Hydraulic filter and oil change
I am looking for some information on draining the hydraulic oil from the cooling fan/steering system. I have drained the oil from the hydraulic reservoir, but I want to drain more oil from the system. I see a large 2 1/4" hose on the bottom of the Hyd. Reservoir which is connected to the pump. I assume this is the feed hose for fluid to the pump. Could I disconnect this hose and drain the oil, then refill the system without causing damage to the pump. I am unsure if Air or fluid not filling up the pump would cause damage upon starting the engine? If this were possible I sure don't want to have to bleed the air out of the system. I have the 3 new Nelson filters and fluid ready to go but I am hesitant about draining the rest of the fluid. Any help is appreciated. Thx
2002 Newmar Mountain Aire, Spartan Chasis ISL 370 HP, Toad: 2004 Jeep Grand Cherokee Limited.