Skyjack SJ85 AJ Service Manual

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SJ85 AJ229044ADA
Section 4 – Troubleshooting Information Electrical System
4.2-5 No Riser Up or Down
No Riser Up from Base Console:
1. Loose or broken wire #10C from resistor R1 to
riser switch S25.
Check continuity. Replace if defective.
2. Defective riser switch S25. Check continuity through switch while activating
up function between wires #10C and #31. Replace
switch if no continuity.
3. Loose or broken wire #31 from riser switch S25
to base terminal block.
Check continuity. Replace if defective.
4. Loose or broken wire #31 from base terminal
block to turret harness plug pin #8.
Check continuity. Replace if defective.
5. Loose or broken wire #31 from turret harness
plug pin #8 to riser up valve 4H-31.
Check continuity. Replace if defective.
6. Loose or broken wire #02 from turret harness
plug to riser up valve 4H-31.
Check continuity. Replace if defective.
7. Defective riser up coil 4H-31. Check continuity and resistance through coil.
Replace if defective.
No Riser Up from Platform Console:
1. Loose or broken wire #04 from platform terminal
block to joystick controller A3.
Check continuity. Replace if defective.
2. Loose or broken wire #02 from platform terminal
block to joystick controller A3.
Check continuity. Replace if defective.
3. No output on R-Signal joystick controller A3. Refer to joystick test procedure in section 5.
4. Loose or broken R-signal wire from joystick
controller to J3 pin #19 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 #4 of the valve driver to wire
#31.
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 #31 from valve driver J2
pin #4 to plug A pin #13 in platform control
console.
Check continuity. Replace if defective.
8. Loose or broken wire #31 in boom cable A or its
connectors.
Check for continuity between pins #13 on cable A.
Check for loose or corroded connections on cable
connectors. Replace if wire is defective.
9. Loose or broken wire #31 from base connector
plug A pin #13 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