Skyjack SJ61T Service Manual

Page 128 December 2007
Telescopic Boom Series
Models SJ61T & SJ66T
194312
Section 4 - Troubleshooting InformationService and Maintenance
6. No output on pin #8 of the valve driver to wire #13.
- Check pin #8 for 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 #13 from valve driver pin #8 to plug A pin #6 in platform control console.
- Check continuity. Replace if defective.
8. Loose or broken wire #13 in boom cable A or its connectors.
- Check for continuity between pins #6 on cable A. Check for loose or corroded connections on
cable connectors. Replace if wire is defective.
9. Loose or broken wire #13 from base connector plug A pin #6 to base terminal block.
- Check continuity. Replace if defective.
10. Loose or broken wire #13 from base terminal block to turret harness plug pin #3.
- Check continuity. Replace if defective.
11. Loose or broken wire #13 from turret harness plug pin #3 to boom down valve 4H-13.
- Check continuity. Replace if defective.
12. Loose or broken wire #02 from turret harness plug to boom down valve 4H-13.
- Check continuity. Replace if defective.
13. Defective boom down valve coil 4H-13.
- Check continuity and resistance through coil. Replace if defective.
4.1-33 No Turret Left from Platform Control 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 A1 to valve driver pin #28.
- Check continuity. Replace if defective.
5. No output on pin #5 of the valve driver to wire #20B.
- Check pin #5 for 12 volts. If no voltage present with foot on footswitch check section 5 for
OCM pin voltage reference.
6. No output on pin #20 of the valve driver to wire #32.
- Check pin #20 for 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 #32 from valve driver pin #20 to plug A pin #14 in platform control console.
- Check continuity. Replace if defective.
8. Loose or broken wire #32 in boom cable A or its connectors.
- Check for continuity between pins #14 on cable A. Check for loose or corroded connections
on cable connectors. Replace if wire is defective.
9. Loose or broken wire #32 from base connector plug A pin #14 to base terminal block.
- Check continuity. Replace if defective.
10. Loose or broken wire #32 from base terminal block to turret harness plug pin #10.
- Check continuity. Replace if defective.
11. Loose or broken wire #32 from turret harness plug pin #10 to turret left valve 4H-32.
- Check continuity. Replace if defective.
12. Loose or broken wire #02 from turret harness plug to turret left valve 4H-32.
- Check continuity. Replace if defective.
13. Defective turret left valve coil 4H-32.
- Check continuity and resistance through coil. Replace if defective.

Skyjack SJ61T Specifications

General

Brand	Skyjack
Model	SJ61T
Category	Lifting Systems
Language	English