Komatsu digger ID?

Hi all, I just bought a Komatsu digger and I'm picking it up in a few days, but there's some doubt about what it actually weighs. It was listed as 5 ton, but the seller doesn't have model numbers or anything like that. I'm thinking it might be a 4 ton instead—maybe a PC40-1, PC40-2 or PC04—because I can't find any old photos of 5 ton Komatsu models anywhere. The track width is 173cm. Does anyone recognize these specs? The pins are 45mm, which fits either 4 or 5 ton machines, and the twin ram blade looks like it's in that weight range too. Also, where would I find the serial number or model number plate on this thing? Thanks

I found a listing for a PC40-3 from a Japanese used equipment dealer. The page mentions a KOMATSU PC40-3 with a 0.1㎥ bucket capacity. You might want to check that model out, as it could be what you've got. It's worth looking into whether yours matches up with that spec.

With most Japanese excavators, the model numbers show the weight in metric tons. So a PC40 means four metric tons, which is 2,204.62 pounds per ton—that works out to 8,818.5 pounds. Usually that's the machine's weight in working condition, bucket not included.

On Komatsu mini excavators, they stamp the serial numbers on the boom turret on the side opposite the cab. Looking at your photos, that cab doesn't match any Komatsu I've seen before. The vines covering the pumps and the buildup on the engine side suggest this machine's been sitting idle for quite a while.

Good luck with it.

We picked it up and found the label showing PC40-2, so I'm pleased with that – especially since it was listed as 5 ton, which was actually what I was after. They'd told us it was a runaway diesel and that they'd stopped it by cutting the fuel, so I figured it was worth trying. The machine had only seen occasional use over several years, then sat idle for a year after they tried restarting it about 5 months ago. Turned out the fuel rack was stuck, but freeing it up wasn't difficult. It runs well now and managed to load itself onto our truck without any issues.