rear hub wont go back on

K

KEN2939

Junior Member
what am I missing, rear hub almost goes on,then like it hits something, bottoms out? wont go all the way on. thanks for the help on the park brake spring, got it on using a hanger wire.
 
Here's a picture of the rear brakes. Can you see where anything hits the drum?
 

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I have been away from the Model A mechanics for a while, but at one time the linings on the parking brakes were a little too thick for the drum so slide over.
 
Ed said:
I have been away from the Model A mechanics for a while, but at one time the linings on the parking brakes were a little too thick for the drum so slide over.
Click to expand...

Yes, on the 1930 AA I worked on I had to sand the parking brake linings thinner so the drums would slip on.
 
I couldn't get one of my rear drums to go on because the park brake band wasn't centered. I replaced the backing plate with a new one from Bratton's and had to get creative to get it centered.
 
agree with all above.. and suggest you do a prelim attempt it without the key in to aid diagnosis to the obstruction being either key or brakes
 
I had a similar problem recently. Redid the brakes. Everything new or rebuilt. On rear, two new hubs, new drums, rebuilt backing plates etc. Hubs were bought 4 months apart. When I went to reassemble, one hub slid on easily. The other would not go on. It started to slide on and then would stop, but would rotate. I checked everything. Tried reversing the hubs (even though they were not arced to the shoes) just to see where the problem was. Sure enough, the hub that slid on easily slid on on either side. The one that would not go on would not go on either side. I completely removed everything except the backing plate and axle. Same result. I measured the hub race - right on spec for a new one. I measured the axle race, a little wear but still within tolerance. I checked the bearing - meets spec. Called Bratton's, they shipped a new drum and hub that they verified would mount correctly. (Love their customer service!). The new hub would not go on either. The same exact problem.
Now the hub would start to slip on the axle (no axle key by the way), and then appear to bind as the bearing starts onto the race. Yet the bearing fits beautifully on the axle and spins freely, and fits beautifully inside the hub and spins freely. But when mounting, it binds. If you force it a bit (with a big hammer), you can see where the rollers are leaving a slight score line on the axle race.
Yet everything measures correctly - or at least as close as I can tell. I finally borrowed a stock of rear bearings from the local supplier and checked them one by one. Five bearings would not work. With the 6th bearing, the hub slid on wonderfully. I removed the bearing to measure it to see how it is different than the others. I cannot find any difference in size. Anyway, I surrendered! At least the car went back together correctly and without force, but I still wonder why it would not work with 5 different rear bearings ( a mix of old and new but all serviceable.)
Good Luck on figuring it out.
 
Ahirt, I don't care for the new bearings compared to my old ones that had the grooves that ran in opposite direction from the roller next to each other. And I thought my old ones had at least one more roller compared to the new, but I can't remember other than there was a space between the rollers on the new and not assembled the same comparing them. Maybe the new are proven to be better, can't say for sure. Measuring each of the rollers with a micrometer might have told you why the others would not fit.
 
I am thinking that my problem had to be something was off by a few thousandths. But nothing that I could determine.
 
I replaced all the e-brake parts on one side because they were missing. The drum would not go back on. Problem was the drum was never cut for the e-brake lining. I have no idea what this drum was supposed to fit.
 
I'm got the left side on ok, the right rear did not have a e-brake. I installed a new e-brake from snyders. right side still hangs up with or without key.
 
Sand ebrake down. I put all new pads all around on my project and old or new hubs would not go on. I have some tight brakes now!
 
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