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