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Use of Loctite on Toyotomi products

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  • Use of Loctite on Toyotomi products

    Use of Loctite on Toyotomi products

    Toyotomi OM 122DH and OM128HH products use Loctite on several fittings during assembly. The nuts that hold the burner to the heat exchanger and the screw that holds the electrode elements to their bracket are two examples of this use.

    The problem comes during service when it is necessary to remove these fasteners. The nuts that hold the burner to the heat exchanger now require a wrench or channel locks on a long screwdriver to get them off. The screw that holds the electrodes in place may require a vise and an impact screw driver to get it started.

    The nuts are not too much of an issue, but the screw is. It is a large Phillips pan head screw. Bigger than a number 2 bit. If you use a number 2 bit there is a chance you will strip the head out. Now that Toyotomi is using Locktite, it is even more important to use the correct size bit.



  • #2
    Thanks for pointing this out! It might be worth heating the area a bit with a heat gun to soften the Loctite before trying to loosen the screw. Just need to be careful not to damage any nearby parts. Really appreciate you sharing this!

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    • #3
      Good info, thanks for pointing that out!

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      • #4
        Seeing as how they're Japanese products, the "Philips" screws are probably JIS (Japanese Industrial Standard) screws. You can buy screwdrivers to match them that won't strip out the heads so easily

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        • #5
          My discussion with the Regional distributor was less than informative. They would not or could not tell me about the use of JIS screw heads. I did agree with adnadeau​ at first, that if it was produced in Japan it more than likely has a JIS screw head.

          A close inspection of the heads of cabinet screws shows rounded corners on the centers of the screws. This rounded portion is an indication of a Phillips head screw. I looked at all the different types of screws used on a Toyostove and found they all have the rounded corners, even the machine screws used in the fuel system.

          Having done this work for 25 years and used a #2 Phillips head screwdriver all this time, I was a bit miffed with the idea the Japanese have a different screwdriver bit design. It does stand to reason they would use their own style of bit for something manufactured in their country. The reality is, after a close look at the screws, it shows they use Phillips head screws. Now I wonder if this is for units destined for the US market?

          I will reprint this on a new post that will be dedicated to the screw head design.




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