I have a late 90's t190 bobcat. My problem started out with the traction light coming on and going off. When on would operate fine when off it would set the brake. With some maneuvering the light would come back on and free brakes. Now the left side brake is locking up to the point that you cant even move the machine but the right side moves even with the parking brake set. Noticed the seal between the left side drive unit and brake assembly was leaking. Tore it down and replaced seals nothing apparent wrong with the brakes when i had it apart. I put it back together and the brake is still locking up. I have no pressure to the right side brake assembly. I now have it at the bobcat dealer and they tell me I need two new drive assemblies. This sounds a little wierd to me. I know there is a brake valve. Isn't it posible that the valve could be the problem. Bobcat says they wont be able to tell until the install the new motors. This just seems like the are trying to stick new parts on until the find out what it is. Any suggestions.