Operation and maintenance manual

Section 220-0000
Steering System - Steering System Schematic
SM 1390 Rev 2 2-02
4
Hydraulic Oil
The steering system should be kept filled with
hydraulic oil as specified in Section 300-0020,
LUBRICATION SYSTEM.
SERVICE TOOLS
It is recommended that the following tools are used
when carrying out pressure or temperature checks
during maintenance procedures. These tools, along
with other general service tools, are available from your
dealer. Refer to Section 300-0070, SERVICE TOOLS,
for part numbers of these tools.
Multi-gauge
The multi-gauge is basically four pressure gauges in
one. Continuous system pressure readings are
indicated on one of three simultaneously reading
gauges through a pressure range of 762 mm (30 in) of
vacuum to 345 bar (5 000 lbf/in
2
).
Non-contact Infrared Thermometer
The infrared thermometer can be used to spot heat
problems early in electrical, mechanical and hydraulic
systems. Hand held and easy to use, you simply aim,
pull the trigger, and read the temperature. Since there
is no need to touch what you are measuring,
temperatures of hard-to-reach or moving components
can be taken without getting burned or shocked.
below the pump suction line to prevent air entering the
system.
2. Remove wheel blocks from all road wheels, start the
engine and let it idle. Add oil to the hydraulic tank as
required. When the hydraulic tank is filled to the
maximum level and oil is clear proceed as follows:
a. Turn the steering wheel from lock to lock to bleed
the air in the steering cylinders and lines.
Note: Immediately upon valve spool actuation oil must
be added to the hydraulic tank to replenish the oil
moving into the circuit.
WARNING
Do not operate the vehicle until all air is bled
from the oil.
b. When the oil in the hydraulic tank is clear (not
cloudy or creamy) the system is free of air.
Note: Slight creep or drift of the steering wheel is
normal.
c. Fill hydraulic tank to the recommended level and
install the filler cap.