I have a 25 TT. I am preparing for my new radiator to arrive from Brassworks next week. While I have all that space open I thought I would take off the headlights to sandblast and paint the buckets. My question is, are these stems tapered or straight? I found this thread from 2013: http://www.mtfca.com/discus/messages/331880/375833.html and it shows them made both ways. I have not been able to get them broke loose. I have been soaking them with PB Blaster, the only penetrant I happened to have right now. This evening I tried some heat, but did not get them red not. There is not much room under them to get a swing with the hammer.
Just a note about the radiator. I really wanted a Bergs, but when I called them last week, the gentleman told me they were shut down for a month, that I should call back at the end of October. I didn't want to wait two months. Business must be good. I'm happy for them.
For the '25 you would have the front fender supports/ headlamp brackets with the 'wedge' shape opening in the headlamp post bracket.
'21-'25 fender support w/ hole for headlamp post.
The headlamp post would have a round post, with a wedge shape top to fit to these fender supports.
'20-'15 headlamps have 2-sided 'flats' on the round post that fit only into the '20 and earlier fender supports.
'15-'20 headlamp post design
The stem part is straight on both models - you'll have to get it loose enough to be able to turn and pull the headlights - maybe more heat will help breaking the rust?
I have been collecting T parts since committing myself to ownership. One such part was a headlight bucket/stem with the square sides. One guy told me it was 1915-only. Is the above 15-20 quote correct ? Good intel.
Have fun, the more Ford T parts you gather, the more differences you will run across! But its all documented in the Parts books.
There are two different style 'headlamp post' holes in the front fender brackets.
Here is an earlier post, with lots of info including that;
4809 (Factory #343) This one is the early for magneto head lamps, note the single flat side on the post hole. This mates with the 'flat' side headlamp posts. Those head lamps were from 1919 to 1920. Designs varied. The 1920 being unique with 2 bulb sockets in the bucket, 2 bulbs, one for bright, and one for dim. Have a set of these dual lamp Ford buckets, they have the flat-sided mounting posts.
1920 dual lamp headlamps.
1920 and later fender iron bracket with 'wedge' shape head lamp post opening
4809 (Factory # 343B