It does, that first illustration showing you to measure and adjust oil pressure. So it appears you have the pressure reducing valve on a manifold with 2 solenoids. That makes sense since your isolating 2 pumps. You want to make sure your pilot oil , measured at P3 is correct. If it's low, you will have reduced travel to each spool since the pressure, even fully stroked, will be insufficient to fully stroke the spool.
Typically most machines run 450 to 475 psi. Or if you use bar between 30 and 33. Once you verify you have correct pilot oil pressure, you need to make sure that pressure is making it to the RCVs. So, you have 2 solenoids. Assuming 1 for blade and swing, and the other for digging/travel. Since all functions are weak, we have to look at voltage and ground to the solenoids. We're looking for common denominators. What effects both? If you have the fitting, you'll want to measure the pressure out at the pilot pressure manifold with the armrest up and down. Should be less than 1 bar up and should be same as P3 when down. If pressure is low, measure voltage at solenoids... While the solenoid is plugged in. It's important to measure under load. Unloaded you may have battery voltage but under load, it may drop to 1 volt, you won't know till you verify.