Flushing Dif and Booster Disassembly
Hi Shane
Concerning flushing the differential are you going to remove it from the axle or try and do it in place?
Trying to flush in the housing has some issues as you probably guessed of loosening dirt and gunk up but with out really not getting it out of the housing and having work into the axle bearings. When I first restored my HUP and C60S years ago I flushed the differentials by draining the gear lube and refilling with a 50/50 mixture of kero and gear lube and then drove the thing up and down my drive I think all this did was flush out the old lube because it really didn't come out with much stuff.
On my C60L and recent HUP overhaul I pulled the differential units and really cleaned them. One thing I can say about trying to clean the housing and the gear units is the only way to really get them clean is with real hot water or steam. I used Gunk to really loosen up the old gear lube, then washed them with 170F water.
Concerning dis-assembly of the brake booster, do you have the manual? Don't try without it and pay particular attention to the actual valve assemble very easy to damage. With care you can take these apart clean and reassemble without problem. Checking them on the bench for leaks is much much easier than installing in the truck. Look/listen particularly for leaks around the piston barrel.
Cheers Phil
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