Can not remove fork from Hoda Express By sofasurfer (Read 603 times)

[sofasurfer]

I removed the handlebar but that is as far as it goes. I can not turn the big nut, that holds the fork on, more than a turn. After that it locks up. I used a pipe wrench and it will not move. It sure does not seem like a bad thread issue. It seems like some kind of a lock mechanism. Any idea why I can not remove the nut?

[Cruiser]

Welcome to Scooter Doc, sofasurfer. Are you securing the bearing race from turning while trying to loosen the flat nut? If they are locked together, you won't get too far before everything stops turning.

[sofasurfer]

Here is a link to an exploded view... www.cheapcycleparts.com/model_years/170-honda-1982-express-nc50/assemblies/3340
Not sure I understand. When the fork is inserted into the frame, the parts numbered 3, 14 and 11 are placed on the fork. Then the nut (#5) is installed on top of the bearing assembly, thus fastening the fork into the frame. I do not understand your statement about the race and the nut being locked together. And even if the race and the nut are locked together, wouldn't the race simply turn with the nut and still allow the nut to come off? I have never had this opened up before, but from my memories of working on my bicycles (many moons ago) the nut simply threads down onto the fork until it applies enoungh pressure on the bearings to prohibit slop. Sooooo, why won't that nut turn?
Sorry for making a likely simple thing into a rocket science project :-)

[kz1000st]

Every fork assembly in the universe has two nuts on top. A nut and lock nut. Even the picture you've shown from CCP shows that. If there wasn't a lock nut there wouldn't be anything to hold the whole assembly from loosening in time. Look again. Even bicycles have a lock nut system and I still work on those.

[Cruiser]

Jun 23, 2011 1:15:43 GMT -6 sofasurfer said:

Here is a link to an exploded view... www.cheapcycleparts.com/model_years/170-honda-1982-express-nc50/assemblies/3340
Not sure I understand. When the fork is inserted into the frame, the parts numbered 3, 14 and 11 are placed on the fork. Then the nut (#5) is installed on top of the bearing assembly, thus fastening the fork into the frame. I do not understand your statement about the race and the nut being locked together. And even if the race and the nut are locked together, wouldn't the race simply turn with the nut and still allow the nut to come off? I have never had this opened up before, but from my memories of working on my bicycles (many moons ago) the nut simply threads down onto the fork until it applies enoungh pressure on the bearings to prohibit slop. Sooooo, why won't that nut turn?
Sorry for making a likely simple thing into a rocket science project :-)

In this diagram, part number 11 is the bearing race which is threaded. Part number 5 is the lock nut. It's called a lock nut because of its function. Once the bearing race (11) is adjusted properly, you tighten the nut (5) down while holding the race from turning. This locks the two together. Because of slight differences in thread pitch between the two, they generally will not turn while they are locked together.

[beerstop]

I concur having been a former bicycle repair guy myself remove #5 then try to remove #11
if #5 does not move(be sure to hold #11 in place) then soak this assembly with some pb blaster as the lock nut or the race may be galled onto the fork threads which is common on bicycles too.
if #11 moves only a little bit then you will have to work it off by going back and forth with it using copious amounts of pb blaster.
doing a back and forth loosening then tightening process. you should get progress using this method