7140 tractor seat

[Dutrup]

Hello, The air spring (bag) under the seat of my 1987 model CIH 7140 tractor needs replaced. Does anyone know the brand and model of this seat? I can find no decals on it. Secondly do you know an aftermarket source for the air spring. The CNH units seem really expensive. Thanks

 

[crsutton81]

There are aftermarket sources for the whole seat and suspension but the names of the companies escape my memory at the moment. The last one I had that all it needed was the air bag I ordered it through my CNH dealer. He was able to get it and the switch for another one. New aftermarket seats complete with suspension last I checked were in the $ 1500 neighborhood.

 

[BarnyardEngineering]

You sure? I replaced the air bag in my seat thinking it was the problem. It still didn't hold air overnight. Then it stopped working which I thought was the switch. Turned out to be the wire to the switch had broken off. Still didn't hold air.

Ripped it out and installed a mechanical suspension. Much happier.

The seats are "Grammer" if I am not mistaken. High-end. I think the CIH prices may be cheap compared to factory.

 

[used red MN]

In the 1st link is the online parts catalog for your tractor. There are serial number breaks and seat styles that are different. Just as a guess I looked up the air spring in Chassis/Attachments the lower line the top is a dud. Then went to subsection 0-084. It shows the air spring as 67, which in PN 1981842C1 which updates to 197793A1. All these show prices of $170 - $190. There is a place in AZ showing one by using the updated number for $120, but that does not mean they will not charge you $80 shipping. Maybe you can find something in the 2nd link that will work, click on them to get dimensions. At least one other company came up when I searched ..universal seat air bags.. ha ha and the linked company just happens to use the name ..Universal..
CNHI 7140 online parts catalog

Another source

 

[Dutrup]

I added a check valve at the compressor and that slowed the leak dramatically. I just believe the air bag is old and porous. I see numerous bags online for about $60 but I cannot identify mine to take advantage of this. Thanks

 

[caterpillar guy]

There should be a number on the bag itself just use that or take the whole bag into a good truck parts house and they can match it up or find the number to match. The seats are a generic product air components are subject to the manufacturer of the bags. Use some soap and water mixed with a rag or swab ro find your leak it could be anything from the bag ro connections to a broken wire. If it has a leveling valve on the seat for the bag level it could also be that and I would suspect it first.