All Work Equipment, Swing, And Travel Mechanism Do Not Move Or Cannot Be Locked - Komatsu Galeo PC138US-8 Shop Manual

SEN02467-00
E-6 All work equipment, swing, and travel mechanism do not move or
cannot be locked
Trouble (1) All work equipment, swing, and travel mechanism do not move.
Related
information
1 Defective fuse No. 20
Defective lock lever switch
2
(Internal disconnection)
Defective PPC lock solenoid
3 (Internal disconnection or
short circuit)
Possible causes
Defective assembled-type
and standard
4 diode D01 (Internal short cir-
value in normal
cuit)
state
Disconnection in wiring har-
ness (Disconnection in wiring
5
or defective contact in con-
nector)
Ground fault in wiring har-
6 ness (Short circuit with GND
circuit)
16
Cause Standard value in normal state/Remarks on troubleshooting
If fuse is broken, circuit probably has ground fault. (See cause 6.)
a Prepare with starting switch OFF, then carry out troubleshoot-
Between (1) – (2)
a Prepare with starting switch OFF, then carry out troubleshoot-
Between (1) – chassis ground
a Prepare with starting switch OFF, then carry out troubleshoot-
a Prepare with starting switch OFF, then carry out troubleshoot-
Wiring harness between F01-20 – S14
(male) (1)
Wiring harness between S14 (male) (2) –
V01 (female) (2)
Wiring harness between V01 (female) (1) –
chassis ground (T08)
a Prepare with starting switch OFF, then carry out troubleshoot-
Wiring harness between F01-20 – S14
(male) (1), – circuit branch end
Wiring harness between S14 (male) (2) –
V01 (female) (2), – D01 (female) (4)
ing without turning starting switch ON.
S14 (female) Lock lever
ing without turning starting switch ON.
V01 (male)
Between (1) – (2)
ing without turning starting switch ON.
D01 (male)
Between (4) – (8)
ing without turning starting switch ON.
ing without turning starting switch ON.
40 Troubleshooting
Resistance
Lock Min. 1 Mz
Max. 1 z
Free
Resistance
20 – 60 z
Min. 1 Mz
Resistance (Continuity)
Min. 1 Mz (No continuity)
Resis-
tance
Resis-
tance
Resis-
tance
Resis-
tance
Resis-
tance
PC138US, USLC-8
1
Max. 1 z
Max. 1 z
Max. 1 z
Min. 1 Mz
Min. 1 Mz