I have been having problems with my Kiwa Excel center-4 throwing a servo 34 alarm. Now if you look up this alarm it says the z encoder cable is disconnected. I took off the 10m dc servo motor and took off the back of the motor where the encoder is. I also removed the ring that holds the brushes. I turned the motor on its side and about a half a cup of oil ran out. The motor sits vertically on the machine so I never expected that much oil to come out. Is there a seal in the front of this motor? Do I need to completely dissamble this and replace a seal in the front of the motor? Thanks Dan.