If you intend to replace the igniter electrode ( part no. PS436633), purchase a minimum of twelve (12) top burner mounting screws ( part no. PS437925).
I also recommend that you replace all the electrodes since you have gone to the lengths described below to replace one igniter electrode.
After time, the heads of the mounting screws become brittle and break off when attempting to remove them with a 3/16" socket or nut driver.
Be aware that even the new screws are not exactly 3/16 hex, nor do they truly accept a 4.5 mm, or 5 mm socket. The 5 mm has to much slop, and the 4.5 mm, and 3/16" do not fully seat over the head.
First unplug the stove, and turn off the gas.
To remove the broken screws, I had to use a hand grinder to grind the heads off (you could be as careful as possible, but you will still damage the porcelain finish of the range top.) Unfortunately every screw has to be removed to lift the range top up enough to gain access to the electrode(s).
Along with the broken screws being in the burner casting, to replace the electrode, you have to remove the burner to work on it. Remove the insulated wire from the electrode, and then the gas line to the burner.
I recommend inspection of the insulated wires to see if they may be grounding out to the stove body. With the top removed and the burners still in place, plug the range back in. Turn any knob on (all electrodes should spark at the burner accept the bad one(s)). Observe the wires to see if there is sparking to the stove body. If there is none, continue to replacement instructions. If a wire is sparking to the body, wrap the damaged wire with HEAT RESISTANT tape. Standard vinyl electrical tape won't withstand the heat.
To remove the burner from the gas line, use a 1/2" open end wrench (preferably a tubing nut wrench) to remove the gas line along with an adjustable wrench to hold the burner to prevent damaging the gas line.
If your lucky, the cross point (Phillips head) screw that secures the electrode will remove without stripping, but don't count on it. I had to grind those screw heads off as well.
I used a size no. 30 cobalt drill in my drill press to attempt to remove the broken off screws, but because of the screw/drill size, I could not keep the bit on the hardened screw center, it kept walking off center. I ground the screws flush to the burner surface, used a center point drill, a center punch, and a spring loaded set point punch, nothing worked to keep the bit from wandering off center and into the soft metal casting.
I had to drill new holes with the no. 30 drill bit just to the right (or left) of the existing holes. Keep the same orientation and mounting distance when drilling, either to the right or to the left.
The new burner mounting screws did not work for mounting the electrode to the burning, I used small no. 6 self tapping screws to mount the new electrodes to the burner casting (the washer head was to large).
Reconnect the gas line(s) to the burner(s). It will be necessary to carefully bend the gas lines so as to line the new holes up with the top when remounting the burner(s).
If I had it to do over again, I would just donate the range as is, while explaining the problem to the donation center. After my experience, I personally don't think it is worth the trouble of replacing the electrodes on a range this old.
Hope this helps.
