Replacing The Hydraulic Fluid; Bleeding Air From The Hydraulic Components - Case CX75SR Operator's Manual

REPLACING THE HYDRAULIC FLUID

1. Release all pressure in the hydraulic reservoir.
See Rel easing Pres sur e 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.
1
CT02D103
CX135SR
1. Remove the reservoir filling cover (1).
2. To access the cover, remove the screws and the
upper plate.
CT02D073
3. Remove the drain plug (2) to remove the
remaining fluid from the reservoir.
6-34551NA
CHAPTER 5 - LUBRICATION, FILTERS, AND FLUIDS
2
Figure 107
Figure 108
Issued 8-04 Bur
CT02D104
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.
S t a r t a n d r u n t h e e n g i n e w i t h n o l o a d fo r
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
components, stop the engine for five minutes and
check there are no bubbles at the surface of the
hydraulic fluid in the reservoir.
2
Figure 109
bleeding air from
5-39
the