No Slewing Is Possible - Takeuchi TB 250 Workshop Manual

SLEWING

No slewing is possible

Check the operation of
1 actuators other than of
the slew motor
Normal
2 Check the pilot valve
Normal
Check the spool opera-
3
tion
Normal
4 Check the slew pressure
Normal
5 Check the slew motor
Normal
Slew bearing is faulty
1. Check the operation of actuators other than of the
slew motor
Determine if only the slew motor is faulty by checking
the operation of actuators for the devices listed in the
table on the right. If one of them is faulty, check the
main relief valve and the hydraulic pump (main).
"5-5"
Faulty
Faulty
Pressure too low
Adjust the pressure of the
slew relief valve
Faulty
5-15
Pressure does not rise Repair or replace the relief
Lever to operate
Relief valve
Blade
5
TROUBLESHOOTING
SLEWING
Repair or replace the pilot
valve
Repair or replace the housing
block
Adjust to the set pressure
valve
Repair or replace the slew
motor
Replace
Device to check
Pump
R3 P3