5 - 1
Section 3 Routine Maintenance
9803/6020
Section 3
5 - 1
Issue 1
Hydraulics
Air Bleeding Procedures
!!
WARNING
Hydraulic Pressure
Hydraulic fluid at system pressure can injure you. Before
disconnecting or connecting hydraulic hoses, stop the
engine and operate the controls to release pressure
trapped in the hoses. Make sure the engine cannot be
started while the hoses are open.
INT-3-1-11/1
! WARNING
Hydraulic Fluid
Fine jets of hydraulic fluid at high pressure can
penetrate the skin. Do not use your fingers to check for
hydraulic fluid leaks. Do not put your face close to
suspected leaks. Hold a piece of cardboard close to
suspected leaks and then inspect the cardboard for
signs of hydraulic fluid. If hydraulic fluid penetrates your
skin get medical help immediately.
INT-3-1-10/1
Checking the Fluid Level
1 Prepare the Machine
Position the machine on level ground with the bucket
and dipper rams fully extended and the boom lowered
to rest the attachment on the ground, as at A.
2 Check the Level
Look at the fluid level in the sight tube B. The level
should be between the two marks on the tube. If the
fluid is cloudy, water or air has entered the system.
Water or air in the system could damage the hydraulic
pump.
Releasing Tank Pressure
! WARNING
DO NOT remove the hydraulic tank filler cap or cover
plate when the engine is running. The hydraulic system
is under pressure. You or others could be injured. First
stop the engine and then release the pressure.
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1 Prepare the Machine
Position the machine on level ground. Stop the engine.
Remove the starter key.
2 Locate Breather C on Top of the Hydraulic Oil Tank
3 Release Tank Pressure
Remove cap D. Press and hold the projection revealed
until all pressure has been released.
C
E
D
B
A
Topping-up Fluid Level
1 Prepare the Machine
Position the machine on level ground. Stop the engine.
Remove the starter key.
2 Release Tank Pressure
See Releasing Tank Pressure.
3 Add Fluid
Remove the hydraulic tank filler port cover E and add
fluid to the required level as indicated on the sight tube
B. See Fluids and Lubricants - Capacities and
Specifications for type of fluid to use.
4 Refit filler port cover E.
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