2
5
ARM
TROUBLESHOOTING
5G1AX00ARM
3. Check the spool operation
Disconnect the arm hose connected to the pipe at the
-
nected hose.
spool is normal.
4. Test by replacing the port relief valve
Replace the port relief valve in question with a normal
port relief valve. If the arm cylinder operates with the re-
placement valve, the port relief valve used on the boom
side is faulty.
position after the above inspection.
5. Check the arm cylinder
Switch between the arm hose and the bucket hose
cylinder.
bucket cylinder, completely retract the arm cylinder
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