Takeuchi TB53FR, Руководство по ремонту

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TROUBLESHOOTING
OVERALL MACHINE
V-12
TB53FR
b. Inspect the interference prevention relay.
Replace a normal speed relay (8) for the inter-
ference prevention relay (6) and inspect the
operation of the attachment. If the attachment
operates normally, it shows that the interfer-
ence prevention relay (6) is faulty.
<Solenoid Valves>
Turn on the boom switches A, B and C.
“III. Machine Configuration, Interference
Prevention System”
a. Inspect the wiring of the solenoid valves 1, 2,
and 3.
Remove the solenoid wiring (1), (2), and (3).
Apply the terminal of each wiring (wiring
color are 0.85Y and 0.85W) to the test prod on
the positive (+) side of the tester and ground the
test prod on the negative (-) side of the tester.
Then turn on the starter switch and check the
voltage.
• If the voltage is 12 V, the wiring is in the
normal state. If not, inspect the wiring for
the fault location.
b. Inspect the solenoids 1, 2, and 3.
“IV. Hydraulic Units, Solenoid Valve”
5. Inspect the pilot relief valve
Measure the pressure relieved through the pilot
relief valve.
• If the measured pressure is a reference value,
the valve is in the normal state.
“II. Specifications, Standards for Judging
Performance”
6. Inspect the pilot valve
“IV. Hydraulic Units, Pilot Valve and Pilot
Valve (Offset)”
7. Inspect the control valve
“IV. Hydraulic Units, Control Valve”
Stops left offset.
Stops boom raise.
Decelerates boom raise. Solenoid 1
Solenoid 2
Solenoid 3
J1E012
6
8
J1E013
1
2
3
0.85W
0.85W
0.85Y
SOL3
SOL2
SOL1