Yong Heng second stage piston seals
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Yong Heng second stage piston seals
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Topic: Yong Heng second stage piston seals (Read 387 times))
Angus.25
Shooter
Posts: 5
yes
Real Name: J.T.
Yong Heng second stage piston seals
«
on:
August 18, 2021, 06:50:23 PM »
I was searching through some old posts on the Subject posted above and found this from 2018.
"The seals are a non split type, but there is no need to do the above process,
that is because the second stage seal head screws off to replace the seals.
I suspect this might be the cause of a failure in some pumps as the seal head comes loose and screws out hitting the head."
I did some looking on Aliexpress and found this on "White-whale Mechanical store"
SORRY, THIS FORUM WILL NOT ALLOW ME TO POST PHOTO OR LINK.
but, it looks like the top of the brass piston with 2 seals attached with male threads to connect to the rest of the piston, with the 3 seal included. search for the seller and Yong Heng parts , maybe you can find the part.
My Question is: Has anybody found the second stage piston top unscrews and has anyone changed the seals this way?
The only mention I saw of changing the seals says they heated up the seals in hot water and pushed them over the piston rod.
I have no need of seal replacement at this time but was just researching the subject. I know there are replacement seals in my spare parts kit. I have also seen where some folks have ordered the spare piston with the rings installed.
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US, Ca, Hayward
Angus.25
Shooter
Posts: 5
yes
Real Name: J.T.
Re: Yong Heng second stage piston seals
«
Reply #1 on:
August 18, 2021, 06:51:39 PM »
well, I guess it allowed the pic anyway.
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US, Ca, Hayward
Blacktalon6
Expert
Posts: 1163
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Real Name: Ed
Re: Yong Heng second stage piston seals
«
Reply #2 on:
August 18, 2021, 10:13:04 PM »
Well I had mine for three years now and have not had to open her up yet
Guess I am lucky.
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CT
RWS 34 .22
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USAFANG6799
"Keep your air dry"
GTA Senior Contributor
Posts: 2560
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Real Name: Matt
Re: Yong Heng second stage piston seals
«
Reply #3 on:
August 27, 2021, 01:22:27 PM »
JT - I've had the 'Top-Hat' screw(second stage piston) break off of mine which warranted my replacing the top head assembly.
I'm in the process of rebuilding my YH after 3 years of basically trouble free operation. The head gasket
on the High Pressure piston split so I figured I'd go through it and do a rebuild.
I did try to replace the second stage piston seals but was unsuccessful due to not being able to unscrew the 'Top-Hat' screw.
So I replace the complete second stage brass rod which had the rings installed. I also had to replace the gasket
on the oil cover. Could not get it to reseal.
Still waiting for some other parts because .......well long story but suffice to say the YH is hinting it doesn't want to be in service
any more after 4 years. We'll see who has the last word
Yes I understand putting the piston ring seals in hot water is supposed to work. Might have a change to try it in 3 years
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Yong Heng second stage piston seals