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  • Same Blakeslee F-20…. New problem

     fixbear updated 4 months, 1 week ago 2 Members · 3 Posts
  • TorontoJoe

    Member
    May 15, 2021 at 9:39 pm

    Hey Gang

    @fixbear thank you for all the help with the oil. I finally found a good full synth #50 EP. I flushed and re-changed the oil. The machine runs like new!

    I have the unit largely broken down ready for blasting and refinishing. I'm down to the last four bolts that I need to remove. Here's the problem.

    The housing including the bowl lifter and strap locks are aluminum. The slot head bolts are steel. I've used penetrating oil and impact drivers. These bolts wont budge.

    I was thinking to use a drag link socket on a breaker bar but I'm afraid I might just shear the head off.

    I'm also being told I can heat it but I'm not sure weather to heat the nut or the aluminum housing.

    I also have no idea how much heat to add. I don't want to damage the housing. Replacement parts are not available.

    I'm thinking since this are steel bolts in an aluminum housing this is a case of galvanic corrosion but I can't find anything out there on how to free it up.

    I'm hoping someone might have some clever suggestion as to how to free up these bolts without destroying anything?

    Thanks guys

    mixer1 mixer2 four screws
  • fixbear

    Member
    May 16, 2021 at 11:26 am

    Get a hammer impact driver with a good bit made for it. The combination of downward force and twist helps to break it loose. The impact of the hammer also makes sure you are fully engaged with the slot. Applying a moderate amount of heat to the aluminum expands the aluminum. But start with heat at the screw to expand it first. I would apply Kroil oil for about a week before starting. It will take a long time for it to penetrate the threads and eat the corrosion. The hand held Impact driver can be found at most automotive tool supply's

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