Alright here we go. First off, the hardware kit Napa found was part number 2314 and was not correct. Springs were too long and the Maxi-pack didn't have the pins or other associated hardware. Back to square one. I will run the H9200 part number to ground for comparison.
Attached you will find a photo of the front hardware in question for the 5k lb axle. I apologize as I have no photo of it assembled, I got overzealous and didn't take photos on disassembly. I do not yet have the rear wheels/drums off as I am waiting to get the fronts back together. Call it a bad setup that requires two corners be grounded at all times and chocked in pace.
Secondly I traced the line. Surprisingly, its a second line to the hydro-vac. Refer to the photos attached. It is a larger 5/16" line that juts out the side of the master reservoir, then runs adjacent to the primary 1/4" line back to the hydro-vac. In the photos, the red is that second, larger line and the blue is the primary, smaller line. The blue connects into the back of the hydro-vac by the diaphragm, and then pops out the top of the hydro-vac at the end of the piston and immediately connects into the frame where it T's off to fronts and rears. The larger 5/16" line leaves the tip of the hydro-vac piston and doubles back to the master. Im assuming its a high pressure return line? Also none of this follows my books, so I am assuming the setup is not factory?
Due to this, I either need to return the new master I have for a single piston with a second outlet model, or keep it and replace the hydro-vac with an appropriate unit that is only a 2 line unit. Any advice? Hydro-vac is at minimum getting rebuilt.
*EDIT* Additionally, the hydro-vac is not factory original. It has a "reman" sticker on it so this is a later life replacement. Im wondering if previous owner overhauled the system at the time of replacement to a different hydro-vac and opted for the additional line and different master. Again, no master I have yet seen that is factory for these trucks runs this two outlet setup.
Another point of contention: before being ripped apart, this sucker stopped, and I mean STOPPED on a dime (or rather skidded). It took an extremely feather foot on the brakes to not lock them up, even after adjusting the pedal for travel. I chocked it up to rolling around empty, but I now wonder if the system was upgraded for better stopping power under load.
*EDIT* *EDIT* Hydro-vac is a rebuilt unit of the "Prior Rebuilder" company out of Garland TX. Tag reads: 22BBM 2501850 Digging into that now to determine application of this specif hydro-vac unit.
