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Motion Sensor Light Bulb

  • 06-07-2016 2:48pm
    #1
    leeside11
    Registered Users, Registered Users 2 Posts: 151 ✭✭


    Tried to open the Floodlight there to replace bulb but the screw is as tight as anything won't budge and I'm afraid of damaging the screw head. It's a cross screw.
    Sprayed it with WD40 but no joy.
    Any tips on dealing with this would be great..


Comments

  • #2
    CJhaughey
    Registered Users, Registered Users 2 Posts: 14,907 ✭✭✭✭CJhaughey


    Alloy body + steel screw = galvanic reaction.
    In short the steel welds itself to the alloy, you probably won't move the screw without stripping the head which is probably very soft steel.
    Get a sharp drill and drill the head off the screw, the bulb can be replaced and try using a pair of vice grips on the stub sticking out of the housing.
    if you can't turn it then you need to drill the screw out, centrepunch the exact centre of the screw and drill it out with a drill bit smaller than the diameter of the screw. The remaining threads can be picked out and a new screw used.
    When you fit the new one make sure its coppergreased or some similar kind of anti seize is used.


  • #3
    Gen.Zhukov
    Registered Users, Registered Users 2 Posts: 2,090 ✭✭✭Gen.Zhukov


    CJ's assessment is bang on. Depends on the type of screw head. If counter sunk then it's harder. If a pan/round/raised head then try gripping the head with a vise-grip/pliers and turn.

    Other tips are heating (this could brake the glass though)
    Tapping the handle of s/driver, while it's in the screw head, with a hammer.

    *All of this would be tricky and dangerous if up a ladder*


  • #4
    leeside11
    Registered Users, Registered Users 2 Posts: 151 ✭✭leeside11


    1.618 wrote: »
    CJ's assessment is bang on. Depends on the type of screw head. If counter sunk then it's harder. If a pan/round/raised head then try gripping the head with a vise-grip/pliers and turn.

    Other tips are heating (this could brake the glass though)
    Tapping the handle of s/driver, while it's in the screw head, with a hammer.

    *All of this would be tricky and dangerous if up a ladder*

    Neighbor managed to get it out with a drill after. He checked the bulb which turned out to be fine, he reckons it was the sensor acting up. All working again.


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