Skyjack SJ85 AJ Service Manual

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SJ85 AJ229044ADA
Section 4 – Troubleshooting Information Electrical System
5. Loose or broken wire #23A from base terminal
block to turret harness plug pin #6.
Check continuity. Replace if defective.
6. Loose or broken wire #24A or #02 from turret
harness plug to left steer valve 4H-23A.
Check continuity. Replace if defective.
7. Defective left steer valve coil 4H-23A. Check continuity and resistance through coil.
Replace if defective.
Brake will not Release:
1. No output from valve driver J3 pin #24 to wire
#26.
Check continuity. Replace if defective.
2. Loose or broken wire 26 from valve driver J3 pin
#24 to plug B pin #5.
Check continuity. Replace if defective.
3. Loose or broken wire #16 in cable A or its
connectors.
Check for continuity between pins #11 on cable A.
Check for loose or corroded connections on cable
connectors. Replace if wire is defective.
4. Loose or broken wire #26 from base plug A pin
#11 to turret harness connector pin #6.
Check continuity. Replace if defective.
5. Loose or broken wire #26 from turret harness
connector pin #6 to 3H-26 Brake coil.
Check continuity. Replace if defective.
6. Loose or broken wire #02 wire from 3H-26 Brake
coil to ground.
Check continuity. Replace if defective.
7. Defective forward coil 3H-26. Check continuity and resistance through coil.
Replace if defective.
4.2-13 Direction Sensing Inoperative
1. Loose or broken wire #09 from base terminal
block to limit switch LS1.
Check continuity. Replace if defective.
2. Open or defective limit switch LS1. Adjust limit switch if required. Check continuity
through switch. Replace if defective.
3. Loose or broken wire #17 from limit switch LS1
to base terminal block.
Check continuity. Replace if defective.
4. Loose or broken wire #17 from base terminal
block to base plug B pin #6.
Check continuity. Replace if defective.
5. Loose or broken wire #17 in boom cable B or its
connectors.
Check for continuity between pins #6 on cable B.
Check for loose or corroded connections on cable
connectors. Replace if wire is defective.
6. Loose or broken wire #17 from base plug B
pin #6 to valve driver connector J2 pin #25 in
platform control console.
Check continuity. Replace if defective.
7. Defective valve driver channel input for direction
sense enable.
Replace if Defective.
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Skyjack SJ85 AJ Specifications

General

Brand	Skyjack
Model	SJ85 AJ
Category	Boom Lifts
Language	English