Skyjack SJ85 AJ Service Manual

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SJ85 AJ 229044ADA
Electrical System Section 4 – Troubleshooting Information
No Turret Rotate Right from Base Console:
1. Loose or broken wire #10C from resistor R1 to
resistor R2.
Check continuity. Replace if defective.
2. Defective resistor R2. Check resistor, replace if defective.
3. Loose or broken wire #10D from resistor R3 to
turret rotate right switch S13.
Check continuity. Replace if defective.
4. Defective turret rotate right switch S13. Check continuity through switch while activating
up function between wires #10D and #33. Replace
switch if no continuity.
5. Loose or broken wire #33 from turret rotate right
switch S13 to base terminal block.
Check continuity. Replace if defective.
6. Loose or broken wire #33 from base terminal
block to turret harness plug pin #10.
Check continuity. Replace if defective.
7. Loose or broken wire #33 from turret harness
plug pin #10 to turret rotate right valve 4H-33.
Check continuity. Replace if defective.
8. Loose or broken wire #02 from turret harness
plug to turret rotate right valve 4H-33.
Check continuity. Replace if defective.
9. Defective turret rotate right coil 4H-32. Check continuity and resistance through coil.
Replace if defective.
No Turret Rotate Right from Platform Console:
1. Loose or broken wire #04 from platform terminal
block to joystick controller A1.
Check continuity. Replace if defective.
2. Loose or broken wire #02 from platform terminal
block to joystick controller A1.
Check continuity. Replace if defective.
3. No output on X-axis of joystick controller A1. Refer to joystick test procedure in section 5.
4. Loose or broken wire “X” from joystick controller
to J3 pin #15 of valve driver.
Check continuity. Replace if defective.
5. No output on J3 pin #24 of the valve driver to
wire #20B.
Check for 12 volts. If no voltage present with foot
on footswitch check section 5 for OCM pin voltage
reference.
6. No output on J2 pin #24 of the valve driver to
wire #32.
Check for a minimum 3.5 volts. If no voltage
present with foot on footswitch check section 5 for
OCM pin voltage reference.
7. Loose or broken wire #33 from valve driver J2
pin #24 to plug A pin #15 in platform control
console.
Check continuity. Replace if defective.
8. Loose or broken wire #33 in boom cable A or its
connectors.
Check for continuity between pins #15 on cable A.
Check for loose or corroded connections on cable
connectors. Replace if wire is defective.
9. Loose or broken wire #33 from base connector
plug A pin #15 to base terminal block.
Check continuity. Replace if defective.
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Skyjack SJ85 AJ Specifications

General

Brand	Skyjack
Model	SJ85 AJ
Category	Boom Lifts
Language	English