Air shift switch fittings

[davemccoull]

Having got my air shift transfer case fitted, I came to couple the flexible air feed to the backof the switch, and noticed the fitting in the switch is 1/8 B.S.P. taper with a flat end. On the flexi tube there's a swivel nut 1/8 B.S.P. with a female cone seat. I don't see how this can seal, looks to me like there should be male cone on switch fitting. The fittings on the air pressure gauge are just the same. (the fittings don't seem to be leaking, I've yet to test with soapy water)
Would appreciate your views,

 

[jwaller]

I noticed the same thing when my air pressure gauge started to leak like crazy. I called saturn and they didnt know and I just kept moving the fitting around and tightening it in different places and it finally stopped leaking. the nut gets tight but the line is almost always loose.

 

[rizzo]

I have been using the new plastic air line that the semi's use now. I haved to buy new fittings, so I just replace the whole line.

 

[gringeltaube]

Yes Dave, that’s the way it comes from factory. Strange engineering, isn’t it!?
It feels like there could be some kind of O-ring or gasket between nut and flared end of flex line. That might get old and tend to leak air after just… 30, 40, may be 50 years?
I would get (or fabricate) the correct fitting: one end 1/8 BSP, flat, the other one same tread on 10mm o.d., 17mm long, male cone at the end.
Try if it leaks, first!

 

[davemccoull]

air shift fittings

Thanks guys, it does look like a seal between nut and flared end of tube, and the tube is always loose, the seal looks perished on mine, so i,m going to turn a fitting with a cone on the end, which will cure problem.
Thanks for all your help.

 

[ida34]

I would not think that too much air would be lost by having a little leak here. As long as the air demand of the leak does not out pace the air supply of the compressor then everything should be OK. I wouldn't even fix a really small leak. If you have to check the connection with soapy water to see it leaking it probably will not be a problem. It is not like we are working with a flammable or oxygen displacing gas here. That being said if I was replacing the switch I would modify as needed to get a good seal. I would not just do it to fix a small leak though.

 

[davemccoull]

air shift switch

Remember the old saying "A stich in time saves nine".

 

[eddiec]

i would have to agree with ida on this also. if our brakes were air actuated, then yes, i would worry about every leak. but since our air system is actually only used for the horn, t case, and brake booster, i wouldn't really sweat it.