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  1. #16
    Join Date
    Sep 2012
    Location
    North Yorkshire UK
    Posts
    3,179

    Default

    Hi Joe, Guys,
    Perhaps dipping it into a bucket of hydrochloric acid or some other strong acid might dissolve the corrosion and leave the two metals untouched?
    I think this is a bad Idea ! The hydrochloric acid will attack and damage both metals.
    Best Regards:
    Baron J.

  2. #17
    Join Date
    Jul 2006
    Location
    Athelstone, SA 5076
    Posts
    3,781

    Default

    I have oxy & acet. Can bring it up. wont take to long to try and see if works.

  3. #18
    Join Date
    Jun 2012
    Location
    SA
    Posts
    1,648

    Default

    Quote Originally Posted by eskimo View Post
    I have oxy & acet. Can bring it up. wont take to long to try and see if works.
    I would also go the heat route, but be VERY careful temp wise as brass will melt/deform easily.

    You can see where the brass has been spread though earlier pressing/hammering efforts, so it's basically made the situation worse.

    The end game will probably be to cut/drill one side and crack/spread it with a cold chisel. That will open the centre enough to remove the brass. Then it's a simple matter to grind and fillet weld the slot.

    Cheers Rob
    The worst that can happen is you will fail.
    But at least you tried.



  4. #19
    Join Date
    Aug 2008
    Location
    Adelaide
    Age
    64
    Posts
    1,173

    Default Success!

    Thanks to all for the suggestions, we attacked it with heat today and followed that up with "enthusiastic percussive maintenance" - i.e. a big hammer - and it finally came out after 50 or more years.

    This is the valve core and handle after separation and cleanup.
    Tender valve 3.jpg

    And this is the handle installed on the
    replacement valve.To get an idea of the sizes, the flange is 6" in diameter.
    Tender valve 4.jpg

    Interestingly, looking at mating surfaces there is no sign of corrosion - it's possible that the handle was heat shrunk onto the spindle, although why they would have done so is a mystery, especially as there's a ľ" retaining split pin.

    Thanks again for the suggestions, it reflects the value of these forums.

  5. #20
    Join Date
    Mar 2014
    Location
    South of Adelaide
    Posts
    640

    Default

    i would try some heat on the opposite side from the handle, use a 15 or 20 tip in the oxy, heat it up quick. It does look a little like the end of the shaft is peened, if heat doesn't work you may have to cut the handle off. if you are just trying to get the handle off to fit to another valve you may be better off just making a replica for the other valve. what is the valve off? my guess is something broad gauge SAR

  6. #21
    Join Date
    Aug 2008
    Location
    Adelaide
    Age
    64
    Posts
    1,173

    Default

    It's all good, the handle came off.

    Quote Originally Posted by snapatap View Post
    what is the valve off? my guess is something broad gauge SAR
    Spot on. Replacement tender for Rx class loco

  7. #22
    Join Date
    Oct 2010
    Location
    melbourne, laverton
    Posts
    1,771

    Default

    good one mate. what is the tank for?

  8. #23
    Join Date
    Aug 2008
    Location
    Adelaide
    Age
    64
    Posts
    1,173

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    Quote Originally Posted by azzrock View Post
    good one mate. what is the tank for?
    It's a replacement for a heritage loco tender.

  9. #24
    Join Date
    May 2011
    Location
    Murray Bridge S Aust.
    Age
    67
    Posts
    4,347

    Default

    And this is the handle installed on the
    replacement valve.To get an idea of the sizes, the flange is 6" in diameter.
    Tender valve 4.jpg
    Makes the 4" grinder look very small.
    Kryn
    To grow old is mandatory, growing up is optional.

  10. #25
    Join Date
    Oct 2010
    Location
    melbourne, laverton
    Posts
    1,771

    Default

    Quote Originally Posted by Gavin Newman View Post
    It's a replacement for a heritage loco tender.

    nice work what does a loco tender do? carry fuel or something?
    aaron

  11. #26
    Join Date
    Aug 2008
    Location
    Adelaide
    Age
    64
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    1,173

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    Quote Originally Posted by azzrock View Post
    nice work what does a loco tender do? carry fuel or something?
    aaron
    In this case, around 7 tons of coal and 3,500 gallons of water.

  12. #27
    Join Date
    Oct 2010
    Location
    melbourne, laverton
    Posts
    1,771

    Default

    Steam trains cool. did Steam trains ever use diesel like some steam ships?

  13. #28
    Join Date
    Dec 2005
    Location
    South Australia
    Posts
    990

    Default

    Quote Originally Posted by azzrock View Post
    Steam trains cool. did Steam trains ever use diesel like some steam ships?
    Wash your mouth out!

  14. #29
    Join Date
    Aug 2008
    Location
    Adelaide
    Age
    64
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    1,173

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    Quote Originally Posted by azzrock View Post
    Steam trains cool. did Steam trains ever use diesel like some steam ships?
    Some do burn heavy oil, not diesel, and a few burn wood but the bulk use coal. The Victorian Goldfields locos burn oil but all the SA preserved locos use coal.
    Some locos were converted back and forth between the 2 fuels in their day but that's a compromise as the fireboxes really need to be different to get the best from each type of fuel.

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