Method For Adjusting Shims At Center Ball - Komatsu D61EX-24 Operation & Maintenance Manual

MAINTENANCE

METHOD FOR ADJUSTING SHIMS AT CENTER BALL

Place the work equipment lock lever at LOCK position except when operating the blade for adjustment.
The shim adjustment of the center ball portion is required in the following cases.
• When a play is found at the center ball portion
• When the blade is assembled again after it has been removed for transportation
If it is not adjusted, the blade response to the operation becomes worse, and soil and sand enter and cause
premature wear or damage of the ball.
Adjust as follows.
• Correct value for play at ball joint: 0.2 to 0.7 mm {0.008 to 0.047 in}
• Standard shim thickness: 6 to 8 mm {0.236 to 0.315 in}
1.
Remove bolt (1) and loosen bolt (2).
2.
Remove excess shims (3) (1 to 2 pieces), and tighten bolts
(1) and (2) lightly.
3.
Angle and tilt the blade to check the play at center ball por-
tion.
• When no creak sound is heard and the blade moves
smoothly, the adjustment is completed.
• If a creak sound is heard or the blade does not move
smoothly, add shims.
Shim thickness to use: 0.5 mm {0.02 in} , 1.0 mm
{0.039 in}
• If the play at the ball portion still large, remove more
shims.
4.
After adjusting, tighten bolts (1) and (2).
Tightening torque: 588 to 1030 Nm {60 to 105 kgm, 434 to
759 lbft}
k k
WARNING
MAINTENANCE PROCEDURE
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