Takeuchi TL150, Workshop Manual

Page: 306 / 312

V-24
TROUBLESHOOTING
BUCKET
Inspect movement of
the spool.
3
Inspect the pilot valve. 2
Inspect operation of
actuators other than the
bucket cylinders.
1
Repair or replace control
valve.
Normal
Normal
Faulty
Perform replacement
test for the port relief
valves. 4
Repair or replace port relief
valve.
Operation be-
came normal.
Problem lies with port
relief valve.
Repair or replace pilot
valve.
Normal
Faulty
Inspect the bucket cyl-
inders.
5
Repair or replace bucket
cylinder.
No change
Faulty
BUCKET CYLINDERS FAIL TO MOVE.
1. Inspect operation of actuators other than
the bucket cylinders.
Check the table at right to see if the problem lies
with the bucket cylinders alone. If the problem
does lie with the bucket cylinders, then check
the main relief valve and the hydraulic pump
(P3).
“V-9”
2. Inspect the pilot valve.
a. Disconnect the hose running from the pilot
valve to the control valve (bucket section) at
the control valve.
b. Fit a pressure gauge to the hose.
c. Engage the lever to operate the bucket and
measure the pressure.
• The bucket is working properly if pressure
varies from 0 to 3.1 MPa in accordance with
movement of the angle of the control lever.
T7E011
Pb2
Pa2
Lever operated Places to be checked
Lift arms Relief valve R3 Pump P3