Finally, after a week of re-restoring, I drove my '15 Light Canopy Express about 2 miles today. I meticulously went over anything that could go wrong and threw in a fire extinguisher for good measure. Hadn't driven it since the '82 combined MTFCA/MTFCI tour in Deadwood, SD. But, with 2 choke cranks, I turned on the ignition and heard the coils. The next crank made the engine roar into life. Adjusted the spark and gas and turned on the HOT magneto and took off. But I forgot the Muncie 3 speed/reverse shift pattern so I groped around for low gear to go down my rather long gravel drive and turn onto a caliche (gravel) county road. I left the hood off to watch things and, sure enough, the fan wasn't turning. Drove on anyway and, upon arriving back at the Conservatory, figured I only had to adjust the 9/16" bolt to tighten the belt. But I noticed the correctly crooked fan bracket appeared twisted so the fan pulley wasn't perfectly parallel with the crank pulley. No problem. Using the bench grinder I ground off the uneven rear-most face of the bracket where it attaches to the engine with the 3/4" bolt. But upon mounting the fan with a spacer washer in the rear, I tried to spin it with an index finger. It tightened up on the center fan pulley bolt. I should mention it has the correct grease cup nut on the rear hiding a zirc fitting and the fan is an early non brass hub unit. I'm easily able to loosen the upper fan bolt but, when spun, the bolt tightens onto the bracket. What am I missing?
Unless you do parades, the best place for the fan is on the wall.
. . . or, unless you live in south Texas and its summer. . . .which I do and it is . . .
The female threaded grease cup on the back of the fan acts as a lock nut.
: ^ )
Thanks Keith - It worked! I tightened the grease nut first and the upper fan bolt stayed put when I drove the T for the same 2 miles and the fan spun real good. Since I haven't driven the T for nearly 3 decades, and theres been a good bit of advice on the double front wishbone in the last year or so; can someone provide the name of that CA fellow who sells a cast brass attachment to utilize a later wishbone on a brass T?
Check out Bill's e-bay store. The brackets are at: http://www.ebay.com/itm/Model-T-Ford-front-dual-radius-rod-support-clamp-11-18-/ 161141375516#ht_623wt_849 and his main page is located at: http://stores.ebay.com/Antique-T-Motor-Sports-llc?_trksid=p2047675.l2563
Hap l9l5 cut off
George, as Keith mentioned, the greaser will act as a locknut, but it is not the final answer. The fan shaft is stepped to allow it to be threaded into the bracket and come up hard against the bracket. This will lock it to the bracket. When you wind the greaser on, you have a second lock.
If the fan locks up before the shaft is fully home, you have a problem with the bushings in the fan being too thick in the flange. They should be dressed down until you can wind the shaft fully home. I would not rely on the threaded pressed steel end of the greaser, often not that true, to be a primary locknut. If it comes loose, your unlocked shaft is free to migrate forward with possible disastrous results for your radiator.
Hope this may save some grief.
Allan from down under.
Thats it ! Much obliged to you Hap and to Allen for the advice too . . .I feel safer already
Actually Allan, if the greaser comes loose the bolt will tighten up and the fan will stop, as George has just experienced.
You are right James. Fan rotation and shaft rotation for tightening are the same. However, if the shaft is correctly fitted against the built in stop, it cannot migrate further and cause the fan to seize, as George experienced. Using the greaser as a locknut is not the answer.
Hope this helps.
Allan from down under.