73 Resurection and stupid questions

lomaxcm · Dec 21, 2013

I did search, really.

Dumb question but none of my books show how this is done.

I have the rear brake drum off and would like to take it apart to check the linings. On most bikes the linings and backing plate just lifts off of the drum but mine seems to not want to separate. What is the trick to getting the linings and backing plate separated from the drum ?

This may turn into my stupid questions thread while going through this bike. :roll:

These are in the bag of parts the PO gave me. Any idea what they are for ?

Thanks in advance.

Marc

pete.v · Dec 21, 2013

Re: 73 rear brake and other stupid questions

If off the bike and the dummy axle nut off, there should be nothing keeping it together.

I know this is obvious but the drum rotates around the shoes and plate therefore the only thing that could be keeping it together in the dummy axle nut that you may have screwed back on as to not to lose it. Sorry to dummy it up. I just looked at mine that I have store in the basement for the winter and other than the dummy nut, it just come right apart.

The other parts are unknown to me. They look like escutcheons of some sort or cable ferrules. The picture does not give a good representation of size.

Biscuit · Dec 21, 2013

Re: 73 rear brake and other stupid questions

I'm guessing those mystery parts are around 5/8" od. They are crimp ferrules for the fuel lines.

lomaxcm · Dec 21, 2013

Re: 73 rear brake and other stupid questions

Thanks, that is what I thought. Yep the nut is off the dummy axle and it rotates freely but will not come apart. I will investigate further and get out the sledge.

JK:

Ah yes, fuel lines, I knew I had seen them before somewhere. I have placed a Mikuni single on the bike so I will find some other place to use them for some bling. :roll:

Marc

kommando · Dec 21, 2013

Re: 73 rear brake and other stupid questions

If the drum is badly worn it can have a lip that stops the shoes coming out, worse is that the lip can corrode and grow. You have to try lifting the plate and in the small gap try to see what's going on inside and move attempt to move the shoes so they are the smallest diameter.

lomaxcm · Dec 21, 2013

Re: 73 rear brake and other stupid questions

OK, I fiddled around a bit and got the drum separated from the linings and plate. It was just a little hung up on the center stud.

The linings are new YEA! the PO did some good things. But now I have a bigger concern. The stub axle seems very loose in the brake drum.

Referencing the diagram below here is what I noted.

Item 32 looks to be some kind of lock ring but it is not screwed onto anything. It just spins. ????

Item 21 has about 1/8" of end play. It has flats on it making me think it is supposed to screw into something but it also just spins and does not tighten down.

I put the drum back on the bike and tightened it down and it just seems sloppy, With the drum on the bike I can now pull the brake shoes and backing plate right off.

Maybe I am over thinking this and when the wheel goes back on and everything is tight it will take up all the play. ??

Am I worrying about it too much or do I have a real problem with the rear drum?

Marc

Torontonian · Dec 21, 2013

Re: 73 rear brake and other stupid questions

The brake -side Dummy (short) axle was designed to be a sloppy fit intentionally. When you refit the brake assembly you tighten up the dummy axle nut FIRST to about 50 lbs. before inserting the long axle on the right side ,it takes about 80 lbs. of force. Seeing as you have the hub apart anyways I would grease the double row bearing hidden in the center casting. Dust cover,felt,Big washer, exposes it . Make sure that big circip is home good n' tight, it has worked itself out of tight slot on others before. Dont remove it unless you rotate the expensive double-row with finger and feel anything other than smoothness. That bearing gets neglected because it's so out of sight out of mind.

lomaxcm · Dec 21, 2013

Re: 73 rear brake and other stupid questions

Bearing looks good and I lubed it up. Drum back on and chain back on.

Now if I could just get my wheels back.

They are getting new stainless spokes, new bearings, trued, tubes and tires. :wink:

Things are looking up on the old guy. Still lots of parts to replace and things to do but it looks like I may not have any real major issues. I am glad of that.

Marc

Time Warp · Dec 21, 2013

Re: 73 rear brake and other stupid questions

With the brake cable removed the arm can rotate backward engaging the brake a little ?, (iirc) pulling the arm forward a little, the backing plate comes out easily. ?

Matt Spencer · Dec 22, 2013

Re: 73 rear brake and other stupid questions

Cups fancy dress ends for Oil Lnes ?? , whats the dimensions .

lomaxcm · Dec 22, 2013

Re: 73 rear brake and other stupid questions

I don't think they are big enough for oil lines. They are .65" long and .63" OD. There are no slots for clamps or anything. I am sure they are the fuel line cups as seen in #20 below. On second thought I looked at the fuel line and they are too big for that. Too small for oil and too big for Fuel ?? Still a mystery.

Maybe they go on a 1953 turbo encabulator ??

