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Thread: CTIS schrader valve and kneeling valve assembly

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    Default CTIS schrader valve and kneeling valve assembly

    My left rear tire is leaking down slowly over 2 days or so. I initially found a leak where the kneeling valve meets the valve stem for the tire. After disassembly re-assembly there I found the kneeling valve to be leaking. Cycling the valve seemed to only make things worse. Tonight I took it apart and cleaned the valve and no more leaks detected with soapy water. I used some WD40 and a bottle brush to clean out what looked like dark brown dirt or something. In two days we will see if I still have a slow leak.

    Question:
    In the TM 9-2320-365-24P Figure 158 I see what looks like a schrader valve in the valve stem. I have not taken apart any more wheels. Is this part optional or just missing on my vehicle?
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    4 Star General Steel Soldiers Vendor Suprman's Avatar
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    If you put a schrader valve in the stem then air cant flow thru for the ctis. The inside of the stem is threaded to accept a schrader valve

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    Aernan (12-08-2017)

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    Sergeant Major FMTV Truck Sales's Avatar
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    Figure 158, parts 33, 34, 35 are available here.

    Suprman is correct, the schrader valve inside the stem must be removed if using CTIS.

    Not sure where you found your leak - the seal to the wheel is notorious for leaking.

    3334.jpg

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    Aernan (12-08-2017)

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    Quote Originally Posted by FMTV Truck Sales View Post
    Figure 158, parts 33, 34, 35 are available here.

    Suprman is correct, the schrader valve inside the stem must be removed if using CTIS.

    Not sure where you found your leak - the seal to the wheel is notorious for leaking.

    3334.jpg
    A "Schrader valve" is what you're calling the valve core (34 in the picture)?

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    Aernan (12-08-2017)

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    Yes. The valve core. I was guessing it was optional.

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    Does anyone have a example of the internals of the Kneeling valve? What is contained in the valve other then the two round brass fittings? is there a spring? does anyone have a example of this spring if there is one inside? My Kneeling valve is leaking and my tire goes flat every two days also. I want to ditch it but I would like to know where I can find a "L" fitting to replace it with. I live in a small town and no one has any idea where to find such of a animal.

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    4 Star General Steel Soldiers Vendor Suprman's Avatar
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    Eaton 673240

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    tennmogger (03-10-2018)

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    Thank you for the quick response, yet after putting the "Eaton 673240" into google it came up with a right dif part. Could you point to a website or a place to purchase this item. Thank you in advance.
    Genuine Eaton Right Angle Conn. P/N: 673240 Differential Parts

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    4 Star General Steel Soldiers Vendor Suprman's Avatar
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    I have seen them for sale online. No one retailer I can recommend over another though. It is a public available part. Used on the rear wheels where there is no kneeling valve. I hate those kneeling valves. Nothing but trouble. Maybe you can fill the release screw mech with rtv and once it gets tacky then lock it down. Would have to be done off the truck though.

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    I have two of them and only when it got cold did the front one go bad. Was thinking about filling it with liquid rubber and putting the cap (release valve) back on. The problem I have come across is I am not sure how it all fits together (how it works) with a diagram. I was hoping someone would have pictures of the inner working of the device so I can get a idea of what I need. I went to Fastenal to find a solid cap and they tried to look up the part number with nothing found. They told me to go to CASE and they to could not help me.

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