FLUSHING THE HYDRAULIC SYSTEM 2.7 For flushing water from the hydraulic system, perform the following procedures: Reservoir drain plug IMPORTANT 2 Be sure attachments are removed and liftarm are in the lowered position. 1 Remove any attachment. 2 Make sure all cylinders are fully retracted. 3 Change the hydraulic fluid. (fig. C4446) 4 Change the hydraulic filter. (fig. C1472) 5 Disconnect the hydraulic lines from one set of cylin- ders. (fig. C4251, C1336) 6 Start the engine and set to the lowest idle. C4446 Replace hydraulic filter WARNING Use caution when dealing with hydraulic fluid under pressure. Escaping fluid under pressure can pene- trate the skin and cause serious injury.
7 Have someone hold the open hydraulic lines into a container. Stroke the foot pedals, or hand operated, con- trols slowly. Continue to repeat this cycle until the oil comes out clear. Repeat for opposite set of cylinders. C1472 IMPORTANT Check the hydraulic oil frequently during this pro- cedure. Replenish as required. Disconnect hydraulic lines 8 Attach a hose and couplings to the auxiliary circuit. Engage the auxiliary hydraulics, forward and reverse, until the oil flows clear. 9 Connect 1 hose each, on each cylinder, to the fixed end of the cylinder barrel. 10 Move the foot pedal or control lever to extend the cylinder rods. This will flush the oil from inside the cylin- der barrels.
Be prepared to contain the waste oil. 11 Stop the engine. 12 Connect the hydraulic hoses to the rod end of the cylinder barrel. 13 Replenish the hydraulic oil as required. C4251 IMPORTANT Please contain and dispose of waste oil in an envi- ronmentally friendly manner. C1336 2-14 Disconnect hydraulic lines