2021 Doosan DX420LC-9C Crawler Excavator

This doosan DX420LC-9C (two of them were on that site, one 3-HB and the other 3-3B) and the first thing I went straight to was the engine bay – it’s the first place I always visit first – scania inline-6 the same as they run in these big doosans, the manifold is all gritty orange rust on the top, that’s just surface oxidation on the cast iron which is normal really, valve cover gaskets are the correct colour and were looking dry – there was no sign of problems around those six covers, turbo was a bit grimy but didn’t see any oil oozing out the cold side, and it didn’t smoke and idle fine – that’s just what I saw first when I was there.

Fuel side, I got aftermarket lefong filters on, they had FU-1103 water separator and fuel filter, these were ref numbered but I always note to any buyer that they are not OEM Doosan as they are prone to weeping, all the bowls are dry, I didn’t see anything pooling on the floor of that compartment, it had to have been last serviced properly. I proceeded to pump bay I went thru hoses at 350 bar EN856 rated; all clamps were all bolted solid; checked down to the swing motor, and checked the centre area of the swivel, which is where I usually find leaks with this many hours; a fair amount of grime and dark residue around fittings — Wait checked with my light in there again — yeah it must be because it was packed with dust and no oil residue, no oil ring around the base so seals holding it dry. Good sign. When Shutdown was complete I noticed that Machine was standing a minute or so and nothing fell to the ground.I’d say about 40-50 percent was still good on the grousers, they were worn but still retaining the height of their lugs, no shoes missing either side and the sprocket looked fine and had no missing teeth and no wobbling on the idler, that would be about what you would expect on a machine that was operating every day in aggregate and sand work. No, I didn’t see anybody in there cleaning it up after the show, between shows, but I know that the cab is so dirty, and you can see the mud tracked in and on the floor mat, but I don’t see anything wrong with the glass, all the glass is intact, the arm rest is all good, the pilot levers, they didn’t have anything on them. There is some dap around the lower body, there is no paint on the track frame areas that I could see, upper body has a fading paint job, dents on the boom and arm can’t see but you would want to change the bucket teeth before doing a big job.