Boom, Bucket, Slew And Arm Fail To Move Or Are Too Slow - Takeuchi TB 250 Workshop Manual

Boom, bucket, slew and arm fail to move or are too slow.

1 Check the gear pump
Normal
2 Check the fuse
Normal
3 Check the limit switch
Normal
Check the lever lock sole-
4
noid valve
Normal
Check the pilot relief
5
valve
Normal
6 Check the pilot valve
1. Check the gear pump
Check the hydraulic pump (1) which supplies hydraulic
pressure to the pilot valve.
• The inspection procedure is the same as for the pis-
ton.
"5-3"
Also, check the line filter for clogging, and clean it as
necessary.
Faulty
Faulty
Faulty
Faulty
Faulty
Faulty
5-6
TROUBLESHOOTING
OVERALL MACHINE
• Repair or replace the gear
pump
• Replace the coupling
Replace the fuse
Adjust or replace the limit
switch
Repair or replace the lever
lock solenoid valve
Repair or replace the pilot re-
lief valve
Repair or replace the pilot
valve
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