Greetings, I'm a new here and was hoping someone could help me out with a question. I have found an asv rc100 with a loftness timber ax for sale that I plan on buying. Everything checks out and seems to run smoothly, but I could not tell if the high flow hydraulics were working properly. I lifted the timber ax about a foot off the ground and turned on the high flow hydraulics and revved the motor to nearly full throttle. The hydraulic pressure gauge on the timber ax had a reading of about 500 psi, while the gauge goes up to 5000. It was not under any load in terms of cutting and the blades spun freely with good balance. Does the psi increase under load or is there not enough flow? Admittedly, I could not read the hydraulic fluid level on the side of the machine. It was either full or empty as I could not see a line or bubble. Any help would be greatly appreciated. Thank you in advance.