I just recently got a Omc series 1000 . This machine has no parking brake system and I will be using it on uphill grades to maintain a dirt road and driveway. The machine if the engine should quit or hydraulic pump fails would free wheel the machine. I am trying to figure a system for either a parking brake or possibly putting in a back up 12 volt hydraulic system. With the back up system I was thinking of teeing off the main hydraulic lines and putting a check valve in the 12 volt system lines. Then of course putting a switch in the operating area. Any ideas or comments about either ? Just do not feel like going for a ride down hill with no way of stopping the machine The ride may be fun , but the sudden stop at the end probably will not be good.