Marc

solarmoose · Dec 22, 2013

Re: 73 rear brake and other stupid questions

lomaxcm said:
Now if I could just get my wheels back. They are getting new stainless spokes, new bearings, trued, tubes and tires. :wink:

are you using Woody's Wheel Works?

lomaxcm · Dec 22, 2013

Re: 73 rear brake and other stupid questions

solarmoose said:
lomaxcm said:

Now if I could just get my wheels back. They are getting new stainless spokes, new bearings, trued, tubes and tires. :wink:

Click to expand...

are you using Woody's Wheel Works?

I sure am. He is local and I have been doing business with Woody for more years than I care to admit. I trust him fully and he has worked miracles on some of the problems I have presented to him.

Now to change the subject a little. What does everyone thing about the anti wet sumping valves. I got one from Commando specialties and after reading up on them and undecided. Some say they are the greatest thing since toast and others say it is a great way to destroy your engine. I actually have not had the bike long enough and it is currently a bit torn down so I do not know if it actually wet sumps badly or not.

I may get it all back together, ride it a while and then see if it really needs the valve.

Marc

concours · Dec 22, 2013

Re: 73 rear brake and other stupid questions

lomaxcm said:
solarmoose said:

lomaxcm said:

Now if I could just get my wheels back. They are getting new stainless spokes, new bearings, trued, tubes and tires. :wink:

Click to expand...

are you using Woody's Wheel Works?

Click to expand...

I sure am. He is local and I have been doing business with Woody for more years than I care to admit. I trust him fully and he has worked miracles on some of the problems I have presented to him.

Now to change the subject a little. What does everyone thing about the anti wet sumping valves. I got one from Commando specialties and after reading up on them and undecided. Some say they are the greatest thing since toast and others say it is a great way to destroy your engine. I actually have not had the bike long enough and it is currently a bit torn down so I do not know if it actually wet sumps badly or not.

I may get it all back together, ride it a while and then see if it really needs the valve.

Marc

Search and read about anti-sump valves. It'll make oil threads seam tame. :lol:

lomaxcm · Dec 22, 2013

As it came home all dirty.

Up on the lift and partial tear down.

Interesting on the swing arm. It has two bolts into the cross shaft. Every one of the bolts was loose and thus the swingarm was loose. I took everything apart and it checked out good. Reassembled properly with lock washers and locktite and it is now rock solid. Yea I know, I have a lot of cleaning to do. :roll:

Going back together. If I only had some wheels. :lol:

I still have to do all the fluids and continue to clean and polish, but it should be on the road soon. Well middle of January anyway.

Marc

concours · Dec 22, 2013

lomaxcm said:
As it came home all dirty.

Up on the lift and partial tear down.

Interesting on the swing arm. It has two bolts into the cross shaft. Every one of the bolts was loose and thus the swingarm was loose. I took everything apart and it checked out good. Reassembled properly with lock washers and locktite and it is now rock solid. Yea I know, I have a lot of cleaning to do. :roll:

Going back together. If I only had some wheels. :lol:

I still have to do all the fluids and continue to clean and polish, but it should be on the road soon. Well middle of January anyway.

Marc

Those extra two bolts (set screws?) on the swing arm shaft appear to be a variation if the Kegler mod. I used Grade 8 HHCS because the small socket head on set screws doesn't afford much torque capability.

Torontonian · Dec 22, 2013

Those are definately fuel line crimper end pieces. I have a small bagfull in front of me with the special crimping crusher tool.

lomaxcm · Dec 22, 2013

concours said:
Those extra two bolts (set screws?) on the swing arm shaft appear to be a variation if the Kegler mod. I used Grade 8 HHCS because the small socket head on set screws doesn't afford much torque capability.

That is what I thought when I saw them. Someone did something to it in the past. They are actually threaded into the cross shaft so not "set screws" and did tighten down very good. Time will tell if they actually work or not. :shock:

AND Mystery solved and put to bed on the collars.

Marc

lomaxcm · Jan 1, 2014

I am getting the wheels back today and have questions about the axle torque specs.

Yea new bearings and heavy duty stainless spokes courtesy of Woodys Wheel Works. And my favorite Avon Raodrunner tires.

It seems in various threads there are different opinions. So my super gurus what ye say?

Old Britts has 80 ft/lbs for the rear axle and stub axle.

They also show 60 ft/lbs for the front axle. 10-15 ft/lbs for the pinch bolt.

My owners manual and service manual both say tighten them up. GREAT specifications here

BTW: Happy New Year everyone.

Marc

Hobot · Jan 1, 2014

Yep those two bolts are well done mod, look backed up by good bead thickening of the tube metal and in a good location & angle to actually nail down spindle not to spin or wiggle sideways. Does appear swing arm went through a rear axle fission event that let tire tip into the braced area wiping off the paint. Hope you get nice shoes soon to got out in public with.

73 Resurection and stupid questions

lomaxcm

pete.v

Biscuit

lomaxcm

kommando

lomaxcm

Torontonian

lomaxcm

Time Warp

.......back to the 70's.

Matt Spencer

lomaxcm

solarmoose

lomaxcm

concours

lomaxcm

concours

Torontonian

lomaxcm

lomaxcm

Hobot

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