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Electrical System
No Boom Down
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 boom switch S12.
2. Defective boom switch S12.
3. Loose or broken wire #13 from boom down
switch S12 to base terminal block.
No Turret Rotate Left
1. Loose or broken wire #10A from ignition/ pump
switch S5 to resistor R2.
2. Open resistor R2.
3. Loose or broken wire #10B from resistor R1 to
turret rotate switch S13.
4. Defective turret rotate switch S13.
5. Loose or broken wire #32 from turret rotate
switch S13 to base terminal block.
6. Loose or broken wire #32 from base terminal
block to turret harness plug pin #10.
7. Loose or broken wire #32 from turret harness
plug pin #10 to turret rotate left valve 4H-32.
8. Loose or broken wire #02 from turret harness
plug to turret rotate left valve 4H-32.
9. Defective turret rotate left valve coil 4H-32.
SJ82 T, SJ86 T
Section 4 – Troubleshooting Information
Check continuity. Replace if defective.
Check continuity through switch while activating
down function between wires #10B and #13. If no
continuity found, replace switch.
Check continuity. Replace if defective. Follow
steps on No Boom Down Function from Base or
Platform Consoles.
Check continuity. Replace if defective.
Check resistor for 7 ohms. If no resistance found,
replace resistor.
Check continuity. Replace if defective.
Check continuity through switch while activating
rotate left function between wires #10B and #32. If
no continuity found, replace switch.
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.
229040ABA
121
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