Takeuchi TB175W, Руководство по ремонту

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TROUBLESHOOTING
BOOM
V-28
TB175W
3. Inspect the operation of the spool.
Disconnect the hose between the control valve
(swing section) and the selector valve on the
selector valve side, then set a pressure gauge in
the disconnected hose.
• Operate the boom swing pedal and measure the
pressure.
• A pressure of 27.5 MPa is normal.
4. Inspect the selector valve.
a. Inspect the fuse.
Operate the solenoid valve and check the fuse
for the power supply circuit.
b. Inspect the selector switch.
Press the selector switch to turn it “ON”. While
it is this condition, check if there is continuity
with a tester.
c. Inspect the relay.
Press the selector switch to turn the relay to
“ON”. Check whether the voltage is applied to
the solenoid valve by using a tester. Be sure to
stop the engine before starting the inspection.
d. Inspect the solenoid valve.
“IV. Hydraulic Units, Solenoid Valves,
Swing/Adjust Cange”
10
10
10
20
20
10
20
10
5
10
5
10
20
20
20
10
L3E020
W2E009E
GRAY YELLOW
W2E010E
Solenoid Valve (4-Section)
Change and Speed Shift
OP1
OP2
MA1
MA1
MA2
MA2
MB2
MP2
MP1
5B1
5A1
MB1
SR
SH
W2E008