Komatsu PC450-8, Руководство по эксплуатации и техническому обслуживанию

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MAINTENANCE
MAINTENANCE PROCEDURE
4-39
ADJUST BUCKET CLEARANCE 4
WARNING
It is dangerous if the work equipment is mistakenly moved
when adjusting the bucket clearance.
Set the work equipment in a stable condition, stop the
engine, then set safety lock lever securely to the LOCK
position (L).
1. Set the work equipment in the position shown in the dia-
gram on the right, then stop the engine and set the lock
lever to the LOCK position (L).
2. Shift O-ring (1) and measure the amount of play “a“.
Measurement is easier if you move the bucket to one side
so that all the play can be measured at one place (the right
side in the diagram).
Use a clearance gauge for easy and accurate measure-
ment.
3. Loosen 4 plate mounting bolts (2), and loosen plate (3).
The shim is a split type, so the operation can be carried out
without removing the bolts.
4. Remove shim (4) corresponding to the amount of play “a“
measured above.
[Example]
In the case of play of 3 mm, remove two 1.0 mm shims and
one 0.5 mm shim. Play becomes 0.5 mm. For shim (4), two
types of 1.0 mm and 0.5 mm are used.
When play “a“ is smaller than one shim, do not carry out
any maintenance.
5. Tighten the four bolts (2).
If the bolts (2) are too stiff to tighten, pull out pin stopper
bolt (5) for easier tightening.
(6)
(7) Arm
Bucket