May 18, 2018, 01:46:34 AM »

Oh yeah, working just fine. Dont mind a little carbon deposits on my cylinders...
Seems to me like some combustion occurring in the cylinder, but hey its just more pressure right?

Looks like most of people are only considered the cost at the moment of purchase to me.
All I can say that have respect on the high pressure you are producing with your reliable good quality machine using The oil that the manufacturer recommended who is interested in one thing only and that is YOUR money, not your life or your wellbeing only your money.

There are incidents with real scuba compressors exploding even with the correct oil for lack of maintenance or disregarding some aspects of usin proper procedure.

But hey, what do I know. And apologies for distracting your thread with meaningless oil discussions.

Marko

Tweeter · « **Reply #43 on:** May 18, 2018, 05:37:07 AM »

Hey if its unsafe to use regular compressor oil I will change it before I use it again. Can anybody tell me if Royal Purple Synthetic Recip 100 will make my compressor explode? Is that good enough for my reliable good quality machine?

I wonder how much money the manufacturer makes off all the #46 hydraulic oil everybody buys at Pepboys?

MJP · « **Reply #44 on:** May 18, 2018, 11:11:29 AM »

He makes money by selling parts the poor oil destroys thats all.

Marko

hollowpoint1911 · « **Reply #45 on:** May 18, 2018, 02:13:29 PM »

Yup, this just turned into a oil thread.

Tweeter · « **Reply #46 on:** May 18, 2018, 02:56:30 PM »

Quote from: hollowpoint1911 on May 14, 2018, 11:06:41 PM

Hey Justin,
Sorry, brain fart on my part, if I would have taken 2 minutes to go look at the Vevor piston assembly I have, I would have known the 2nd stage seal wasn't just a normal oring.

Anyway, once you figure out which part failed, I would suggest contacting "Joto Valve and Pump Store" on AliExpress. They sell the "Vevor style" cylinder head, so there shouldn't be a problem getting other replacement parts (aside from the slow shipping from China).

Here's a link to a listing from Joto where they sell the cylinder head. Just use the page to contact them and ask for whatever it is you need.
http://s.aliexpress.com/RjuUjuQ7

I emailed Joto and they swear that they dont have or sell any parts for my compressor. Even after I sent them pictures of everything and also the picture from their ad of the head assembly. They said they only sell yong heng stuff? Maybe language barrier? I will be converting my compressor to Tuxing anyhow and then I can buy piston rings on ebay for $8

Tweeter · « **Reply #47 on:** May 18, 2018, 02:58:27 PM »

I'm not going to buy a complete head/piston assembly everytime I need a second stage ring lol

Xraycer · « **Reply #48 on:** May 22, 2018, 12:57:30 AM »

This past weekend I did my second fill with my Vevor. It took about 20 minutes to fill from 200bars to 300bars. Even with a bucket with 20lb of ice, the temp still got to 57C.
I only worked a half day today, so after my dental appointment, I proceeded to tear down the Vevor. Just to see if there was anything out of the ordinary. During the teardown I found it a piece which don't know where it dropped out of. Rereading this thread, it looks to be like the check valve you were referring to.
So, where does this check valve and spring actually go?

MJP · « **Reply #49 on:** May 22, 2018, 01:42:14 AM »

I think it goes in to the fitting you put it next to, conical part pointing to he cylinder.

Marko

Edit: yep, thats the correct place for it, Tweeter put a picture on the second page circled in blue.

Tweeter · « **Reply #50 on:** May 22, 2018, 05:04:39 AM »

Dinh, it sits behind this fitting circled in blue.

Tweeter · « **Reply #51 on:** May 22, 2018, 05:09:00 AM »

Whoops, just noticed that MJP already pointed it out. My brain isn't on yet, its 4am

Xraycer · « **Reply #52 on:** May 22, 2018, 07:03:41 AM »

Thanks, guys!

WiseGuy · « **Reply #53 on:** May 22, 2018, 11:29:21 AM »

Dinh,

So was there anything out of the ordinary? My temps have reached 56-59 and I've only topped off my 30 min scba tank twice in the last month or so and I'm keeping a log of run times and pressures filled, just to know how much I've actually ran the compressor. I use a tin bucket that seems to keep the cold ice water cooler for a longer time. The first time I topped off the my tank was from around 2600 psi to 4300 in 17 mins and reached 59 on the temp guage. The second time I only ran it 7 mins to top of my tank and that went up to 48 on the temp guage.

Xraycer · « **Reply #54 on:** May 22, 2018, 12:28:38 PM »

Quote from: WiseGuy on May 22, 2018, 11:29:21 AM

Dinh,

So was there anything out of the ordinary? My temps have reached 56-59 and I've only topped off my 30 min scba tank twice in the last month or so and I'm keeping a log of run times and pressures filled, just to know how much I've actually ran the compressor. I use a tin bucket that seems to keep the cold ice water cooler for a longer time. The first time I topped off the my tank was from around 2600 psi to 4300 in 17 mins and reached 59 on the temp guage. The second time I only ran it 7 mins to top of my tank and that went up to 48 on the temp guage.

I've stripped it down last night, but haven't had a chance to take a really close look at everything. The only thing that was obvious so far is that I found a filter that had broken loose inside the bronze colored block on the compressors right side. It must have worked its way loose from all the vibration. I'll try to get a picture tonight of this tonight. My son has soccer practice tonight and tomorrow night, so not a lot of time for a thorough inspection.

WiseGuy · « **Reply #55 on:** May 30, 2018, 01:04:05 AM »

Well, my compressor failed tonight, this would have been the 4th time using it. Will not make any pressure past 300-400psi guage. I figured it was the check valve and went ahead and swapped it out, easy 10 minute job. Fired it up and still same thing. I guess I'll be tearing mine apart soon to see what is wrong with it.

I used the recommended 46 hydraulic oil and have changed it twice already. Oil is crystal clear right now. I took a pick of the check valves for reference...

used on the left, new on the right...a little bulging on the old one

where the check valve sits...

removed metal pipe for easy access...

Gertrude · « **Reply #56 on:** May 30, 2018, 02:28:06 AM »

I have the same compressor and it failed within 2 hours of run time. Filled my buddy bottle 3 times and my 88 cu ft bottle from 1700 to 4500 once. Compressor now will not get over 500-600 psi.
My secondary piston seal looks the same as the OP's with the black residue on the piston shaft.
I have not looked at the check valves yet.
Great info shared here. Thanks !
Subscribed.

Tweeter · « **Reply #57 on:** May 30, 2018, 04:48:17 AM »

Sounds like a pattern is starting to emerge with our vevor compressors

MJP · « **Reply #58 on:** May 30, 2018, 05:08:07 AM »

Check the second stage valve as well, there is two valves. The one leaving the second stage head is probably gummed up has heat damage / carbon.
I wont say anything about oil because what do I know, and people don't seem to care.

Marko

WiseGuy · « **Reply #59 on:** May 30, 2018, 10:59:59 AM »

Quote from: MJP on May 30, 2018, 05:08:07 AM

Check the second stage valve as well, there is two valves. The one leaving the second stage head is probably gummed up has heat damage / carbon.
I wont say anything about oil because what do I know, and people don't seem to care.

Marko

Marko,

Thanks for that suggestion! I will check that tonight and report back as soon as I can.

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Vevor compressor failed

Author Topic: Vevor compressor failed (Read 24224 times))