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Electrical System
3. Loose or broken jumper wire #36 on platform
terminal block.
4. Open or defective diode D36 in platform terminal
block.
5. Loose or broken wire #36A from platform
terminal block to valve driver pin #17.
6. Loose or broken wire #36 or #02 from platform
terminal block to rotate left valve 4H-36.
7. Defective rotate left valve coil 4H-36.
No Platform Rotate Right
1. Defective platform rotate switch S20.
2. Loose or broken wire #37 from platform rotate
switch S20 to platform terminal block.
3. Loose or broken jumper wire #37 on platform
terminal block.
4. Open or defective diode D37 in platform terminal
block.
5. Loose or broken wire #36A from platform
terminal block to valve driver pin #17.
6. Loose or broken wire #37 or #02 from platform
terminal block to rotate right valve 4H-37.
7. Defective rotate right Valve coil 4H-37.
No Jib Up
1. Defective jib switch S21.
2. Loose or broken wire #35 from jib switch S21 to
platform terminal block.
3. Loose or broken jumper wire #35 on platform
terminal block.
4. Open or defective diode D35 in platform terminal
block.
5. Loose or broken wire #34A from platform
terminal block to valve driver pin #33.
6. Loose or broken wire #35 or #02 from platform
terminal block to jib up valve 4H-35.
7. Defective jib up valve coil 4H-35.
SJ82 T, SJ86 T
Section 4 – Troubleshooting Information
Check continuity. Replace if defective.
Check diode. 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 right function between wires #08 and #37.
Check continuity. Replace if defective.
Check continuity. Replace if defective.
Check diode. 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 jib
up function between wires #08 and #35.
Check continuity. Replace if defective.
Check continuity. Replace if defective.
Check diode. Replace if defective.
Check continuity. Replace if defective.
Check continuity. Replace if defective.
Check continuity and resistance through coil.
Replace if defective.
229040ABA
135
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