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

5-26
5
BOOM
TROUBLESHOOTING
Boom cylinder operation is slow or lacks force
1
Is the speed of the boom
cylinder within specs?
W
ithin specs
Normal
Out-of-specs
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 by replacing the port
relief valve
Problem solved
The port relief valve is
faulty
Repair
or replace the port re-
lief valve.
No change
5 Check the boom cylinder
Faulty
Repair
or replace the boom
cylinder
1. Is the speed of the boom cylinder within specs?
“2. Service data, Performance criteria”
2. Check the pilot valve
“5-25”
3. Check the spool operation
“5-25”
4. Test by replacing the port relief valve
“5-25”