Takeuchi TB53FR - Page 281

TROUBLESHOOTING
MACHINE TRAVEL
V-15 TB53FR
3. Inspect the linkage.
The inspection of the linkage is done by inspect-
ing the movement of the yoke (1) without the R
pin (2) and the pin (3) which connect the yoke (1)
and the spool.
4. Inspect the swivel joint.
• Disconnect the hose between the swivel joint
and the counterbalance valve from the coun-
terbalance valve side and set a pressure gauge
in the hose.
• Operate the travel lever and measure the pres-
sure.
• The swivel joint is normal if the pressure gauge
reading indicates the standard value.
Standard value: Approx. 20.6 MPa
5. Inspect the counterbalance valve.
• If neither forward nor reverse travel is pos-
sible, the spool (1) of the counterbalance valve
could be sticking in the neutral position.
• If either forward or reverse travel is possible,
the spool (1) of the counterbalance valve could
be sticking in a position other than the neutral
position.
• Disconnect the counterbalance valve plug (2)
and try pushing the spool (1) with a finger. It is
normal if it moves smoothly about 6 mm.
6. Inspect the travel motor.
“IV. Hydraulic Units, Travel Motor”