5-38
5
BUCKET
TROUBLESHOOTING
Spontaneous drop of the bucket is too large
1
Is the spontaneous drop
of the bucket cylinder
within specs?
W
ithin specs
Normal
Out-of-specs
2
Check
the bucket cylin-
der
Faulty
Repair
or replace the bucket
cylinder
Normal
Oil
is leaking inside the control
valve
Replace the housing block
1. Is the spontaneous drop of the bucket cylinder
within specs?
“2. Service data, Performance criteria”
2. Check the bucket cylinder
a. Fully extend the bucket cylinder, completely re-
tract
the arm cylinder, and lower the bucket to the
ground.
b. Disconnect the two hoses connected to the cylin-
der
. Insert plugs (1) into the disconnected hoses and
the piping.
c.
Raise the boom and lift the hoe attachment off the
ground. If the bucket drops, the cylinder is faulty. If
not, there is a leak inside the control valve.
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