I just received my new brake quadrant from Lang's and now I need to install it. Do the rivets need to be bucked hot or cold? Also any idea how long to trim the rivet from the head. I thought I read something about 1.5X the head diameter but I cant find that post now. Thanks!
Hot. You need a heavy weight clamped against the back end of the rivet. You also want one person to apply the heat and another person to do the pounding.
For hot rivets it seems that the stuck through should be about 2 times the diameter. You have to remember that the rivet will compress into the over sized hole and you still need enough to form a head.
Of course if you have a tool like this it would be easier:
Looks like they were running over 2 times the diameter on these.
Unless you are building a car for show, why not just use bolts to fasten the quadrant? I know there will be some that will trumpet the advantages of rivets but for this application there is no reason other than complete authenticity or nothing better to do with your time to use rivets.
Erik has it, I used small carriage bolts, ground the heads down to mimic the rivet heads and used square nuts with lock washers on the bottom. No one ever seems to notice and these have the advantage of being easily retightened. KGB
Bolts can work, use grade 5 or better with grade 8 fine thread. Locktite on the nut threads too.
Perfer to hot rivet, cut the rivet shank to 1 1/2 to 2x the diameter of that rivet.
Paragraph 761 in the Service Manual:
"Insert the two internal gear case pins through tubing and case. When replacing pins in an old gear case it is advisable to use No. 2 taper pins (See "A" Fig. 393) as the pin holes in both tubing and case wear slightly oversize and sometimes become enlarged when driving out the old pins."
Note the recommendation of using tapered pins.
No mention of heating the pins (or riveting/peening them for that matter) but it was probably done cold.
Steering gear case pins and frame rivets are not the same thing.
These ribbed bolts worked well when I replaced the brake quadrant.
The ribbed shank is large enough that it is a tight fit in the large holes in the quadrant and frame so there is no slop. They pulled in snugly when the nuts were tightened and had no tendency to spin (nuts on the frame side). I used Loctite and lock washers just because that's how I am. Add these to the list of things to check occasionally for tightness.