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Electrical System
7. No output on pin #5 of the valve driver to wire
#20B.
8. No output on pin #9 of the valve driver to wire
#38.
9. Loose or broken wire #38 from valve driver pin
#9 to plug B pin #8 in platform control console.
10. Loose or broken wire #38 in boom cable B or its
connectors.
11. Loose or broken wire #38 from base connector
plug B pin #8 to base terminal block.
12. Loose or broken wire #38 from base terminal
block to turret harness plug pin #12.
13. Loose or broken wire #38 from turret harness
plug pin #12 to telescope in valve 3H-38.
14. Loose or broken wire #02 from turret harness
plug to telescope in valve 3H-38.
15. Defective telescope in valve coil 3H-38.
No Telescope Out
NOTE
Telescope extend function 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 purple wire from speed
controller to resistor R9 in platform control
console.
2. Open or defective resistor R9.
3. Loose or broken wire #38B from resistor R9 to
telescope switch S18.
4. Open or defective resistor R10.
5. Defective telescope switch S18.
6. Loose or broken wire #38A from telescope
switch S18 to valve driver pin #32.
7. Voltage out of range at valve driver pin #32.
SJ82 T, SJ86 T
Section 4 – Troubleshooting Information
Check pin #5 for 12 volts. If no voltage present with
foot on footswitch check section 5 for OCM pin
voltage reference.
Check pin #9 for minimum 3.5 volts. If no voltage
present with foot on footswitch check section 5 for
OCM pin voltage reference.
Check continuity. Replace if defective.
Check for continuity between pins #8 on cable B.
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. Replace if defective.
Check continuity and resistance through coil.
Replace if defective.
Check continuity. Replace if defective.
Check resistor. Replace if defective.
Check continuity. Replace if defective.
Check resistor. Replace if defective.
Check continuity through switch while activating
the function between wires #38C and #38A.
Check continuity. Replace if defective.
Check voltage while operating telescope out.
Voltage should be between 2.25 and 2.75 volts.
Refer to telescope voltage reference table in
section 5 if out of this range.
229040ABA
133
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