treemuncher
Senior Member
Has anyone else out there had issues with Lamtrac mulchers and final drive issues? My machine, an LTR8300-T, was not tracking straight due to a speed sensor on the travel motor being out. It read the speed fine in reverse but not in forward motion so the right track would push harder and the machine was always tracking heavy to the left if the joystick was kept in the straight forward position.
After conferring with the factory engineers via the internet and remote computer diagnostics, I replaced the $600 Rexroth hall effect speed sensor and that solved the problem, temporarily. After 6 hours of use with the new sensor, that sensor or something else went crazy. I suddenly did 2.5+ 360 degree turns as the right track remained in full power even though the joystick was moved to every other possible position. This is a fly-by-wire electronic controlled hydraulic system on this machine. Once I was able to get the machine back under control, it never pulled the donut stunt again but tracking was off. Scanning through the outputs on the computer screen showed no rpms on the right track when going forward. Next morning, checking the issues again and now NO rpm's showing in either forward or reverse on the right track motor. I DO NOT want to be loading, unloading or working extreme terrain and having this sudden "donut issue" happening again.
I'm working on trying to get this issue resolved so that I can put this machine to work and get an income with it. Several times, prior to the sensor going out, it acted as if something was caught in the tracks or the parking brake had come on as one track would lock up temporarily, just 1 or 2 seconds. No blockages were found and the issue was just part of or the learning of this new-to-me machine. Track frames were recently removed for frame updates and wiring to the travel motors was inspected and wrapped with fresh protective covers as were the hydraulic lines. No issues were evident on any of the wiring at that time and they were inspected due to the previous sensor problem.
If anyone else has experience with these machines, please give me some ideas as to what to look for. I did change out the final drive oils to inspect those for problems. Maybe 1/8" of extremely fine metal dust on the plug magnets but no other chunks or problems evident on either side. The right side did have more pressure build up that the left and possibly more fluid but hard to say exactly due to differences in drain plug positions when I opened the plugs. I warmed up the finals prior to changing the oil and replaced with a synthetic Mobil 220 SHC. Now, waiting for the factory engineers to help me with this via the laptop and internet, again. The $600 sensor was their last fix and that did not solve the problem.
After conferring with the factory engineers via the internet and remote computer diagnostics, I replaced the $600 Rexroth hall effect speed sensor and that solved the problem, temporarily. After 6 hours of use with the new sensor, that sensor or something else went crazy. I suddenly did 2.5+ 360 degree turns as the right track remained in full power even though the joystick was moved to every other possible position. This is a fly-by-wire electronic controlled hydraulic system on this machine. Once I was able to get the machine back under control, it never pulled the donut stunt again but tracking was off. Scanning through the outputs on the computer screen showed no rpms on the right track when going forward. Next morning, checking the issues again and now NO rpm's showing in either forward or reverse on the right track motor. I DO NOT want to be loading, unloading or working extreme terrain and having this sudden "donut issue" happening again.
I'm working on trying to get this issue resolved so that I can put this machine to work and get an income with it. Several times, prior to the sensor going out, it acted as if something was caught in the tracks or the parking brake had come on as one track would lock up temporarily, just 1 or 2 seconds. No blockages were found and the issue was just part of or the learning of this new-to-me machine. Track frames were recently removed for frame updates and wiring to the travel motors was inspected and wrapped with fresh protective covers as were the hydraulic lines. No issues were evident on any of the wiring at that time and they were inspected due to the previous sensor problem.
If anyone else has experience with these machines, please give me some ideas as to what to look for. I did change out the final drive oils to inspect those for problems. Maybe 1/8" of extremely fine metal dust on the plug magnets but no other chunks or problems evident on either side. The right side did have more pressure build up that the left and possibly more fluid but hard to say exactly due to differences in drain plug positions when I opened the plugs. I warmed up the finals prior to changing the oil and replaced with a synthetic Mobil 220 SHC. Now, waiting for the factory engineers to help me with this via the laptop and internet, again. The $600 sensor was their last fix and that did not solve the problem.