Optimus 8R lost pressure

Discussion in 'Stove Forum' started by neale, May 30, 2018.

  1. neale

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    Hi there all, my problem has probably been dealt with numerous times so please forgive me. I got my 8R in 1986 and has now began to loose pressure and a small flame comes from the filler cap where the mini pump attaches, I have spent 3 days on the net and numerous OS calls to find solution, can anyone please help, cheers.:)
     
    neale, May 30, 2018
    #1
  2. hikerduane

    hikerduane Subscriber

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    Sounds like the pip in the SRV needs to be replaced or at least looked at. Some are like the NRV in bigger stoves and can be unscrewed from the lower part of the cap then the pip replaced. Pic might help.
    Duane
     
    hikerduane, May 30, 2018
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  3. neale

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    Thanks Duane, the pic shows a small blue flame coming from the cap, as I increase the pressure with the mini pump the flame gets bigger, naturally. Can you suggest where I may be able to obtain the pip I need? thanks. stove flame.JPG
     
    neale, May 30, 2018
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  4. threedots

    threedots Spain Subscriber

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    Hello @neale .
    You will need something like an 'Allen Key' but with a pentagon shape on the end instead of the hexagonal shape the 'Allan Key' has, to disassemble the Tank lid to get at the pip. While you are doing that, you best replace the rubber seal under the tank lid at the same time.
    Parts are available from 'The Fettle Box' which appears on the right hand side of this page.

    I have found that you are in Australia and there may be an Australian member who might be able to help you out including getting the correct parts for you.
    Cheers, John NZ
     
    threedots, May 30, 2018
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  5. hikerduane

    hikerduane Subscriber

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    Was thinking after my reply, the SRV in your cap is like a normal NRV since the cap is designed for the external pump. Grip the cap and unscrew the lower part that extends into the tank with pliers, the pip will be in the lower part, on top of a spring. May scar the lower part if it is stuck good. There are two sizes of pips.
    Duane
     
    hikerduane, May 30, 2018
    #5
  6. CW

    CW United States Subscriber

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    CW, May 30, 2018
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  7. Tony Press

    Tony Press Australia Subscriber

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    @neale

    Where do you live in Australia?

    I’ve got the right tool to take that cap apart and would be happy to fix this for you, but I won’t be back in Oz for three weeks.

    Contact me through “Conversations” if you want to chat privately.

    Cheers

    Tony
     
    Tony Press, May 30, 2018
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  8. neale

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    Thanks CW, that really helped, cheers, Neale.
     
    neale, May 30, 2018
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  9. snwcmpr

    snwcmpr SotM Winner Subscriber

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    If grabbing with pliers, and you wish to preserve the appearance, wrap the item with some leather.
    Or hold in a drill chuck.
     
    snwcmpr, May 30, 2018
    #9