my servo its overheating ...its for this type of oil ???
Can we stay on one thread please, it's all for the same machine and the same problem .........!!!
Engine oil does not have the additive package required to work with transmission clutches. If you have an Operation & Maintenance Manual for the machine at your operation you will note that
ONLY oils meeting TO-4 specification should be used in the powershift transmission. engine oil does not meet that specification. Using the correct oil will also prolong the life of your transmission, a failure will cost you a lot of money and downtime as well. Of course as the owner you are perfectly entitled to use any oil that you want to, but if you do use an oil that is not recommended then please don't complain that your machine has problems.
You're asking for help with a problem. We first need to rule out everything that
MIGHT be causing your problem in order to get to the root cause of the problem, and using engine oil in the transmission as you are right now is is one of those issues that needs correcting. First get the correct oil in it and we can eliminate the oil as a potential source of the problem.
You have answered a lot of my initial questions, and the
key thing is that the loader has had this problem since it arrived at your operation. But I still need answers to the following: -
1. Have you done a torque converter stall test..? What RPM does the engine hold at TC stall in 4th speed forward..? That will give an idea of your torque converter efficiency.
2. I would like the engine fan speed checked, just to rule out if there may be a heat exchange issue within the transmission oil cooler. If you have nothing on your site to check fan speed then at least check the temperature at the coolant inlet hose of the radiator (when the machine is "overheating" the transmission) and then do the same at the radiator outlet hose. How many degrees difference do you have ..? If the radiator is not functioning correctly for whatever reason (it could be dirty - have you checked it and maybe cleaned it just to be sure?) then the coolant returning to the transmission oil cooler will be hotter than it should be. That means it cannot lower the temperature of the transmission oil as much as it should. So as a result the transmission oil slowly overheats during operation until it generates the alarm. In that case the problem would not be in the transmnission but in the engine cooling system performance, the transmission oil temperature alarm would be the symptom not the root cause.
3. The reason I asked about the torque converter Part Number is that there are 2 Part Numbers of converter for this machine. One has a free-wheel stator and is recommended for load & carry operations, the other has a fixed stator. What type of operation are you doing, loading trucks, loading a conveyor system, moving material from once place to another (load & carry), etc ..? If you are doing load & carry how many metres are you moving the material and is the ground flat of inclined..? Knowing what type of operation you have will help to find a solution for your issue.