New Holland L180 Repair Manual page 50

DISTRIBUTION SYSTEMS ­ PRIMARY HYDRAULIC POWER SYSTEM
PRIMARY HYDRAULIC POWER SYSTEM ­ Decontaminating
1. Start and run the engine at 1500 rpm (r/min).
2. Completely retract the all attachment cylinders on the
machine. Stop the engine.
WARNING
If retracting the cylinder rods causes the attachment
to be raised, block the attachment in place before pro­
ceeding to the next step. 39­4
3. Move each control lever in both directions to release
pressure in the hydraulic circuits.
4. Loosen and remove the filler cap from the reservoir.
5. Drain the hydraulic oil from the reservoir.
(A) Have available acceptable equipment to drain the
hydraulic oil.
(B) Remove the drain plug from the bottom of the
reservoir.
6. Remove the hydraulic filter elementsfrom the ma­
chine.
7. Install new hydraulic filter elementson the machine.
8. Install the drain plug in the bottom of the reservoir.
9. Fill the hydraulic reservoir.
(A.10.A)
10. Disconnect the line from the OPEN end and
CLOSED end of each cylinder.
11. Be sure all control levers are in the NEUTRAL posi­
tion.
12. Start and run the engine at low idle.
IMPORTANT: Check the oil level in the hydraulic reservoir
frequently while doing step 13. Have another person hold
a container under the hydraulic lines while you do step 13.
13. Slowly move the control lever for each bucket and
lift cylinders in both directions until oil begins to flow
from the open line. Hold the control lever in place
until clean oil flows from the open line.
14. Stop the engine.
15. Connect the system line to the CLOSED end of each
cylinder.
16. Connect a suitable drain line to the OPEN end of
each cylinder and place the other end in an accept­
able container for contaminated oil.
17. Start the engine and run the engine at low idle.
18. Slowly and completely extend all cylinders. As the
piston rod comes in/out of the cylinder, oil will be
pushed out of the OPEN end of the cylinders.
IMPORTANT: Any attachment or part of an attachment that
is raised must be supported with acceptable equipment to
prevent the attachment from falling.
Reservoir ­ Filling
87630288 1 6/6/2007
A.10.A / 31