Komatsu PC200-8 travel sluggish

thepitstop · 2025-11-26T04:38:49.000Z

Just purchased. 8k hrs. Seems to be well maintained but the problem I'm having is when traveling, it's dead slow. Same in lower, med and high speeds. Even under full RPMs and auto idle off...doesn't matter. What does work is when you stroke the pump by touching any of the main joystick controls, you can hear the pump kick up and we start moving as usual. That's good until it "calms down" again and then back to very slow. I have gauges on the way I've ordered. Any idea where to start and what to do?

Started by thepitstopNov 26, 202522 replies

Simon CSuper UserAug 12, 2026#21
thepitstop said: Problem Solved. Under the cab remove the floor pans and there is a the pilot valve (I belive thats the term). The 2 travel levers connect to the manifold there. There are 2 pressure sensors. 1 black (20Y-06-21710) and 1 red (206-06-61130). I replaced both and things are working normal again. Very easy and simple fix. Click to expand... Thanks for posting solution. Simon C
thepitstopJunior MemberAug 12, 2026#22
You're welcome. Nobody learns if the solution isn't posted. Thanks for all the imput from everyone. I did learn quite a bit.
thepitstopJunior MemberAug 12, 2026#23
Marcrus said: Sounds like pressure switch or wiring for travel isn't working which will cause pumps not to ramp up or ls pressures are low. Sounds more like pressure switch under cabin. Main reliefs could also be low but if pumps aren't ramping and will ramp off other circuits I'd be checking the pressure switches. Comp valve seals could also be blown Click to expand... Thanks Marcus. You were spot on! This indeed was the problem and was a very simple fix.

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