Ooohh, this is good news for me! I have a fully reconditioned Komatsu fuel injection pump that I'd like to get some money for! Maybe if I hang onto it for another 10 years, it will bring "collector" money!
Sad to say, for you D155 owners and repairers, this injection pump only fits the S6D140E, found in the WA-500 loader and the GD-825 grader.
Alternative fuel injection pump numbers are: Bosch 106675-4421. NP-PE 6P120/320RS3S. Local pickup is available. Pickup P/C is 6052. The models of machines and engines this pump fits, are as follows.
www.ebay.com.au
I've got a few boxes of Komatsu parts, but surprisingly, very little D155 stuff. I guess they really are an old tractor now. The Japanese are pretty ruthless on totally removing any support for old models.
A mate has a 1977 Toyota truck, and he wanted a thermostat housing for it (5R engine). I found out that Toyota had not only sent every new part for that model in their warehouses, to scrap - but they also destroyed all the blueprints and factory manuals. It's like the model never existed now.
You can get some basic aftermarket engine parts for the 5R, but nothing else.