Takeuchi TB53FR - The Machine Slews, but Overrun When Slewing Stops Is Great, or It Cannot be Stopped

MACHINE CONFIGURATION
SLEWING
V-27 TB53FR
THE MACHINE SLEWS, BUT OVERRUN WHEN SLEWING STOPS IS GREAT, OR IT CANNOT BE STOPPED.
1
2
5
Is the amount of overrun
when slewing stops
within the standard?
Within the standard.
Normal.
Inspect the pilot valve.
Inspect the slew hydrau-
lic pressure.
Repair or replace the pilot
valve.
Repair or replace the housing
block.
Adjust the set pressure.
Repair or replace the slew re-
lief valve.
Not within the standard.
Normal
Faulty
3
Inspect the operation of
the spool.
Normal
Faulty
Pressure is low.
Adjust the pressure of
the slew relief valve.
Pressure doesn’t rise
1. Is the amount of overrun when slewing stops
within the standard?
“II. Specifications, Standards for Judging
Performance”
2. Inspect the pilot valve.
Inspect if the spool of the pilot valve returns to the
neutral position when the operation lever (slew)
is released after operation. Disconnect the hose
between the pilot valve and the control valve
(slew section) on the control valve side, then set
a pressure gauge in the disconnected hose.
• Read the pressure gauge after operating the
lever (slew), then releasing it.
• If the pressure is zero, the pilot valve is normal.
4
Inspect the check valve
of the slew brake valve.
Repair replace the brake valve.
Normal
Faulty