Testing And Adjusting Steering Wheel - Komatsu WA250-6 Shop Manual

SEN03837-01
Testing and adjusting steering
wheel
Necessary tools
Symbol Part No.
N 79A-264-0021
Measuring play of steering wheel
a Measurement conditions
Engine speed: Stopped
q
Machine posture: Facing straight forward
q
1. Move the steering wheel (1) 2 or 3 times lightly
to the left and right, check that the steering
mechanism is at the neutral position, then
make mark (A) on the outside frame of the
machine monitor.
2. Turn the steering wheel to the right, and make
mark (B) at the position where the operating
effort starts to become heavy.
3. Turn the steering wheel to the left in the oppo-
site direction from Step 2, and make a mark at
the point where the operating effort becomes
heavy (when the steering valve lever starts to
move). Then measure the distance in a
straight line between marks (B) and (C).
10
30-120
1
Part Name
Push-pull scale
120 Testing and adjusting, Part 2

Testing and adjusting steering wheel

Measuring operating force of steering wheel
a Measurement conditions
Road surface:
q
Flat, horizontal, dry paved surface
Engine coolant temperature:
q
Within green range on engine coolant
temperature gauge
Hydraulic oil temperature:
q
45 – 55°C
Tire inflation pressure:
q
Specified pressure
Engine speed:
q
Low idle (bucket empty)
1. Install push-pull scale N to the steering wheel
knob (2).
2. Start the engine.
a After starting the engine, raise the bucket
approx. 400 mm and remove the frame
lock bar.
3. Pull push-pull scale N in the tangential direc-
tion and measure the value when the steering
wheel moves smoothly.
a Do not use the value when the steering
wheel starts to move.
4. After finishing the work, remove the measuring
instruments and return the removed parts.
WA250, 250PZ-6