I have a notion what to do about this, but I'll show the problem here in case somebody has a better idea. With the correct length fan belt on my 1915 roadster, the fan is low enough to just tick the crank ratchet and the nearest hose clamp. I thought the solution might be the next size longer belt, but it's way too long. What would you do?
Steve, is your fan bracket the right one for the 15? the one with a kick in it.
Yes, it is. Part #3967. Eventually the new belt will probably stretch a little and I can raise the fan a hair to eliminate the contact.
If you're using leather, soak it in warm water for a few minutes and stretch it a little in place over night. Then rub it down with Neatsfoot oil to take the radius sets out of it. Just don't soak it with oil.
Steve - Years ago, I needed a belt of a slightly different length than available at any vendors so, with the help of a local shoemaker, I made one.
A military web belt worked just great! Had it sewn together by the local shoemaker according to a string "pattern" that I had made, and smeared clear silicone rubber into the rough texture of the web belt for some "grip" and it worked great for several years. The trick is to make sure the sewn "overlap joint" runs "OFF" of the pulleys, not the other direction and altho' this was supposed to be a "temporary fix", it worked so well that I just left it for several years! FWIW,....harold
P.S. I realize that there are few shoemakers left, but there are still some commercial sewing machines around for canvas work, leather work, etc.
Just remove the fan and the fan belt. Problem solved.
And stay out of parades.
If you purchase a fan belt from one of the vendors, it should fit correctly off the shelf.
Crankshaft fan pulley
I suspect you have a later, larger crankshaft fan pulley.
I have two "Stock" Model Ts and had to go back about 3 times each to get belts that fit. Leather ones are all different... I finally gave up and went to the rubber belts and they do fit.
Your results may vary
Did the T have different fan sizes, diameter wise ??
Yes, I believe three (maybe four - water pump models) different ones - now I'll go measure - I have three out of four !
Early riveted fan - 13" across, replacement pressed steel fan - 14" and the '26-'27 style pressed steel fan is right about 13 & 3/4".
I ordered two 27" fan belts from one of our vendors for my '17 touring. Both marked 27" on the belts when I received them, the black rubber one fit perfectly, but the leather one (which I wanted to use) didn't come close to fitting over the pulleys!
When I finally measured it, it was only 25 3/4"! I soaked it in water, put it over my Model T jack and jacked it up until it stretched an inch longer. Put it on the pulleys, let it dry overnight, adjusted the tension and it's fine.
Was this leather belt just a mistake, or do they vary that much?
The correct belt length for a '17, if original fan drive pulley & fan pulley would be 25 & 7/8" in length.
Steve, If the belt is too wide, cut off a little on the edge with a razor knife. With crowned pulleys it will seek the middle. I know this from using hit and miss farm motors with flat belts and crowned pulleys. I hope this helps. Kevin in Utah.
OOPs! Steve ; my brain was disconnected from my fingers. I took some tin snips to the 20's blade I run on my 1916. works for me.
IIRC there were several sizes of crankshaft pulleys. Is the pulley on your car the right one?
Several suggestions would work. I could have had a special belt made at the saddle shop, but I didn't want to spend dough. I didn't want to cut any off the fan, though just a little would have done it. No, the crank pulley is the right one. The bigger one wouldn't fit into the 1915 pan.
With precision machining (running a 1/2" bit through a washer), I made a special accessory spacer.
Putting the spacer behind the bracket moved the fan forward 1/6", more than enough to eliminate the annoying tick, tick, tick.
Glad to see the fix was so simple, so will you be taking it out for a drive soon?
I found once that my crank bushing had slipped out a bit which allowed the ratchet to hit against the fan blades on my '12. Tapped the bushing in toward the motor so it had clearance between the blades and also the crankshaft pulley.
I see you have plenty of clearance between you ratchet and the crank pulley also.
It's hard to see because of the grease, but the bushing is flush in front. It occurs to me that I could probably have just bent the ticking blade forward 1/16" and saved the bother of making the spacer. Sometimes the obvious solutions are so simple we don't see them.
Had the same problem with my '15 touring. Finally went to NAPA and bought a 1" notched rubber belt to fit and turned it inside out. Worked perfect.