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The Plunger
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Joined: 09/03/2012
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Guys,

Continuing assembly on the R67/2 today, front wheel on! But wait, it's off center to the brake side by 1/2 inch, WTF!
Check list:
Brake hub up against fork and boss in fork bracket? Check(3/4's in anyway)
Axle all the way in? Check.
All snugged up? Check

At first I thought my fender was on crooked, nope. What the hell am I missing here?

  • off_center_1.jpg
  • off_center_2.jpg
  • off_center_3.jpg
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Brian
'52 R67/2

808Airhead
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Post more pictures of the hub

Post more pictures of the hub at the fork I want to see the length of the nub protruding from the brake plate. Is the wheel tight? You may have to shim the bearing pack.

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Thomas M.
R69s - R60/2 - R67/2 - R51/3

The Plunger
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Thomas,The brake housing is

Thomas,
The brake housing is up against the fork tube at the axle tube, the alignment boss is about 7/16" long and goes into the receiving bracket about 3/4 of the way. The brake housing is free of the hub, as the wheel spins. Here are two pics of the brake housing interior and the wheel hub. I've poured over the parts manual and can't find anything like a shim that's missing. I assume the brake housing mounts up against the axle tube on the fork otherwise the alignment boss would be useless. I don't see a shim between the housing and hub, and that makes sense because that would let debris into the brake chamber. The only other possibility is the wheel is laced off center, but how can that be? I'm stumped.

Brian

  • img_0750.jpg
  • img_0751.jpg
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Brian
'52 R67/2

808Airhead
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Who trued your wheels? If

Who trued your wheels? If they are way wrong on the offset that will make the wheel look like that.

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Thomas M.
R69s - R60/2 - R67/2 - R51/3

The Plunger
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Dunno, The "kit" bike I

Dunno,

The "kit" bike I bought came with both wheels rebuilt, laced and rubbered. The hub looks to be centered to the rim. There's an offset? Guess I'll review the wheel building chapter!
Thanks

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Brian
'52 R67/2

Captonzap
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Centered

Boy, you are a rookie! When the wheels are installed, they should both be centered in the frame, aligning with the center of the engine. If you stand back a few feet, squat down, you can pretty much tell what the wheels need. If the wheels run true, you can loosen one side so many turns of the nipples, and tighten the other side the same number of turns, and see how far over you displaced the rim. Best do it with the tires removed, so that you can check to see if the spokes on the "tighten"side protrude, and if there are enough threads left in the nipples on the "loosen" side.
Have fun.

CZ

The Plunger
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Yeah, I've never done wheels!

Yeah,
I've never done wheels! I assumed the job was done correctly by whomever laced 'em. Lesson learned.

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Brian
'52 R67/2

The Plunger
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OK, I can't seem to find just

OK, I can't seem to find just how much the hub should protrude past the rim on the brake side, and those goofy templates aren't much help.
Can anyone tell me the offset dimension from the end of the hub(splined end) to the rim on a 1/2 hub wheel? Buchanan's will need to know Wink

Thanks
Brian

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Brian
'52 R67/2

808Airhead
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Yes there is definitely an

Yes there is definitely an offset!! You should have the Barrington plunger bike manual. If you do,the offsets are on page #118. If you lay a flat edge against the rim (it may be tricky with tires installed) deflate your tires,and lay a long flat edge/yard stick on the rim edge to edge,and the wide part of the hub/open brake side,the lip of the hub where the spokes go into, should be RECESSED 5.4-5.6 mm (those crazy Germans .6 mm,haha) from the yard stick edge. Just check and see if it is anywhere like that. That is how I trued mine and they are perfect. For the first time in my life I bought a truing stand and trued all of my own wheels,it is satisfying and cool once you figure it out.

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Thomas M.
R69s - R60/2 - R67/2 - R51/3

The Plunger
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I'm a moron!

I need to apologize for my utter stupidity. My offset is, indeed, correct at about 6mm, it's my fender after all. After liberal nudging, loosening of bolts and nudging some more, I got it to center on the tire.
I'm going to stay off the forum for awhile so my idiocy doesn't infect the group. Verbal paddling will be accepted.
"Thank you sir, may I have another!?"

Brian

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Brian
'52 R67/2

Daves79x
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Please Don't!

What you went through, most of us, if we would admit it, have gone through many times during a build. It's the sure way to learn.

Dave

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Dave

808Airhead
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We are all here to learn.

We are all here to learn. The front fender/forks on the plungers can be a game. It is a trip to get everythimg perfect and we are dealing with 60 year old parts,it can be a lot of fiddling. This forum needs as much action as possible,so stick around! Post up some progress pics. I have found that a lot of times,the lower fender bow is bent/forks are bent,etc........ you have tpo massage it or buy new repro. Have fun! I lovce riding my plunger bikes!

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Thomas M.
R69s - R60/2 - R67/2 - R51/3

c8h18
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Joined: 10/14/2012
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I wrench with my thumbs so

I wrench with my thumbs so you are all light years ahead of me..yet my bike is right-on! There is room for everyone, at every skill level, in the hobby that is what makes it great! And hats off to those who share their deep experience, I have benefited many times over by folks answering my simple and sometimes easy questions.

The Plunger
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Yeah, Now I'm on the rear

Yeah,
Now I'm on the rear fender and it appears to be even more off. Time for the big rubber mallet!

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Brian
'52 R67/2

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