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Air Line Break, Driver’s Seat
Over a period of three years, I had three breaks in the 1/4 inch airline that goes to my driver’s seat. Two of them were down in the compartment below and the final one was under the seat itself.
After that break, about 18 months ago, I replaced the line from the source below to the break under the seat. In hindsight, I should have replaced the last few inches, but I could not see where it went. I put a compression coupling in the line between the new section and the old. The old section broke on our first long trip since the pandemic yesterday. Ugh
Evidently, it broke off at the point where it attaches to the seat. I say evidently because I can not see where it attaches. I have found the end of the hose, but no other hose and I can not see where it goes.
This is not super critical as far as stopping progress critical. I put vice grips on the hose and went on. I would like to get it going while we are in one place this week. Someone please educate me on where the hose attaches and how it attaches on and ISRI seat.
As you know, there is not much room for a big guy down there and I would like to know what I am looking for.
Davy
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16 Replies
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Davy, I’m going by memory and it is based on how Liberty mounted the pedestal and seat, but to get at my air lines I think I had to lift the seat off the pedestal.
I don’t care what size a person is that space has almost no room to work and I think the cabinet that is behind and wraps around the driver’s seat must not have been in place when the coach was originally assembled.
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Davie
Locate screws on the front of the seat base. Mine are hidden behind the skirt that is attached with velcro. Remove the screws and the seat base lifts off, exposing the frame and air fittings.
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is it an isri seat or recaro or something else ? if its the older isri seat – the airline coming in comes through the floor and its a 1/4in that comes to a isri tee. . however the plastic airlines are brittle that break off with age. the Tee then connects to two airlines which are 6mm (european airline size). One connects to the back for lumbar believe, and the other connects to the side. You can reach and service all three lines there if you lie on the side and kind of shift the rubber accordion boot.
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Thank you for the information, gentlemen.
It is and ISRI seat and the 1/4″ line goes to a tee. One side of the tee attaches to the seat somewhere but the second side of the tee is capped off. There is no lumbar support. I was wondering why the tee to a dead end.
Will the 1/4″ line attach to the seat or does it have to be changed to the 6mm you described?
How does the line attach? Compression fitting?
Davy
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Davy, If no lumbar, then hook direct to the height control/regulator. Just save the tee for later when you get the lumbar figured out. Should be a push fitting, if not, add one.
Good Luck
JimH
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Thank you, Jim.
Thankfully, we are back to work for one week so my time is limited. I hope to look it over today. Great information.
Davy
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you will almost certainly have to convert from the 1/4. ISRI is german and use metric air line fittings. One connector is to the side (right side toward passenger). That is the height etc. The one in the back (its kind of attached to the back rail of the platform, is the lumbar. If you have a capped line off the tee, then it probably attaches to there if the seat has lumbar support. if it doesn’t is just tapped to possibly accommodate one that does.
Dont try compress fitting a 1/4in line to a 6mm line. it wont work, at least not well for long.
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You will almost certainly have to convert from the 1/4. ISRI is german and use metric air line fittings. One connector is to the side (right side toward passenger). That is the height etc. The one in the back (its kind of attached to the back rail of the platform, is the lumbar. If you have a capped line off the tee, then it probably attaches to there if the seat has lumbar support. if it doesn’t is just tapped to possibly accommodate one that does.
Dont try compress fitting a 1/4in line to a 6mm line. it wont work, at least not well for long.
That is disappointing.
Here is what I found when I had a chance to look this afternoon.
This plastic/nylon nut above was screwed onto this fitting below. The small piece of broken hose was under the nut and on the fitting.
There is no way I could tell the difference between 1/4″ and 6mm with my eye and there are no markings on the hoses. This is the tee. The 1/4″ from down below is the right side of the tee and the top and left sides go to the fitting above and the dead end.
I can see no markings on the tee either.
You warned me not to try to connect the 1/4 to the fitting on the seat and I appreciate the caution. Of course, that does not mean I will not try it IF all else fails.
Any recommendations on a fitting to reduce to 6mm or where to find 6mm hose?
Davy
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6mm hose is easy. Grainger has it. they also have the 6mm to 1/4 adapter coupling as well. I believe you’ll have to get the T part from ISRI or europe (good luck). its easier to get a 6mm tee, and then adapt the 1/4 to 6mm (or vice versa).
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Thank you! I suppose I can reuse this tee IF I needed it, but one side was going to the dead end so I see no need for it.
Davy
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If you are in need of expert advise on ISRI Seating or need to buy parts….. here is the company in Washington State IRSI recommended to me. He sells the parts and knows IRSI seats. Just check his store front our and call.
Jason Willingham
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We also got parts and good information from Willingham Inc. We had the same problem, plus some others, of connecting the 1/4 inch line to the 6mm line. They sent us the proper connector with some other parts. Worked well for us.
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I’ve purchased parts from Darby Manufacturing
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I am in middle of nowhere mountains this week and I could find no 6mm air line or the reducer.
I decided to put the 1/4″ line on the fitting at the seat for a temporary fix.
I could barely get the 1/4″ line over the lip on the fitting. I can not imagine getting a smaller line on it. After I got the line all the way on, I tightened the nut and cranked the bus. The seat aired up and it is holding for the time being. I will keep a pair of Visegrips handy on Saturday.
I did leave a message on the Willingham website.
Thank you all.
Davy
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The temporary fix worked for now. I drove 600 miles Friday night and Saturday with no leaks. Yay!
Davy
1999 XLV X-6872, liberty #440
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