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Section 4 – Troubleshooting Information
8. No output on pin #5 of the valve driver to wire
#20B.
9. No output on pin #12 of the valve driver to wire
#39.
10. Loose or broken wire #39 from valve driver pin
#12 to plug B pin #9 in platform control console.
11. Loose or broken wire #39 in boom cable B or its
connectors.
12. Loose or broken wire #39 from base connector
plug B pin #9 to base terminal block.
No Platform Rotate or Jib Function
1. Loose or broken wire #08 from platform terminal
block to rotate switch S20 and jib switch S21.
2. No output on pin #21 of the valve driver to wire
#42.
3. Loose or broken wire #42 from valve driver
pin #21 to plug B pin #24 in platform control
console.
4. Loose or broken wire #42 in boom cable B or its
connectors.
5. Loose or broken wire #42 from base connector
plug B pin #24 to base key switch S2.
6. Loose or broken wire #42 from base key switch
S2 to turret harness plug pin #16.
7. Loose or broken wire #42 from turret harness
plug pin #16 to proportional flow enable valve
2H-42.
8. Loose or broken wire #02 from turret harness
plug to proportional flow enable valve 2H-42.
9. Defective proportional flow enable valve 2H-42.
No Platform Rotate Left
1. Defective platform rotate switch S20.
2. Loose or broken wire #36 from platform rotate
switch S20 to platform terminal block.
229040ABA
134
Check pin #5 for 12 volts. If no voltage present with
foot on footswitch check section 5 for OCM pin
voltage reference.
Check pin #12 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 #9 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 pin #20 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 #24 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 through switch while activating
rotate left function between wires #08 and #36.
Check continuity. Replace if defective.
Electrical System
SJ82 T, SJ86 T
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