Removing/replacing 8N front wheel hub bolts

CFB

Member
Hello,
I'm ordering other parts so thought I'd get these at the same time. I'm missing one complete bolt and nut from one front wheel hub and a second one broke or twisted off when someone took off the nut.
I tried pounding out the broken bolt, but did not pound too hard. It looks like a separate bolt per the parts diagram, rather than welded on the hub, as it does have a part number. I presume the bolts are like carriage bolts - I could not tell from the parts diagram and it was not stated.

So any tips on getting that broken bolt out?

Also, as I did not jack it up yet, will the wheel just slide off the bolts once I remove all nuts?

thank you
 
The bolts are knurled and pressed in place.

If you have access to an air hammer, that will usually make pretty quick work of the job.
 
okay, thanks guys. So will I be able to press it in with hammer blows the same way now I hope to remove the broken bolt?

I do not have access to an air hammer.

thanks again
 
CFB,Just knock the bad ones out with a Big fn Hammer and a drift then just put the new one in the hole put the nut on and tighten it up tap it with a hammer to seat it in if needed. Also a few drops of oil on the new one will help also.
 
(quoted from post at 13:08:53 09/16/18) CFB,Just knock the bad ones out with a Big fn Hammer and a drift then just put the new one in the hole put the nut on and tighten it up tap it with a hammer to seat it in if needed. Also a few drops of oil on the new one will help also.

thank you all for the advice and quick responses. Much appreciated.

and I learned a new word, knurled. I've seen, maybe even used, but did not know what they were called.
 
CFB,The bolt actually is a (serrated) wheel stud and not knurled.Knurling is done on a lathe using a knurling tool to put //////// angled notches on the work piece to increase the outside diameter of the piece.Where serrated llllll straight notches are usually made on a bolt shank for a pressed in fit to hold the bolt tight and keep it from turning.
11195329_dag_6105691_pri_larg.jpg

Bolt
 
Thanks Den for the clarification. The picture was really helpful. thanks for taking the time! I'm pretty sure now that I have not seen/used one of these type bolts.
 
If the stud doesn't drive out fairly easily, I wouldn't wail on it.
Use an air impact as stated or take the hub off (one nut) and
put it in a press with good backing to press the stud out.
Beats bending/breaking the hub or turn stops.
The new stud will tighten in with the nut as Den mentioned.
Recheck the torque a few times for good measure.
 

Thank you Royse for this comment. I was actually thinking about this earlier if I could do some damage by pounding too hard.
 

Well, looks like I'm going to find someone to press then out for me. I had one bolt on each wheel that spun as I turned the nut. I had to split the nut to get it off and then thought it would be easy to pound out since the bolt spun, but nothing doing. I'm glad I tried every bolt.
 
[b:37705ccf35]This[/b:37705ccf35] YT thread may also help you out. Results are on the last page if on modern view.
 
oh wow! this is interesting! Maybe I'll need to do the same. I forgot to mention on the earlier post, that on one of the bolts, I could pound it out toward the back but it stopped at less than an 1/8" out, so I wonder if these are of the type mentioned in your link you sent me. thanks, by the way for that extra time for me. appreciate it. cfb
 
Hello again. Just finished tearing down my front wheel bearing. See update on that if interested.
So as I got closer, I see my studs all have a flat side to the head. Hope the picture shows that clearly enough. Mine, well the body (red) is all 8N and is 1949. My son has a '51 and he just emailed me his front wheel and they have a flat side too.
So I'm wondering if this flat side which gets put in against the ridge of the hub is to prevent it from spinning. You can see that my one in the 10 o'clock position has spun. I guess I'll find out when I get them out if they have that serrated portion to the stud or not. I looked up a 2N stud and it looks like this, but since my son has it too, maybe not.
thanks
mvphoto23975.jpg
 
"So I'm wondering if this flat side which gets put in against the ridge of the hub is to prevent it from spinning. "

YES, obviously.
 

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