17 Direction Sensing Inoperative; 18 Steer Direction Sensing Inoperative - Skyjack SJ82 T Service Manual

Section 4 – Troubleshooting Information

4.2-17 Direction Sensing Inoperative

1. Loose or broken wire #09 from base terminal
block to limit switch LS1.
2. Open or defective limit switch LS1.
3. Loose or broken wire #17 from limit switch LS1
to base terminal block.
4. Loose or broken wire #17 from base terminal
block to base plug B pin #6.
5. Loose or broken wire #17 in boom cable B or its
connectors.
6. Loose or broken wire #17 from base plug B pin
#6 to valve driver pin #15 in platform control
console.
7. Defective valve driver channel input for direction
sense enable.

4.2-18 Steer Direction Sensing Inoperative

1. No output on valve driver pin #4 to wire #17A.
2. Loose or broken wire #17A from valve driver pin
#4 to relays 17ACR1 and 17ACR2.
3. Loose or broken wire #02 from platform terminal
block to relays 17ACR1 and 17ACR2.
4. Defective relays 17ACR1 and 17ACR2.
NOTE
If only one relay is bad and one is OK, you will have steer in one direction only.
229040ABA
144
Check continuity. Replace if defective.
Adjust limit switch if required. Check continuity
through switch. Replace if defective.
Check continuity. Replace if defective.
Check continuity. Replace if defective.
Check for continuity between pins #6 on cable B.
Check for loose or corroded connections on cable
connectors. Replace if wire is defective.
Check continuity. Replace if defective.
See section 5 for OCM pin voltage reference.
Check pin #4 for 12 volts. If no voltage present
with foot on footswitch check section 5 for OCM
pin voltage reference.
Check continuity. Replace if defective.
Check continuity. Replace if defective.
Check relay. Replace if defective.
Electrical System
SJ82 T, SJ86 T