Have a question about Heathkit Boonie brake

G

GTO

#1
#1
Heres a pic, the two nuts on the sides are just spinning so I can't remove the rear tire and also clean the brake.

Is there a trick to it? they look like lock nuts. The only way I can think of is to cut a slit and use a screw drive to hold the bolt while using a wrench. What am I missing here? :doah:

 
OldMan

OldMan

New Member
#2
#2
Looks like the heads are inside the brake drum...

Is the left side of the wheel all hub, or is there a spacer between the hub and axle hanger?

Is that center hub a flat plate or is it a cup shape like a band brake drum?

Can you remove the rear axle and separate the wheel from the brake?
 
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G

GTO

#3
#3
Old man, they are filister bolts, the brake is enclosed in a drum and you can't take the wheel oof without removing the nuts and pushing in the bolts. It's got to be a pain getting the bolts back in too!

Thanks to Josh howard for the pic's. >> http://s199.photobucket.com/albums/...onie brake down/?action=view&current=8dc4.jpg

SOMEONE must of taken their wheel off,, what gives people? :confused:

I might have to cut slits then use a screw driver to hold the bolt while turning the nut. I think I will then weld nuts inside to correct the idiot design! :doah:
 
J

jimh

#4
#4
They may have had casting around the heads on the inside. You could cut them off with a cuttoff wheel if you had to. Then have some new ones brazed in if the plate is aluminum. Or have the holes in your brake plate milled square and use carriage bolts.
 
kbs8ball

kbs8ball

Active Member
#5
#5
my boonie was missing the rear tire and all the rest of the parts when i got it...it now has a drum brake on it but i set it up a little different....
 
G

guyw

New Member
#6
#6
...not gonna be adjusting the chain via the rear axle with that setup.

...but that aside, I often look at some details on old minis and ask myself, "what WERE they thinking?"
 
CaliJeff

CaliJeff

New Member
#8
#8
Just grab a chisel, sharping it a bit, and whack at with a big:censure:hammer. Split those things right off. You should be done now, and you're welcome.

Then again, I'd see what happens when you take that big ol nut in the center off first.
 
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m0trfinger

m0trfinger

New Member
#9
#9
NO NO NO!!

1st. If there is no play between the axle bolt mount and the axle bolt, you won't be able to do the procedure below.

Loosen the rear axle bolt, move the rear wheel assembly forward, then undo the chain by pulling it slightly away from the rear, and spinning the wheel forward.

Just remove the axle bolt and pull the tire from the opposite side of the rear wheel sprocket!!!

The brake assembly will fall out allowing you to remove the wheel.

Reverse the above procedure and you won't have to kill anything with a chisel!

I firgured this out when one of my rear wheel hub bearings froze.
 
9

99VenomSVT

New Member
#12
#12
Np cutting is involved, pop the chain off then loosen the nuts. The wheel should pull out from the non sprocket side at an angle. This is actually one of the better drum setups I have seen.
 
G

GTO

#13
#13
Moterfinger and 99 were right! :thumbsup:

All I had to do is wiggle and pull the left side of the wheel out, the brake drum unit just sits on two screws and pulls right off. :thumbsup:



The brakes are just like a car and should work very well. :thumbsup:
 
KB2ROCKET

KB2ROCKET

Active Member
#16
#16
now that this drama has reached its conclusion I would like to ask about the boonie bike rear sprocket has anyone found a direct replacment for the rear sprocket it seems that it is a part of the drum assy.
 
G

GTO

#17
#17
KB2ROCKET said:
now that this drama has reached its conclusion I would like to ask about the boonie bike rear sprocket has anyone found a direct replacment for the rear sprocket it seems that it is a part of the drum assy.
Click to expand...
Drama concluded? :confused: We're just getting started. :thumbsup: Havent even covered the Jack shaft which doesn't want to come apart. :doah:

The sproket looks like any typical inset sprocket but just bigger. I'm sure theres something out there. I can take pic's and mesure if you like. :thumbsup: I'm lucky the sproket is in perfect shape and the brake bads are good, BTW my son swears he saw these pads in a mower shop and if thats true there has to be a drum for them.

 
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KB2ROCKET

KB2ROCKET

Active Member
#18
#18
I have seen the sprockets with a drum riveted to it but the original is all one piece
.
seing as how I converted my boonie into a 3 wheeled tractor I have the original rear wheel/tire and brake assy. in front of me now
.
man I love this stuff
 
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