Takeuchi TL150 Workshop Manual

V-18
TROUBLESHOOTING
LIFT ARMS
LIFT ARM CYLINDERS FAIL TO MOVE.
Inspect movement of
the spool.
3
Inspect the pilot valve.2
Inspect the operation of
actuators other than the
lift arm cylinders.
1
Inspect the lift arm cyl-
inders.
6
Inspect the arm float
solenoid valve.
5
Repair or replace control
valve.
Normal
Normal
Faulty
Perform replacement
test for the port relief
valves.
4
Repair or replace arm float
solenoid valve.
Repair or replace lift arm
cylinder.
Normal
Faulty
Repair or replace port relief
valve.
No change
Operation be-
came normal.
Problem lies with port
relief valve.
Repair or replace pilot
valve.
Normal
Faulty
1. Inspect the operation of actuators other
than the lift arm cylinders.
Check the table at right to see if the problem
lies with the lift arms alone. If the problem does
lie with the lift arms, 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 (lift arm section) at
the control valve.
b. Fit a pressure gauge to the hose.
c. Engage the lever to operate the lift arms and
measure the pressure.
• The lift arms are working properly if pressure
varies from 0 to 3.1 MPa in accordance with
movement of the angle of the control lever.
Lever Operated Places Inspected
Bucket Relief Valve R3 Pump P3
T7E007
Pb1
Pa1

Takeuchi TL150 Specifications

General

Travel Speed - High	11.2 mph (18 km/h)
Max Travel Speed	12.4 km/h
Width	1880 mm
Height	2320 mm
Lift Height	10.5 ft (3.2 m)