Posted by charles todd on April 08, 2008 at 12:48:08 from (205.242.95.136):
I put a Vickers hydraulic gauge on a Pioneer male qiuck-connect coupling and placed it in all four remotes. I got 1100-psi at low idle and 1400-psi at high idle. The relief valve would squeal at these psi's at these RPMS... If the relief is 1600-psi, these pump readings are low, shouldn't I get 1600-psi. Would a 45 year old pump be failing, has over 12,000 hours. What about the relief, can I put a 1800-psi or 2000-psi Industrial tractor relief in... I would like to go to a 17-gpm pump if replacement is wise, besides, I can get a 17-gpm cheaper than a 12-gpm. Any drawbacks to the 17-gpm?
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