Takeuchi TB 250 - Arm Cylinder Operation Is Slow or Lacks Force

5-33
5
ARM
TROUBLESHOOTING
Arm cylinder operation is slow or lacks force
1
Is the speed of the arm
cylinder within spec?
W
ithin spec
Normal
Out-of-spec
2 Check the pilot valve
Faulty
Repair
or replace the pilot
valve.
Normal
3
Check
the spool opera-
tion
Faulty
Repair
or replace the housing
block.
Normal
4
T
est the port relief valve
with a replacement valve
Problem solved
The port relief valve faulty
Repair or replace the port re-
lief valve.
No change
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?
“2. Service data, Performance criteria”
2. Check the pilot valve.
“5-31”
3. Check the spool operation.
“5-32”
4. Test the port relief valve with a replacement valve.
“5-32”