TROUBLESHOOTING
BUCKET
V-38TB53FR
THE BUCKET CYLINDER DOESN’T MOVE, OR THERE IS NO POWER.
1
3
4
Inspect the operation of
actuators other than the
bucket cylinder.
Inspect the operation of
the spool.
Perform a port relief
valve switching test.
Repair or replace the pilot
valve.
Repair or replace the housing
block.
Repair or replace the port re-
lief valve.
Normal
2
5
Inspect the pilot valve.
Normal
Normal
Does not change.
Faulty
Faulty
Operation
became normal.
Repair or replace the bucket
cylinder.
Inspect the bucket cylin-
der.
Faulty
The port relief valve is
faulty.
Right Travel Relief Valve R1 Pump P1
Lever Operated Places inspected
1. Inspect the operation of actuators other than
the bucket cylinder.
Inspect if the operation of the bucket only is faulty
by the table at right. If operation is faulty, inspect
the main relief valve and the hydraulic pump.
“V-6”
2. Inspect the pilot valve.
“V-30”
3. Inspect the operation of the spool.
“V-34”