Takeuchi TB 250 - Slewing Is Slow or Lacks Force

5-19
5
SLEWING
TROUBLESHOOTING
Slewing is slow or lacks force
1
Is the time needed for
slewing within specs?
W
ithin specs
Normal
Slow
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 Check the slew pr
essure
Pressure too low
Adjust the slew relief valve
pressure
Adjust to set pressure
Normal
Pressure does not rise
Repair or replace the relief
valve
5
Check
the check valve of
the slew brake valve
Faulty
Repair
or replace the brake
valve
Normal
6
Inspect
the slew drive re-
duction gears
Faulty
Repair
or replace the slew
drive reduction gears
Slew bearing is faulty Replace