CJLennon
Well-Known Member
Hey Folks, as always, thanks to all for making me look smart. I have a Komatsu PC300LC-3 who upper carriage hydraulics all run very slow. The machine walks perfectly but the upper hydrualics (boon, arm, bucket, swing) all operate very slowly. My first thought is that both pumps are fine because the machine walks perfectly. But as I review the hydraulic diagram, I can't find anything in common that the upper body hydraulics (boom, bucket, arm, swing) have with each other but NOT with the travel. So, this one has me stuck. But I noticed there is that Straight Travel Valve that seems to be involved in both the travel and the upper body stuff. That is the only thing I can see that might be the problem. So, any takers on this one? Getting desperate. I'm too old to use the Hickory Highlift (i.e., shovel). As always, thanks for thinking about this one!
Chris
Chris