Removal and Replacement
Removal
!
DANGER
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
1 Park the machine on level ground, engage the parking
brake and set the transmission to neutral. Lower the
attachments to the ground. Stop the engine and
remove the starter key.
2 Turn the steering wheel to the left and to the right
several times to vent system pressure.
3 Disconnect and cap all hydraulic hoses from the
steering unit as shown at A. Label the hoses to ensure
correct refitting.
4 Get an assistant to hold the steering unit, and, working
inside the cab, loosen and remove 4 bolts B. Lift the
steering unit from the machine.
Replacement
!
WARNING
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
1 Replacement is a reversal of the removal sequence.
Make sure that the hoses are correctly installed.
2 Bleed the steering system. Refer to Service
Procedures, Steering System - Bleeding.
3 If a new steering unit has been fitted then the system
relief valve must be tested for correct pressure setting.
Refer to Service Procedures, Steering System -
Pressure Testing.
Note: All hydraulic adapters that are installed together with a
bonded sealing washer must also have JCB Threadseal
applied to the threads of the adapter.
50 - 1
Section H Steering
9803/3280
Section H
50 - 1
Issue 1
Hydraulic Steer Unit
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