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Electrical System
4.2-11 No Platform Rotate or Jib Functions
No Platform Rotate or Jib Funcions from Base:
1. Loose or broken wire 36C from Diodes D34-1,
D35-1, D36-1, and D37-1 to relay 36CCR .
2. Loose or broken wire 9 at relay 36CCR.
3. Loose or broken wire 02 at relay 36CCR.
4. Defective relay 36CCR.
5. Loose or broken wire 42 from relay 36CCR to
turret harness connector pin 11 .
6. Loose or broken wire 42 from turret harness
connector pin 11 to platform/jib flow enable valve
2H-42.
7. Loose or broken wire 02 from platform/jib flow
enable valve 2H-42 to turret harness connector.
8. Defective platform/jib flow enable valve coil 2H-
42.
No Platform Rotate or Jib Funcions from Platform:
1. No output on J3 pin #1 of the valve driver to wire
#42.
2. Loose or broken wire 42 from J3 pin #1 of valve
driver to platform terminal strip.
3. Loose or broken wire 42 from platform terminal
strip to plug A pin #5 in platform control console.
4. Loose or broken wire #42 in boom cable A or its
connectors.
5. Loose or broken wire 42 plug A pin #5 in base
control console to 42CR relay pin 85.
6. Loose or broken wire 02 to 42CR relay pin 86.
7. Loose or broken wire 9 to 42CR relay pin 30.
8. Defective realay 42CR.
9. loose or broken wire 42A from 42CR relay pin 87
to turret harness pin 11.
10. loose or broken wire 42A from 42CR relay pin 87
to turret harness plug pin 11.
SJ85 AJ
Section 4 – Troubleshooting Information
Check continuity. Replace if defective.
Check continuity. Replace if defective.
Check continuity. Replace if defective.
Check relay. 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 for 12 volts. If no voltage present with foot
on footswitch and function selected check section
5 for OCM pin voltage reference.
Check continuity. Replace if defective.
Check continuity. Replace if defective.
Check for continuity between pins #5 on cable A.
Check for loose or corroded connections on cable
connectors. Replace if wire is defective.
Check continuity. Replace if defective.
Check for ground at relay pin 86. Check for loose or
corroded connection. Replace if wire is defective.
Check for power at relay pin 30. Check for loose or
corroded connection. Replace if wire is defective.
Check operation of relay. Replace if defective.
Check continuity. Replace if defective.
Check continuity. Replace if defective.
229044ADA
121
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