Testing And Adjusting Steering Oil Pressure - Komatsu WA250-6 Shop Manual

SEN03837-01
Testing and adjusting steering oil
pressure
Necessary tools
Symbol Part No.
799-101-5002
P
790-261-1204
a Measuring condition
Hydraulic oil temperature:45 – 55°C
q
Engine speed: High idle
q
Measuring main relief pressure
1. Fit frame lock bar (1) to the frame.
2. Remove oil pressure pickup plug (2) of the
steering cylinder circuit.
12
30-120
Part Name
Analog type hydraulic tester
Digital type hydraulic tester

Testing and adjusting steering oil pressure

3. Fit a nipple P [3] to the steering circuit pressure
measurement plug hole, then install oil pres-
1
sure gauge P [1], P [2] (40 MPa {400 kg/cm
4. Start the engine, run the engine at high idle,
then turn the steering wheel to the left or right
and measure the pressure when the relief
valve is actuated.
120 Testing and adjusting, Part 2
WA250, 250PZ-6
}).
2