Extracted from the US version of the bulletin:CAUSE:
Machine deformation may cause uncontrollable ITB steering, since the ITB is always moving slightly from
front to rear rocking back and forth, and may not be to move back into a controllable range when it moves
out of control range because of the machine deformed.
SC 471-0X may occur if there is a gap between the Leveling Shoe and the Leveling Bolt, even though the
machine is leveled within the reference value (+/- 5mm per 1,000mm).
SOLUTION:
Procedure to check:
Make sure the following, after completion of leveling of the entire system (Refer to “Height and Level
Adjustment” of Common Adjustments in the Service Manual).
1. Check each of the Leveling Shoes [A] by hand for stability and if it can be moved.
2. Adjust the Leveling Bolt [B] to ensure it stops flush against the Leveling Shoe [A] completely without an
air gap. If an air gap exists the Leveling Shoe may move.
Bookmarks