I have a 2002 Nissan 140. The power trim pressure leaks down after a period of time. I can bleed the system as per the owners manual and it works. I don't know how long it takes for the system to bleed down. For example, I bled the system and it worked, I came back three weeks later and it was not working so I am not sure how quick this occurs. There are not any fluid leaks that I have seen. Any ideas on a solution or where to start trouble shooting?
