Yong heng owners-tell me your ways

[Mosin Marine]

How often are you guys changing out the oil?

[avator]

Well, I guess I'll take some abuse for this one....
I've changed my oil twice since I got it with 40WT motor oil.

[gendoc]

when i gave my YH to my son, it had 17.7hrs run time on it.
last week when i was at his cabinet shop, it has 24.8hrs run time.
3 years old, change oil at 5hr with the hyd iso 46/48 ? something like that...
i built a self contained cooling system for it, so adding cooling water was not needed.

only difference we do in the operation of these compressors is.
when the pressure gauge on the compressor reaches the psi intended for the fill,
we open bleed valve to unload head pressure before shutting down and continue to circulate coolant througout the closed loop cooling circuit.

we also opened the bleed valve when starting the compressor, but that dont seam as important as unloading the head pressure before shutting down.
YMMV

BTW, we only have filled guns with it and never any external tanks.

[Bladebum]

only difference we do in the operation of these compressors is.
when the pressure gauge on the compressor reaches the psi intended for the fill,
we open bleed valve to unload head pressure before shutting down

Mike, that was the advice I had been given. Except I'm filling a tank through the fill hose so the valve is wide open.  So opening the bleeder starts dumping air from the tank. Im thinking that closing the tank first and almost simultaneously opening the bleeder should do the same for relieving head pressure without losing tank pressure? Thanks for the info!

[gendoc]

you should install a check valve 

[KnifeMaker]

Well, I guess I'll take some abuse for this one....
I've changed my oil twice since I got it with 40WT motor oil.

Shame on you! 


Knife/Mike

[Bladebum]

you should install a check valve 

I think that is something I need to do!

[Dan H]

OK here is the thread with a ton of info on running the yong heng ... pay attention to the oil nuvair 751 this is the correct oil to run , we now have test that show no dieseling or detonation  in the upper cylinder with 751 where the other low pressure compressor, and motor oils fail causing damage to the compressor ... the old saying you can pay me now or pay me later really applies to the oil used ...


https://www.gatewaytoairguns.org/GTA/index.php?topic=172422.0


 

[Dan H]

Nuvair 751 oil link to buy ...

https://www.nuvair.com/nuvair-751.html

[joer]

I used a Yong Heng for about a year.  Here's how I ran mine based on what was posted in the various forums:
1. Royal Purple synthetic compressor oil.  I initially used the hydraulic oil and switched to synthetic compressor oil.  Some folks complained the hydraulic oil smelled bad.
2. Use a higher flow rate pump.  I picked one up off of Amazon.  It will aid in heat removal.  I only do 20 minute runs and resupply the reservoir with colder water.  Some use ice, but a water change accomplishes the same things. Stay below 50 C.
3. Use a good filter setup to eliminate water vapor.  I use a two stage filter setup using the Tux gold filters.  Stage one has a check valve and a tampon filter.  Stage 2 uses Tux's molecular sieve filter.
4. Pressurize the filter setup prior to starting the compressor using the air tank to be topped off.  The check valve will prevent air loss.
5. Start the compressor with both bleed valves open and open them again before shut down.

[Shaq]

I’m curious what the mfg thinks the max temp is, because it seems like a lot of conjecture here.