STEERING
M6060, M7060, WSM
6-S4
4. CHECKING, DISASSEMBLING AND SERVICING
[1] CHECKING AND ADJUSTING
(1) Steering Controller
Relief Valve Setting Pressure
1. Disconnect one of the delivery hose 1 from steering cylinder and
set a pressure gauge (3) (Code No. 07916-50321) between
them using power steering adaptor (1) (Code No.
07916-54021), joint (Code No. 07916-50401) and cable (Code
No. 07916-50331).
2. Start the engine and fully turn the steering wheel to the left or
right and read the pressure when the relief valve operates both
idling and maximum engine speed.
3. If the measurement is not within the factory specifications,
adjust the relief pressure by the adjust plug (4).
(Air Bleeding)
• Start the engine, then turn the steering wheel slowly in both
directions all the way alternately a few times, and stop the
engine.
(Reference)
• One full turn of the set screw changes the relief setting pressure
by approx. 2.9 MPa (30 kgf/cm
2
, 427 psi).
Condition
• Oil temperature : 50 to 60 °C (122 to 140 °F)
9Y1210828STS0004US0
(2) Hydraulic Pump
Hydraulic Flow Test
• See page 7-S5.
9Y1210828STS0005US0
Relief valve setting
pressure
Factory
specifi-
cation
At idling
engine
speed
Above
12.3 MPa
125 kgf/cm
2
1780 psi
At
maximum
engine
speed
Below
18.6 MPa
190 kgf/cm
2
2700 psi
(1) Power Steering Adaptor
(2) Cable
(3) Pressure Gauge
(4) Adjust Plug for Relief Valve
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