125
SJ82 T, SJ86 T
229040ABA
Electrical System
Section 4 – Troubleshooting Information
No Jib Up
1.
Loose or broken wire #10A from ignition/ pump
switch S5 to jib switch S17.
Check continuity. Replace if defective
2.
Defective jib up switch S17.
Check continuity through switch while activating
jib up function between wires #10A and #35.If no
continuity found, replace switch.
3.
Open or defective diode D35-1.
Check diode. Replace if defective.
4.
Loose or broken wire #35A from diode D35-1 to
resistor R2.
Check continuity. Replace if defective.
5.
Loose or broken wire #35 from jib up switch S17
to base connector plug A pin #17.
Check continuity. Replace if defective
6.
Loose or broken wire #35 in boom cable A or its
connectors.
Check for continuity between pins #17 on cable A.
Check for loose or corroded connections on cable
connectors. Replace if wire is defective.
7.
Loose or broken wire #35 from plug A pin #17 to
platform terminal block.
Check continuity. Replace if defective
8.
Loose or broken wire #35 from platform terminal
block to jib up valve 4H-35.
Check continuity. Replace if defective
9.
Loose or broken wire #02 from platform terminal
block to jib up valve 4H-35.
Check continuity. Replace if defective
10.
Defective jib up valve coil 4H-35.
Check continuity and resistance through coil.
Replace if defective.
No Jib Down
1.
Loose or broken wire #10A from ignition/ pump
switch S5 to jib switch S17.
Check continuity. Replace if defective
2.
Defective jib down switch S17.
Check continuity through switch while activating jib
down function between wires #10A and #34. If no
continuity found, replace switch.
3.
Open or defective diode D34-1.
Check diode. Replace if defective.
4.
Loose or broken wire #35A from diode D34-1 to
resistor R2.
Check continuity. Replace if defective
5.
Loose or broken wire #34 from jib down switch
S17 to base connector plug A pin #16.
Check continuity. Replace if defective
6.
Loose or broken wire #34 in boom cable A or its
connectors.
Check for continuity between pins #16 on cable A.
Check for loose or corroded connections on cable
connectors. Replace if wire is defective.
7.
Loose or broken wire #34 from plug A pin #16 to
platform terminal block.
Check continuity. Replace if defective
8.
Loose or broken wire #34 from platform terminal
block to jib down valve 4H-34.
Check continuity. Replace if defective
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