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