Monarch Ser.60 Gearbox Removal Illustrated - Page 2
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  1. #21
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    Quote Originally Posted by nt1953 View Post
    Michael
    I am doing some similar work on my gearbox and would like to know what you did to fix the counter bored holes that broke out on the bottom cover.
    I was getting ready for anything from making a new plate, to plugging/welding and re-drilling the holes. But then I realized that the existing counter bore diameters were still significantly smaller than the width of the block (a.k.a. Cam Plate (K21, p.22)) held by those screws. So I re-drilled the holes to the counter bore diameter, made new larger counter bores and used pan head bolts with wide heads. Liquid gasket applied between the block and the cover provided excellent seal (I even added more underneath the bolt heads which wasn't really necessary).

    The liquid gasket I used was Permatex 82180 Ultra Black Maximum Oil Resistance Gasket Maker.
    Last edited by MichaelP; 10-09-2019 at 01:50 AM.

  2. #22
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    I am going to try using hex drive flat head screws and counter sinking the cover to fit. My block is fitted with c-bores for o-rings, so leaking is not likely but I may put some silicone on the surfaces anyway.

    I am doing a little more than you did, so I will add a few posts to this thread for those that follow.

    This thread has been very helpful to me, so thank you for it.

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  4. #23
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    Thanks for the useful info in this thread... I pulled the gearbox off my 60 this weekend to fix up a few leaks before painting.

    img_2017.jpg

  5. #24
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    Here's the box off. Why is inserting images so quirky, BTW?

    img_2018.jpg
    img_2019.jpg

  6. #25
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    I found that the threads for a number of the flat head screws on the bottom cover plate went all the way through. I added marine bedding compound (linseed oil and chalk, basically) to the holes and screws as a quick fix. Left them for a few days to verify no more leaks. Wasn't too interested in pulling the cover and messing with a new gasket and or silicone. I'll add some more pics if I can figure out this TERRIBLE image attachment scheme.

  7. #26
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    I think the files have to have a ".jpeg" suffix to display full size.

  8. #27
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    Quote Originally Posted by Briney Eye View Post
    I think the files have to have a ".jpeg" suffix to display full size.

    No, it's the opposite. You need to change the ".jpeg" extension to ".jpg" to get the images to post at a decent size. For reasons known only to the Forum Gods, files with a ".jpeg" extension get resized to a smaller size. I've tried to get admin to fix this, but nothing so far.

    Cal


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