I checked the hyd pressure cause i was having issues lifting 300 lbs of weight with the fel. I was at 1450psi. Ordered shims for the pressure relief valve. I ended up putting in 3 of the 4's 2 2's and 2 of the 1's. I put the 4's in first rechecked. And so on and so on. End result only 1550 to 1600 psi. One time it jumped to 1950 to 2000, but quickly came way back down to 1500 range. Do i have something else that needs adjusted or is sticking? Im lost as to what to do next. Thanks in advance.