Slow Speed Diesel Engines > Other Slow Speed Diesels
McDonald Imperial Super Diesel Crude Oil Engine
cobbadog:
Back at the beginning of doing this job I first had to get the engine of choice around to where I was going to work on it. So I winched it onto the carry all of the David Brown 30C Cropmaster, in the background is Lorry our main transport when going to Rallies with our caravan towed behind it. Then there is the good injector that will need stripping and cleaning. The flat belt pulley came off like a dream even though the 3 bolts were badly rusted away and each a different size socket was required to undo them.
cobbadog:
This is the oil pick up from the bottom of the sump. The original screen was almost non existent so I found some stainless steel 'termi-mesh' used for pest control on houses and soldered it in place. It looks rough but it wont let go.
cobbadog:
Thanks Glort, I put around a total of 2 years into the D.B and last run was about 6 months of being in a rush. Even this engine when loaded is a counterweight for the steering. When we go to a Rally I usually put the carry all onto which ever tractor is going and an engine on that and a couple of mowers around the truck tray.
I had no choice but to finally replace all the timber on the deck of the carry all as the original had rotted completely. It is 25mm thick hardwood. If I build another one I would use the usual T piece set up for the 3pl pins and use channel iron and some checker plate.
I have done a trial on the engine oil I use in Lorry which is what I will run in this and the oil runs straight through as fast as I can pour it and ambient temps so I dont expect any issues there. Engine also runs at a huge 7psi oil pressure as it only pumps oil to both crank shaft babbit bushes. All other parts are splash fed like the big end and the bottom of the bore and gudgeon pin once running. The gears that drive the oil pump, cam and governor are fed oil by picking it up using the gears and it winds its way up to the top then drips over the roller that follows the cam and operates the push rod to the valve.
cobbadog:
This is one of the offending gibb keys. Welded a bolt to the gibb key with the head cut off so to use the thread with a nut, then tried using the slide hammer with little result so next was a piece of pipe and try to tighten the nut up. All the time using this oversized "C" burner for the LPG. After the key was out the 3 leg puller was loaded up to pull the flywheel off.
The second pic is of the gibb key that broke off flush with the flywheel and then required many holes to be drilled through the key to remove as much metal as possible. I actually got a 3/16" hole down the centre and almost full depth when it snapped off. Next was to circle that using 1/8" bit and got four holes and again one snapped off. I kept stepping the small holes up in size until it was either touch the flywheel or the crank shaft then used a home made slotting chisel to dig out the key.
dax021:
Good one for your perseverence in getting that wheel off. I would have lost my patience after it broke off like that and taken an 8 lb hammer to the thing
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