Komatsu GD555-5 Operation & Maintenance Manual page 202

OPERATION OPERATION
10. If the digging is comparatively heavy duty, angle the wheels
towards the slope face.
11. If the digging is comparatively light duty, angle the wheels
away from the slope face.
Discharge the soil from the slope face to the outside of the rear
wheels.
REMARK
The procedure in the diagram is for the right side. For the left side,
set the blade in the opposite position.
SHOULDER REACH METHOD - RIGHT SIDE
Set to the shoulder reach posture and carry out operations.
For details, see "SHOULDER REACH POSTURE (RIGHT SIDE) (PAGE 3-160)".
OPERATION OPERATION
3 - 149