Skyjack SJ85 AJ Service Manual

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

General

Brand	Skyjack
Model	SJ85 AJ
Category	Boom Lifts
Language	English