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Electrical System
No Telescope Extend
NOTE
Boom Down may be disabled by the dual load zone system and/or overload system if equipped. Please first
ensure the boom is fully retracted and there are no faults in the overload system.
1. Loose or broken wire #10A from ignition/ pump
switch S5 to telescope switch S14.
2. Defective telescope switch S14.
3. Loose or broken wire #39 from telescope switch
S14 to base terminal block.
4. Loose or broken wire #39 from base terminal
block to turret harness plug pin #13.
No Platform Rotate Left
1. Loose or broken wire #10A from ignition/ pump
switch S5 to platform rotate switch S16.
2. Defective platform rotate switch S16.
3. Open or defective diode D36-1.
4. Loose or broken wire #37A from diode D36-1 to
resistor R1.
5. Loose or broken wire #36 from platform rotate
switch S16 to base connector plug A pin #18.
6. Loose or broken wire #36 in boom cable A or its
connectors.
7. Loose or broken wire #36 plug A pin #18 to
platform terminal block.
8. Loose or broken wire #36 from platform terminal
block to platform rotate left valve 4H-36.
9. Loose or broken wire #02 from platform terminal
block to platform rotate left valve 4H-36.
10. Defective platform rotate left valve coil 4H-36.
SJ82 T, SJ86 T
Section 4 – Troubleshooting Information
Check continuity. Replace if defective.
Check continuity through switch while activating
extend function between wires #10A and #39. If no
continuity found, replace switch.
Check continuity. Replace if defective.
Check continuity. Replace if defective.
Follow steps on No Boom Telescope Extend
Function from Base or Platform Consoles.
Check continuity. Replace if defective.
Check continuity through switch while activating
rotate left function between wires #10A and #36. 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 #18 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.
229040ABA
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