Hooked the pressure hose to the BY port and BY hose to the pressure port. Stated engine and pulled the lever and accelerated engine and hear a whistle/whine sound and realized the hose were mixed up. I replaced the pump and relief valve in loader valve. Still it is very weak and have to accelerate engine to even move the loader. What else can I check? Is the three point lift plumbed into this valve with a steel line going back to the side of the transmission where the shifter goes in?