1
Is the speed of the arm
cylinder within spec?
Within spec
Normal
Out-of-spec
2 Check the pilot valve
Faulty
Repair or replace the pilot
valve.
Normal
ī
Check the spool opera-
tion
Faulty
īµīīīīīīīīīīīīīīīīīīīīīīīīīīīīī
block.
Normal
4
Test the port relief valve
with a replacement valve
ī³īīī
īīīīīīīīīī
The port relief valve faulty
Repair or replace the port re-
lief valve.
ī±īīīīīīīī
5
Check for leak inside the
arm cylinder
Faulty
Repair or replace the arm cyl-
inder.
1. Is the speed of the arm cylinder within spec?
īīīīīī¶īīīīīīīīīīīīīī³īīīīīīīīīīīīīīīīīīīī
2. Check the pilot valve.
āArm cylinder does not move, 2. Check the pilot
valveā
3. Check the spool operation.
īīī¤īīīīīīīīīīīīīīīīīīīīīīīīīīīīīīī¦īīīīīīīīīīīīīīī
operationā
4. Test the port relief valve with a replacement valve.
īīī¤īīīīīīīīīīīīīīīīīīīīīīīīīīīīīīī·īīīīī
īīīīīīīīīīīī
the port relief valveā