Takeuchi TB215R Workshop Manual page 250

The machine slews, but overruns a lot when slewing stops, or slewing cannot be stopped
is the amount of overrun
1 when slewing stops with-
in specs?
out-of-specs
2 check the pilot valve
normal
check the spool opera-
3
tion
normal
4 check the slew pressure
1. is the amount of overrun when slewing stops within
specs?
"2. Service data, Performance criteria"
2. check the pilot valve
check if the spool of the pilot valve returns to the neu-
tral position when the operation lever (slew) is released
after operation. Disconnect the hose connecting the
pilot valve and control valve (slew block) from the con-
trol valve. Fit the pressure gauge to the hose just dis-
connected.
• Operate the lever (slew) and then release it to read
the pressure gauge.
• If the pressure is zero, the pilot valve is normal.
sleWing
Within specs
Faulty
Faulty
Pressure too low
Adjust the slew relief valve
pressure
Pressure does not rise
5
5
TroubleshooTing
Slewing
normal
repair or replace the pilot
valve
Repair or replace the housing
block
Adjust to set pressure
repair or replace the relief
valve
5D0AX00