Recent content by happymachinist

Little more progress. Reassembled the oil pump/bearing carrier and set the end play. There were approximately 7 steel shims of varying thicknesses and 7 plastic shims/gaskets right at .007” I didn’t pay attention to the order they came out but when I reinstalled them I alternated...

Your picture is part of the equation...but I think I also need the shuttle/diverter valve Mac referenced to work with the hydraulic unloader. The hydraulic unloader doesn't allow the compressor to build pressure until the unit has oil pressure. I do like how yours is tied into a multi-port...

Thank you, this is the EXACT info I have been looking for!! Knowing the correct nomenclature makes all the difference in a guy's google search. I'll do some more research but if I had to order today I'd get this one from McMaster to match the other brass tid-bits. Thanks again!!

So I am getting close enough that I would like to get parts ordered for dual control. This 3 way check valve is what ROTARYCOMPTECH used in his video years ago. Does anyone have a part number or know where to get something equivalent? If not this part maybe someone can help me understand...

I was able to rig up a fixture to ream and lap the high pressure wrist pin bushing. Spec is .0004”-.0009” clearance. I ended up at about .0008” I was also able to strip and rebuild the hydraulic unloaded valve. The small brass component in my hand is what I think failed. I could hear a...

A little more cleaning, inspection and A LOT of flat “lapping” on the ol rock. Both cylinders are in good shape. High pressure is nearly “perfect.” Low pressure cylinder is within .001” of being round and straight (no step) so I’ll most likely just knock the glaze off with a flex hone to...

Thanks for the clarification. Exact ROC isn’t needed. I have thought similar things about the rod. I’d also like to see the oil slot in the rod/crank bearing lengthened so that the rod sees oil pressure for a longer duration. (This would only help the wrist pin bearing) I’m with you on the...

What model or ROC do you have? My new bushing looks as thick (per side) as yours looks in this picture. New it would have been much thicker per the gap on top of the wrist pin. I’m trying to work through getting the high pressure rod and wrist pin bearings more oil. I’ve got some ideas…some...

Here are some disassembly pictures. There was some black sludge at the bottom of the crank case that is expected from non detergent oil, but not a ton. The screen was pretty clean which was encouraging. The rod bearing pictured is the high pressure cylinder. As I mentioned the wrist pin...

This weekend was fairly productive, To cut to the chase, I saw/heard/felt some things that led me to dig deeper than I wanted but it was good that I did. The HP rod crank pin bushing is ROACHED! The roaching of this bushing seems to have lead to an also roached wrist pin bushing. Quick...

I don’t think mentioned it but I have been thinking about how nice it would be to have dual control on this air compressor. The main reason for getting this air compressor is for sand blasting parts prior to powder coating so a continuous run option makes a lot of sense for my situation...

After some more investigations it appeared that the unloader tower on top of the head was not functioning properly. I would run the compressor pump (not hooked to the tank) and apply air from my little compressor to the hydraulic unloader valve (brass valve on the side) and whether I applied...

With the cast iron pulsation damper sealed up I have been able to dig into the compressor a little more. I went ahead and added a motor tensioner bracket to the tank top plate. As mentioned before, I like the looks of the old cast iron motor mounts, but they **** to get things tensioned and...

Well we’ll see how this works long term. I cleaned everything up and fabricated a 3/4” thick aluminum spacer to move the seal point up by the same 3/4”. This puts the o-ring on a fresh chunk of shined up pipe. Flat sanded gasket surfaces, new o-ring, new hand cut gasket and bolts. I tried...