Sounds to me like you have a world of issues to try to solve. I don't think there are many anywhere that could provide the kind of information you need to solve all the issues. What was changed in the pumps? Are all the valves and cartridges installed in the right places? Is there something plugging up some sensor lines? Are the electronics hooked up and set up properly. Were it my problem I would start at the pump and make sure it is working properly before anything else. You can use the speed of the tracks as a poor man's flow meter as long as the swivel and travel motors are working properly. Some kind of timer is necessary. Paint one pad on each track. Pick up that side of the machine with the implements, put the travel in high speed mode. Start the track turning to full speed and start timing the revolutions after the track has made a full revolution at speed. I used to do three turns to time. This will at least show you which pump is low and by how much. The pressures you are giving are way out of spec. Pilot pump pressure as I recall was 425 PSI. Implement pressures in normal mode were 320 KGCM2 or about 4,500 PSI and in travel or power max should be around 360 or around 5,100 PSI. The scenario you are describing tells me the pumps are not destroked at the proper pressures.
The one thing that has not been addressed in your post is the compensator valves. We didn't have much trouble with those in the 200 class of machine like the 300 class but at times they were an issue. They can be resealed but most people of that era just replaced them. If one leaks through then the problem shows up on most all the functions. You might try swapping one from each side of the valve and then check something that doesn't involve two pump function. One track at a time locked up so it goes over relief might do the trick.
I'll keep thinking a bit about this and let you know if anything else come to mind.
Good Luck!
ok so today i think i had a little breakthrough , i was relieving one of the track circuits and then relieving the boom and the arm started creeping in just a little , just barely moving .. so this has to be a compensator issue ..
i was also thinking that maybe the compensator for one of the tracks might be bad and this is why when i relieve the left track the bad compensator makes the other side build pressure or seem to / tries to move just like the arm . to confirm this i will raise the side i think has a bad compensator and relieve the other side and look for movement ?
I think that LS pressure is leaking somewhere or being by-passed to the tank ..
Maybe someone can tell me more about these compensator issues ? what to look for ? how bad will these compensators affect my machine ?
I did do some checking around today i did get the two pumps to be somewhat balanced. both pumps / tracks at max pressure currently (200kgcm) and engine speed remains at 2250 rpm for both tracks respectively . both tracks build the same pressure now ..
The arm is slow but when relieved it builds 330kg/cm2
boom is slow but builds 330kg/cm2
bucket is slow but builds 330kg/cm2
swing builds around 260-280kg/cm2
both tracks on both directions build 190-200 kg/cm2
all of these were done with the pumps split .. it swings faster with them merged because i guess more flow ..
