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| | | | Joined: Jun 2012 Posts: 142 Shop Shark | | Shop Shark Joined: Jun 2012 Posts: 142 | I was looking for a disc brake conversion for my 39 jc truck and found an article on the stovebolt tech tips.but I just can't fully understand it.he got his parts from a nissan hardbody truck which is awesome because it keeps it 6 lugs and that's what I want.now the article says to measure the seal and bearings id and the spindle od.and he says to blue it? What does that mean? Any and all help is always appreciated. | | | | | Joined: Sep 2010 Posts: 1,707 back yard wrench turner | | back yard wrench turner Joined: Sep 2010 Posts: 1,707 | I did a disc brake conversion on my '38 1 ton keeping 6 lugs. I used 78-80 c1500 calipers and 78-80 k1500 rotors. The master cylinder is a 1 inch bore. I fabricated my caliper brackets out of plywood to get the right shape and positioning then cut them out of steel. I installed tapered bearings, residual valves, ran new lines and I was good to go or stop. 
Last edited by Wayne67vert; 01/03/2015 1:45 PM.
Wayne1938 1-Ton Farm TruckStovebolt Gallery Forums1989 Silverado 1996 Mustang GT convertible When I die, I hope she doesn't sell everything for what I told her I paid for it! | | | | | Joined: Jun 2012 Posts: 142 Shop Shark | | Shop Shark Joined: Jun 2012 Posts: 142 | With this set up you keep your original spindles and no mods needed? | | | | | Joined: Sep 2010 Posts: 1,707 back yard wrench turner | | back yard wrench turner Joined: Sep 2010 Posts: 1,707 | I did change the axle to a 51 for the larger king pins. But it will work with your axle and spindles.
Wayne1938 1-Ton Farm TruckStovebolt Gallery Forums1989 Silverado 1996 Mustang GT convertible When I die, I hope she doesn't sell everything for what I told her I paid for it! | | | | | Joined: Jun 2012 Posts: 1,747 'Bolter | | 'Bolter Joined: Jun 2012 Posts: 1,747 | I think the "to blue it" advise was to use machinists blue dye to confirm fit. Too close, and the "blue" is rubbed off. The advise from Wayne67vert is good. You can also keep the "ball" bearings if you want. That should get some comments. The backing plates have to come off so look at the tech tips and be careful to get stuff to fit properly. The plywood pattern idea is a good one. Makes getting a good fit and proper spacing a less frustrating effort.
Steve H
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