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Thread: 5HP18 ball (one-way check valve) diameter needed

  1. #1
    Join Date
    May 2004
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    Japan
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    Default 5HP18 ball (one-way check valve) diameter needed

    I hope someone can help, I need the ball diameter of ZF part number 1043 226 028 Valve, "D" CLUTCH ONE-WAY CHECK VALVE ASSEMBLY made of plastic, for that also a modified
    "Replacement" ALLUMINUM CHECK VALVE is available http://www.europeantransmission.com/...MWtechinfo.htm

    also in the parts catalog shown on page 27 of 42, Position # 51.200

    BMW ZF-5HP-18 "BIND-UP" WITH SELECTOR IN MANUAL "2" POSITION, 1st GEAR
    COMPLAINT: Before or after overhaul, vehicles equipped with ZF-5HP-18, may exhibit a "Bind-Up" condition in the Manual "2" position, 1st gear.
    CAUSE: The cause may be, the plastic "D" Clutch One-way Check Valve assembly located in the Lower Rear valve body, shown in Figure 2, may be broken allowing the "B" Clutch (Reverse Input Clutch) to be on while the "D" Clutch (Low/Reverse Clutch) is on in 1st gear.
    CORRECTION: Replace the "D" Clutch One-way Check Valve assembly , as shown in Figure 1, with a new assembly from ZF, or a new "Aluminum" check valve assembly offered by: Mario Aristides. Phone (305) 666-3544 or Fax (305) 666-8238.

    "Original" PLASTIC CHECK VALVE ZF Number 1043-226-028
    "Replacement" ALLUMINUM CHECK VALVE
    Last edited by shogun; 10-11-2022 at 07:57 AM.

  2. #2
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    Default

    whiskychaser measured it: quote
    4.56mm is as accurate as I can be. If I set my digital callipers at 4.6mm the ball slides through the jaws. The check valve isnt part of a kit so I would be tempted to get a new one from ZF, particularly as it is not the easiest thing in the world to remove.
    unquote

  3. #3
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    May 2004
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    updated links
    here a copy bulletin of that http://www.europeantransmission.com/....BMW/01-34.pdf
    from this main link http://www.europeantransmission.com/...MWtechinfo.htm
    https://www.transmissiondigest.com/november-2001-issue/
    Before or after overhaul, vehicles equipped with ZF-5HP-18 may exhibit a bind-up condition in the Manual 2 position, 1st gear.
    The cause may be that the plastic D-clutch one-way checkvalve assembly in the lower rear valve body (#15 in Figure 4) is broken, allowing the B clutch (reverse input clutch) to be on while the D clutch (low/reverse clutch) is on in 1st gear.
    Replace the D-clutch one-way check valve assembly (See Figure 5) with a new assembly from ZF, or a new aluminum checkvalve assembly offered by Mario Aristides (phone 305-666-3544 or fax 305-666-8238).

    https://aftermarket.zf.com/remotemed...fc-5hp19fl.pdf
    https://www.bmwe34.net/E34main/Troub...ch%20Guide.pdf
    Last edited by shogun; 10-11-2022 at 08:02 AM.

  4. #4
    Join Date
    Dec 2004
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    Sydney, Australia
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    4,374

    Default

    I'm looking into this kind of thing too. D clutches. One of the E46s began losing its reverse over the last week, an early one (2000 330i). Now it's gone altogether.

    First it was delaying engagement a second, then a couple.

    Then no reverse at all. You can feel some kind of connection straight after selecting reverse (1/2 sec) like normal, but the engine runs free like in neutral, no power transfers. This is bad, its the second one I have that needs fixing. The first is a 325 that blew the hydraulic pump's input shaft bushing, leaking fluid all over. I feel it will be all contaminated and need a complete rebuild so haven't touched it...

    Lots of work is coming up!

    Join the Aussie
    540i LE yahoo forum

    08/88 535i e34 M30+miller MAF, 'stiens, tints & teeth!

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