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4.12.5
INSPECTION AND ADJUSTMENT OF BUCKET GAP ADJUSTMENT
MECHANISM
• When adjusting bucket gaps, pull up the pilot control shut-off lever to the "LOCKED" position and stop the
engine.
• If the bucket gaps are not properly adjusted, galling is generated in the contact surface between the bucket and
the arm causing abnormal noise and damage on the shaft the O-ring.
Bucket gap
adjustment mechanism
1.
Place the bucket as shown in the figure in stable
condition.
Bucket boss
2.
Move O-ring (1) from the specified position to the
bucket boss.
3.
Swing the upper structure right very slightly to press
the tip of the arm to the right of the bucket lightly (the
side without the gap adjustment system).
4.
Move the pilot control shut-off lever to the
"LOCKED" position, and then stop the engine.
i
A
j
1
2
3
5.
Measure gap (A) between the bucket and the arm
boss.
When the measurement value is 1.0 mm or more,
adjust it.
6.
Loosen each bolt, and remove appropriate number
of shims to adjust the gap.
There are 5 pieces of shims (3) (1 mm) in average in
3 bolts (2) on the gap adjustment part.
7.
Tighten bolts (2) with the specified tightening torque
evenly.
Tightening Torque: 181±20N·m(133±15lbf·ft)
8.
Fit O-ring (1) in place.
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