Operation and maintenance manual

Section 220-0090
Steering System - Steering Valve
SM 1391 5-98
6
Note: Slight creep or drift of the steering wheel is
normal.
c. Fill hydraulic tank to the recommended level and
install the filler cap.
Hydraulic Oil
The steering system should be kept filled with
hydraulic oil as specified in Section 300-0020,
LUBRICATION SYSTEM.
SPECIAL TOOLS
Special tools required for assembly of the steering
valve, are shown in Figs. 7 & 8. Refer to Section
300-0070, SERVICE TOOLS, for part numbers of
these tools and general service tools required. These
tools are available from your dealer.
3. Tighten bolt (5), washer (16), nut (17) and coupling
(12) onto steering column (3). Slide bellows (2) down
over steering column (3) and tuck lower lip under cab
floor plate.
4. Connect all hydraulic lines to steering valve (1) as
tagged at removal.
5. Fill hydraulic tank with hydraulic oil, as specified in
Section 300-0020, LUBRICATION SYSTEM. Refer to
'Filling and Bleeding The Steering System'.
6. Remove wheel blocks from all road wheels, place
the battery master switch in the 'On' position, start the
engine and operate the steering system. Check
hydraulic lines and steering valve (1) for leaks. Tighten
lines and fittings as required.
7. Secure access cover to cab floor plate with
mounting hardware and install floor mat in position.
FILLING AND BLEEDING THE STEERING
SYSTEM
1. Fill hydraulic tank to maximum level. Be ready to
add oil when the engine is started. Do not let oil drop
below the pump suction line to prevent air entering the
system.
2. Remove wheel blocks from all road wheels, start up
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 oil in the hydraulic tank is clear (not cloudy or
creamy) the system is free of air.
SM - 540
Fig. 7 - 'O' Ring and Kin Ring Assembly Tool
SM - 541
Fig. 8 - Driveshaft Mounting Fork