I have a 810 power plow ph1. Last snow we had, all of a sudden the plow did not want to raise. I could hear the motor running, but wouldn’t come off of the ground. All other functions worked fine. After a few seconds, the plow raised like nothing was wrong. Didn’t have a problem with it the rest of the day. The following morning went to leave, same thing. Played with it for a few seconds, and again raised like nothing was wrong and was fine. Then I went to remove plow to service the truck, the power hitch started acting up. It dropped the plow to the ground fine, but would not release the hook from the undercarriage. After about five minutes it started working fine and dropped the arm the rest of the way. Other than some hoses a motor and pump, I have never had issues with this plow. Now this is a 11 year old plow and has seen her better days. The fluid was also where it should be. Any help would be greatly appreciated, also I’m having a hard time finding internal parts such as valves and coils. Thanks again for any help or advice.