Case CX80 - Replacing the Hydraulic Fluid; Bleeding Air from the Hydraulic Components

CHAPTER 5 - LUBRICATION, FILTERS, AND FLUIDS
5-39
6-34551NA Issued 8-04 Bur
REPLACING THE HYDRAULIC FLUID
1. Release all pressure in the hydraulic reservoir.
See Releasing Pressure in the Hydraulic
System.
2. Using a pump, remove the fluid from the
hydraulic reservoir. Have a container with a
suitable capacity ready.
CX75SR, CX80
1. Remove the reservoir filling cover (1).
2. To access the cover, see Accessing the hydraulic
reservoir.
3. Remove the drain plug (2) to remove the
remaining fluid from the reservoir.
CT02D103
Figure 107
CX135SR
1. Remove the reservoir filling cover (1).
2. To access the cover, remove the screws and the
upper plate.
CT02D073
Figure 108
3. Remove the drain plug (2) to remove the
remaining fluid from the reservoir.
CT02D104
Figure 109
Replace the inlet filter and the return filter. See
Cleaning and replacement of the inlet filter and
Return filter replacement.
Install the reservoir drain plug.
Put new hydraulic fluid into the reservoir. See Filling
the reservoir.
Install the reservoir cover plate and seal.
IMPORTANT: Before you start the engine, it is very
important that you bleed air from all the hydraulic
components. See Bleeding Air from the Hydraulic
Components.
Start and run the engine with no load for
approximately five minutes.
Move each control several times to remove any air in
the system.
Swing the upperstructure evenly left to right two
complete turns or more.
Place the machine in position and then stop the
engine.
Check the oil level in the hydraulic reservoir and add
oil as required and check that there are no air
bubbles in the hydraulic reservoir.
Bleed the components, see Bleeding the hydraulic
components.
BLEEDING AIR FROM THE HYDRAULIC
COMPONENTS
IMPORTANT: After bleeding air from the
components, stop the engine for five minutes and
check there are no bubbles at the surface of the
hydraulic fluid in the reservoir.
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