Edition 2 Chapter 1 Page 1-25
Feb/2013 Maintenance and Service
(g) Screw down the plug fitted on the brake disc to drain the hydraulic
oil in brake return lines every 6 months.
(2) Flush the expired (initial) oil out of the system as follows:
The function of this procedure is to remove all the initial oil out of the system.
(a) Start the engine and operate it at a low speed.
(b) Start the hydraulic system pump.
(c) Operate all the hydraulically controlled functions.
• Make sure that you fully move the items through the full travel of
operation.
• Make sure that you add new oil into the tank as the expired oil
flows out.
• Do not let the initial oil go back into to the oil tank.
• Do not stop the system pump until the new oil flows out of the
master oil return pipe.
(3) Connect master oil return pipe to the oil tank. Move all the hydraulically
controlled functions through the full travel and monitor the level of oil in
the tank. If necessary, add oil.
(4) You must monitor (interval set by management) the quality of the oil.
Change the oil when the number of particles is greater than the number in
the chart.
Change the oil when:
Particle Size Number of particles / ounce (milliliter)