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by Jan Nelson
(Gig Harbor, WA, USA)
I am looking for any info related to a 1972 Jun-Air Model 6 and what is appropriate oil to use/where to get it.
Any other pointers to DIY support to maintain and/or rebuild are also greatly appreciated. The compressor is a USA model with a 15 liter tank under it and a .5HP motor.
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Oil for Jun Air Model 6
by: Bill
The specs call for SJ-27 synthetic compressor lubricating oil.
Complementary alternatives are available: SME 7050 Synthetic Compressor Oil SJ-27 Compatible 24oz
You can browse for the most competitive source for the lube oil.
Typically the model 6 also had a suffix, such as 6-4 or 6-15. Can you determine if your model has such?
Jun Air Model definition
by: Jan Nelson
The labels only show Model 6 without any -XX after. Since it is mated to a 15 liter tank, would that imply a 6-15?
The oil indicated on a label on the unit is SB-420IL. Is there a cross reference for this?
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Jun Air Oil
by: Bill
As noted earlier, the specs call for SJ-27 synthetic compressor lubricating oil. Since that is the recommended oil for Jun-Air compressors, by Jun Air, I can only assume it would suit your compressor.
An email to Jun-Air wouldn’t hurt, I would say.
Re: 6-XX, could be. There is no sign of just a Model 6 in today’s line up at Jun Air.
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Jun-Air Rep Replied
by: Jan
The regional rep. said that they only have the SJ-27 and did not know what the specs were for SB-42, the original oil spec back in 1972. Bambi still has an oil they call SB-42/46 available in the UK. I am going to try the SJ-27 and see if it works OK.
Jun-Air oil?
by: John C
Hi I have the same old unit (same gold/green colors). It’s in nice condition and I want to change the oil.
Did the SJ-27 oil work for you?
Hi
I just bought an old unit like this.
I need to change oil, and will go for the SJ-27.
But I also need to buy a new sight glass. Does anyone know which tread size i should get?
There is a lot of different sizes to choose from…
Great if anyone can help.
You could measure it.
You might get something if you search “jun-air model 6 sight glass”
Or you could order from jun-air supplier.
Hi Doug Thanks for your reply. Yes, I have measured it. I get 16,5mm on top of the treads. But, I am a bit uncertain what this give me in imperial. 3/8 is 16mm, so i guess this is the right one. But then there is different treads on 3/8-glass…. I prefer to get it right if someone knows, instead of taking chances. Of course i have googled this. How do you think I found my way here? 😉 Unfortunately there is next to no info to find about this old model. Therefore my question here… I have also been… Read more »
Well, they are made in Denmark, so it’ll be metric in all probability.
In standard sizes, 16.5 is maybe M16, and you measure threads peak to peak for pitch.
Or, take a look at this:
Oil level glass compl. [5410000]
-is that it? Maybe? I take it you’re in UK.
No, Im located in Sweden.
Hmm, I dont think its metric. I tried with a M16 bolt and the tread size is different.
Yes, I have seen that part also. However it does not look like that design. Not that it matters, I just want one that will fit. But mine have much more treads also…
And it does not say which size it is, and I think that there is different sizes on different Jun-Air compressors.
But, ill send them an mail. Maybe they know.
Thanks!
You may be right about the sizes being different. Anyway, good luck. Please to let us know if you find a source of info on these for future reference.
BTW, is yours cracked or leaking or what?
Na, The main issue is that it is foggy and discolored. I dont think it leaks.
The window seems to be some kind of layered plastic. And there is some cracks in one later or so… Byt dont think that is a problem.
I see clearly now…😂