hi there on my last job i was driving a komatsu wheeldigger for a local farmer who himself has 10 years experience as a plant fitter and whos brother works for hm plant as a fitter. i had a problem with the machine where when it had been working for half an hour or enough to get the oil hot, it would stall if any of the hydraulic services were held on, even for a split second, and whenever i had to travel the power would die away. it was almost as if there was a length of rope wrapped around the driveshaft! we had komatsu fitters out to look at the machine and adjust the relief valve but this didnt really help and as it was out of warranty they really werent that interested. eventually we all came to the conclusion that it was more likely than not, to be a problem with the hydraulic pump as we had ruled out every other possibility. i hope this helps.
Dean, plymouth, October 2009
