Skyjack SJ61T Service Manual

Telescopic Boom Series
Models SJ61T & SJ66T
194312
December 2007 Page 129
Section 4 - Troubleshooting Information Service and Maintenance
4.1-34 No Turret Right 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 #35 of the valve driver to wire #33.
- Check pin #10 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 #33 from valve driver pin #35 to plug A pin #15 in platform control console.
- Check continuity. Replace if defective.
8. Loose or broken wire #33 in boom cable A or its connectors.
- Check for continuity between pins #15 on cable A. Check for loose or corroded connections
on cable connectors. Replace if wire is defective.
9. Loose or broken wire #33 from base connector plug A pin #15 to base terminal block.
- Check continuity. Replace if defective.
10. Loose or broken wire #33 from base terminal block to turret harness plug pin #11.
- Check continuity. Replace if defective.
11. Loose or broken wire #33 from turret harness plug pin #11 to turret right valve 4H-33.
- Check continuity. Replace if defective.
12. Loose or broken wire #02 from turret harness plug to turret right valve 4H-33.
- Check continuity. Replace if defective.
13. Defective turret right valve coil 4H-33.
- Check continuity and resistance through coil. Replace if defective.or corroded connections on
cable connectors. Replace if wire is defective.
4.1-35 No Telescope Out from Platform Control Console
1. Loose or broken purple wire from speed controller to resistor R9 in platform control console.
- Check continuity. Replace if defective.
2. Open or defective resistor R9.
- Check resistor. Replace if defective.
3. Loose or broken wire #38B from resistor R9 to telescope switch S18.
- Check continuity. Replace if defective.
4. Defective telescope switch S18.
- Check continuity through switch while activating the function between wires #38B and #38A.
5. Loose or broken wire #38A from telescope switch S18 to valve driver pin #32.
- Check continuity. Replace if defective.
6. Voltage out of range at valve driver pin #32.
- Check voltage while operating telescope in. Voltage should be between 4.75 and 5.25 volts.
Refer to telescope voltage reference table in section 5 if out of this range.
7. 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.
8. No output on pin #9 of the valve driver to wire #38.
- Check pin #9 for minimum 3.5 volts. If no voltage present with foot on footswitch check section
5 for OCM pin voltage reference.

Skyjack SJ61T Specifications

General

Brand	Skyjack
Model	SJ61T
Category	Lifting Systems
Language	English