Skyjack SJ61T - 20 No Platform Rotate Left from Base Control Console; 21 No Platform Rotate Right from Base Control Console

Page 122 December 2007
Telescopic Boom Series
Models SJ61T & SJ66T
194312
Section 4 - Troubleshooting InformationService and Maintenance
3. Loose or broken wire #39 from telescope switch S14 to base terminal block.
- Check continuity. Replace if defective.
4. Loose or broken wire #39 from base terminal block to turret harness plug pin #13.
- Check continuity. Replace if defective.
5. Loose or broken wire #39 from turret harness plug pin #13 to telescope extend valve 3H-39.
- Check continuity. Replace if defective.
6. Loose or broken wire #02 from turret harness plug to telescope extend valve 3H-39.
- Check continuity. Replace if defective.
7. Defective telescope extend valve coil 3H-39.
- Check continuity and resistance through coil. Replace if defective.
4.1-20 No Platform Rotate Left From Base Control Console
1. Loose or broken wire #10A from ignition/ pump switch S5 to platform rotate switch S16.
- Check continuity. Replace if defective.
2. Defective platform rotate switch S16.
- Check continuity through switch while activating rotate left function between wires #10A and
#36. If no continuity found, replace switch.
3. Open or defective diode D36-1.
- Check diode. Replace if defective.
4. Loose or broken wire #37A from diode D36-1 to resistor R2.
- Check continuity. Replace if defective.
5. Loose or broken wire #36 from platform rotate switch S16 to base connector plug A pin #18.
- Check continuity. Replace if defective.
6. Loose or broken wire #36 in boom cable A or its connectors.
- Check for continuity between pins #18 on cable A. Check for loose or corroded connections
on cable connectors. Replace if wire is defective.
7. Loose or broken wire #36 plug A pin #18 to platform terminal block.
- Check continuity. Replace if defective.
8. Loose or broken wire #36 from platform terminal block to platform rotate left valve 4H-36.
- Check continuity. Replace if defective.
9. Loose or broken wire #02 from platform terminal block to platform rotate left valve 4H-36.
- Check continuity. Replace if defective.
10. 10. Defective platform rotate left valve coil 4H-36.
- Check continuity and resistance through coil. Replace if defective.
4.1-21 No Platform Rotate Right from Base Control Console
1. Loose or broken wire #10A from ignition/ pump switch S5 to platform rotate switch S16.
- Check continuity. Replace if defective.
2. Defective platform rotate switch S16.
- Check continuity through switch while activating rotate right function between wires #10A and
#37. If no continuity found, replace switch.
3. Open or defective diode D37-1.
- Check diode. Replace if defective.
4. Loose or broken wire #37A from diode D37-1 to resistor R2.
- Check continuity. Replace if defective.
5. Loose or broken wire #37 from platform rotate switch S16 to base connector plug A pin #19.
- Check continuity. Replace if defective.
6. Loose or broken wire #37 in boom cable A or its connectors.
- Check for continuity between pins #19 on cable A. Check for loose or corroded connections
on cable connectors. Replace if wire is defective.
7. Loose or broken wire #37 plug A pin #19 to platform terminal block.
- Check continuity. Replace if defective.