paulhead
Active member
Been having an issue with air in my hydro assist system. 94 YJ, 4.0, 1.75 PSC ram and PSC pump. 25oz baffled vented reservoir. Bled the system a ton. Drove it around town no problems. As soon as I took it wheeling it starting whining after the second trail. Got home , redid some of the hoses, drove it around town, fine. As soon as I hit the trails again the whining comes back. I've been messing with the system til I'm blue in the face. Yes the feed hoses are short and above the pump. Figured maybe the reservoir isn't baffled right so I opted to try the PSC. Then I come across this video which gives me a new perspective. And I understand the PSC reservoir is slightly pressurized with the additional vent. Could that be the issue?
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