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Old 01-29-2012, 08:53 PM
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Join Date: Oct 2007
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Quote:
Originally Posted by firemediceric View Post

To the point. Despite reading, over the last three days, EVERY one of the posts on this problem that I can find, I have not been able to remove the tumbler assembly. Some of the posts are contradictory, but that is attributable to different years and models. I have printed out the ones that I felt were most applicable. I have a ream of paper beside me in the car as I refer to different threads to try and solve the problem.

I am talking about a 1981 300 SD. 126 body style. My ignition has only one hole in which to stick a wire.

Some posts have said to put the key at the second postion. I feel this must be wrong, as the wire can barely be inserted at that spot.

Most posts have suggested having the key at the first postion. When I do this I am able to insert the wire about 1", not the 3" that some of the posts call for. I'm not sure if this is the right postion, as even a few degrees left or right of the first postion still allows the wire to be inserted. In fact, I can have the wire inserted about 1" and still turn the key a couple of degrees in either direction.

Some posts call for using the wire to apply pressure while pulling straight out on the key. Some call for the black collar to be unscrewed CCW while applying pressure with the wire. I'm not sure which task it is I should really be struggling to accomplish, so I have tried both, to no avail.

I have used different thicknesses of wire (all with bevels on to end) and I have toiled with them over several hours to the point that I have a blister on my thumb from exerting pressure on the wire.

Perhaps I am being over cautious in even undertaking this task, as the key has only bound up on me once and I was able to turn it again after a little jiggling and persistance. Since then I have only had to use the key a few times to start the car. I currently have the car parked with the key in the first postion, as I figured that if I put this repair off it will be a lot harder and costly at a much more inconveinent time.
I have tried to remove the tumbler from a switch I have as a spare, with the same results. I have both a tumbler unit out of the body so I can see where the wire tool (I am using an alen wrench) goes in, and can see the bar moving in that would allow the collar to turn.

However, when I try it on the complete switch, I can't get the collar to turn. I can tell I have it in the right spot because the tool goes in just a little further than even 2 degrees of rotation either way. I also can't turn the key with it like this.


I also have an '81 300SD that the ignition switch is stuck just between the position that the key is inserted, and the first position (ign on). The car is drivable (steering unlocked) by jumping the starter. However, there is no brake lights or glow system. I know I need to at least get it in the no. 1 position to remove the tumbler, but I wanted to practice first with the parts I have to make sure I can do it when I get the switch in the car in the right place. I am at my wits end! I have viewed all the photos on Diesel Giant, but still can't get it to work.. HELP PLEASE!!
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