Help! - Hymer 544 LPG tank

Discussion in 'Motorhome Chat' started by cmb, Jun 18, 2012.

  1. cmb

    cmb Read Only Funster

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    Hi all

    The first of many newbie posts no doubt.....thanks in advance for all your help! :)

    I purchased a 1992 Hymer 544 recently and have been checking out how everything works.

    For the gas supply, instead of small gas canisters stored in the outside compartments there is a large LPG tank which as been fitted underneath the chassis at the side. It's got a few taps on it but I'm not sure what they are all for.

    The red handle with the pair of arrows on it seems to control whether gas is released from the tank and I gather the valve is open when the arrows are parallel to the direction of gas flow. So the picture below depicts the valve in the open position.

    [​IMG]

    [​IMG]

    - What does the other red handle with AUF written on it do?
    - What is the silver disc with small red button on it for? and what does the button do?
    - There's also the black knob on the right hand side of the picture, what is this for?

    Also, can anyone shed any light on how I can tell how much gas is left in the tanks.

    Filling up? What's the correct procedure?

    Cheers all!
     
  2. TheBig1

    TheBig1 Funster Life Member

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    Auf == Off, so is the isolator
    silver disc is the pressure regulator to supply gas at a correct pressure
    red button it to clear airlocks in the regulator
    black knob is a hand wheel holding the cover on. unscrew to remove cover

    probably find a contents guage under the cover

    filling up...... dont until the tank has been checked to ensure that the rust hasnt compromised it

    when its passed testing, drive to a garage that sells autogas lpg... turn off the valve to isolate low pressure side. follow instructions on pump, as in push into fill connector, turn half turn. use locking device on hose then hold button in on pump till tank is either full or reached your limit. let go of the button and disconnect hose, but be prepared for a loud release of some gas. this is normal. when done turn isolator back on

    simple really
     
  3. Mr Colpot

    Mr Colpot Funster

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    Answers as above - might be worth checking that the filler connection is the correct type - undo the black knob, remove the plate and look for the brass connection - we used to have one on our first Hymer and the bayonet fixing was removable to replace with a european one.
    If I remember rightly the gauge was under the cover as well.
     
  4. cmb

    cmb Read Only Funster

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    Many thanks to you both for your informative replies. Very helpful.
    I'll take the metal plate of and check for a gauge.

    I guess best practice when driving is to turn the gas off. Where is this best done? Using the taps under the sink? The red tap on the tank or the red AUF tap on the tank?
     
  5. Mr Colpot

    Mr Colpot Funster

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    I always turned it off using the red lever when driving.
     
  6. simsy56

    simsy56 Funster

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    I think you will find that 'AUF' means 'OPEN'


    Craig
     
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  7. Mr Colpot

    Mr Colpot Funster

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    Well spotted - I think if I remember rightly it was Auf for On and Zu for Off.
     
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  8. bigfoot

    bigfoot Funster

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    I had the same fitting on my 544 the red lever is the isolation switch for the BBQ take off to the extreme left,the tank shut off is under the over retained by the black knob,mine was a brass turn wheel. Everything else is correct but do check the tank
    As for the filling point,mine needed an adapter in the uk,Calor depots had them and they only charged 5% vat when filling.
    The best thing fitted,I filled up whenever I could an no heaving bottles around.
     
    Last edited: Jun 19, 2012
  9. cmb

    cmb Read Only Funster

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    Thanks for all the replies.

    Took the grey cover off and as advised, there's a shut off valve and filling valve under there together with a meter indicating how full the tank is in %.

    [​IMG]

    So when I'm on the move and need to turn the gas off should I use the small red handle on the left with the arrows or the brass tap under the metal cover?
     
  10. aba

    aba

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    personally i would use the brass tap.
     
  11. bigfoot

    bigfoot Funster

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    The red lever is only for the BBQ take of to the left as you look at it.
     
  12. aba

    aba

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  13. JockandRita

    JockandRita Funster Life Member

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    Going on the images provided, it looks as if the BBQ take off point "may" also be used to connect an external cylinder using it's own regulator, ie, like an "extend a stay" set up, but only after the main tank and regulator have been isolated, using the toggle valve and tank isolation valve.

    A similar set up was already installed on our MH.

    Regards,

    Jock.
     
  14. cmb

    cmb Read Only Funster

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    Thanks for all the replies!

    Went out this weekend and have been using the brass knob to shut off when moving.

    I also managed to fill up and found the previous owner had left one of the adapters aba suggested in the storage drawers underneath. The tank was 20% full and I got 80% LPG for £30. Bargain.

    Wild camping this weekend so I'll see how far the gas actually goes.

    Cheers
     
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