1
Check the operation of
actuators other than of
the bucket cylinder
Normal
2 Check the pilot valve
Faulty
Repair or replace the pilot
valve
Normal
ī
Check the spool opera-
tion
Faulty
īµīīīīīīīīīīīīīīīīīīīīīīīīīīīīī
block
Normal
4
ī·īīīīī
īīīīīīīīīīīīīīīīīīīīī
relief valve
ī³īīī
īīīīīīīīīī
The port relief valve is
faulty
Repair or replace the port re-
lief valve
ī±īīīīīīīī
5
Check the bucket cylin-
der.
Faulty
Repair or replace the bucket
cylinder
1. Check the operation of actuators other than of the
bucket cylinder
Determine if only the bucket cylinder is faulty by check-
īīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīī
īīīīīīī
īīīīīīīīīīīīīīīīīī¬īīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīī
īīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīī
īīīīīī·īīīī
īīīīīīīīīīīīī²īīīīīīīīīīīīīīīīī¤īīīīīīīīīīī
īīīīīīīīīī
īīīīīīīīīīīīīīīīīīīīī
2. Check the pilot valve
ī ī ī§īīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīī
īīīīīīīīīīīīīīīī
īīīīīīī
īīīīīīīīīīīīīīīīīīīīīīīīīīīīīīī©īīī
īīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīī
īīī ī²īīīīīīī īīīī īīīīīī īī
īīīīīīī īīīī īīīīīīīīīīīī īīīī-
sure.
īīī ī¬īīīīīīīīīīīīīīīīīīī
īīīīīīīīīīīīīīīīīī°ī³īīīīīīīīīīīī
ī³ī¶ī¬īīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīī
normal.
3. Check the spool operation
Disconnect the bucket hose connected to the pipe at
īīīīī
īīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīī-
connected hose.
īīī ī²īīīīīīī īīīī īīīīīī īī
īīīīīīī īīīī īīīīīīīīīīīī īīīī-
sure.
īīī ī¬īīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīīī
spool is normal.
īī ī¶īīīīīīīīīīīīīīīīīīīīīī°ī³īīīīīīīīī³ī¶ī¬ī
Lever to operate
Device to check
Relief valve ī³īīī
īµīīīīīīīīīīī R1 ī³ī
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