Guys, new to bobcats and have an issue with my T190.
Here is background, purchased a 2003 T190 with 3400 hours on it. Changed fluids and did simple services to the unit as soon as we got it. Ran the unit for 150 hours or so moving dirt and clearing timber. From the beginning the unit seemed to be sluggish when going uphill (seemed to stall out with levers full forward, back off and start again)but on flat ground seemed to work well(although I have never driven or owned a tracked unit). Also in mud the left drive would not spin out.
While moving a lot of dirt the left drive seemed to start to feel like it had loss of movement to where I started to modify my driving to compensate and use the right side in reverse to turn right instead of driving forward with the left. It feels like surging almost, like it moves fluid then stops then moves fluid again. You have to move the left joystick a few inches before it seems to engage the drive as well.
Based off what I researched and I found videos describing how to check the drive motors by looking at the case drain leak by. I completed the leak test and found that both drives had "excessive" leakage( full hose flow), but the left drive appeared to be more. Also during this process and when I first purchased the unit I checked the case drains for each drive but no real material/ debris in the screens.
At this time my assumption was that the drive motors were my problem so I purchased 2 rebuilt drives from Final Drive Parts and installed them. Once I started it up and driving it i could tell that the drives did not stall out going up the hills but the left drive still was "surging" and "delay" in joystick on the left drive.
Based off above I assume I have a drive pump issue, so I ran tests by placing gauges on charge and then each drive. At idle the charge pressure is 80-100 psi, and at full RPM 160 psi. Right side pump discharge it maintained 160 psi charge pressure and the drive pump pressure I got up to 4000 psi and ran out of my gauge. Left drive maintained 160 psi charge pressure until the "delay" in the joystick then it jumped to about 220 psi but then dropped back to 160 psi. I then continued to load the pump up until 4000 psi as well. I could repeat the process every time.
I am unsure why the pressure jumps when the left pump actually engages.
At this point I think my drive motors and drive pumps are in good conditions? Thoughts? I am not sure why the left drive does not move the unit though. I am unsure what this "delay" or loss of movement is.
Is there a relief valve somewhere that can only affect the right side, am I missing something?
Thanks
Here is background, purchased a 2003 T190 with 3400 hours on it. Changed fluids and did simple services to the unit as soon as we got it. Ran the unit for 150 hours or so moving dirt and clearing timber. From the beginning the unit seemed to be sluggish when going uphill (seemed to stall out with levers full forward, back off and start again)but on flat ground seemed to work well(although I have never driven or owned a tracked unit). Also in mud the left drive would not spin out.
While moving a lot of dirt the left drive seemed to start to feel like it had loss of movement to where I started to modify my driving to compensate and use the right side in reverse to turn right instead of driving forward with the left. It feels like surging almost, like it moves fluid then stops then moves fluid again. You have to move the left joystick a few inches before it seems to engage the drive as well.
Based off what I researched and I found videos describing how to check the drive motors by looking at the case drain leak by. I completed the leak test and found that both drives had "excessive" leakage( full hose flow), but the left drive appeared to be more. Also during this process and when I first purchased the unit I checked the case drains for each drive but no real material/ debris in the screens.
At this time my assumption was that the drive motors were my problem so I purchased 2 rebuilt drives from Final Drive Parts and installed them. Once I started it up and driving it i could tell that the drives did not stall out going up the hills but the left drive still was "surging" and "delay" in joystick on the left drive.
Based off above I assume I have a drive pump issue, so I ran tests by placing gauges on charge and then each drive. At idle the charge pressure is 80-100 psi, and at full RPM 160 psi. Right side pump discharge it maintained 160 psi charge pressure and the drive pump pressure I got up to 4000 psi and ran out of my gauge. Left drive maintained 160 psi charge pressure until the "delay" in the joystick then it jumped to about 220 psi but then dropped back to 160 psi. I then continued to load the pump up until 4000 psi as well. I could repeat the process every time.
I am unsure why the pressure jumps when the left pump actually engages.
At this point I think my drive motors and drive pumps are in good conditions? Thoughts? I am not sure why the left drive does not move the unit though. I am unsure what this "delay" or loss of movement is.
Is there a relief valve somewhere that can only affect the right side, am I missing something?
Thanks
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