Skyjack SJ61T Service Manual

Page 124 December 2007
Telescopic Boom Series
Models SJ61T & SJ66T
194312
Section 4 - Troubleshooting InformationService and Maintenance
3. Open or defective diode D34-1.
- Check diode. Replace if defective.
4. Loose or broken wire #35A from diode D34-1 to resistor R2.
- Check continuity. Replace if defective.
5. Loose or broken wire #34 from jib down switch S17 to base connector plug A pin #16.
- Check continuity. Replace if defective.
6. Loose or broken wire #34 in boom cable A or its connectors.
- Check for continuity between pins #16 on cable A. Check for loose or corroded connections
on cable connectors. Replace if wire is defective.
7. Loose or broken wire #34 from plug A pin #16 to platform terminal block.
- Check continuity. Replace if defective.
8. Loose or broken wire #34 from platform terminal block to jib down valve 4H-34.
- Check continuity. Replace if defective.
9. Loose or broken wire #02 from platform terminal block to jib down valve 4H-34.
- Check continuity. Replace if defective.
10. Defective jib down valve coil 4H-34.
- Check continuity and resistance through coil. Replace if defective.
4.1-25 No Jib Up Or Down From Base Control Console
1. Loose or broken wire #35A from resistor R2 to base key switch S2.
- Check continuity. Replace if defective.
2. Open or defective base key switch S2.
- Select base control console on switch. Check continuity through switch. Replace if defective.
3. Loose or broken wire #42 from base key switch S2 to turret harness plug pin #16.
- Check continuity. Replace if defective.
4. Loose or broken wire #42 from turret harness plug pin #16 to proportional ow enable valve 2H-42.
- Check continuity. Replace if defective.
5. Loose or broken wire #02 from turret harness plug to proportional ow enable valve 2H-42.
- Check continuity. Replace if defective.
6. Defective proportional ow enable valve coil 2H-42.
- Check continuity and resistance through coil. Replace if defective.
4.1-26 No Manual Platform Level Up From Base Control Console
1. Loose or broken wire #10A from ignition/ pump switch S5 to platform level switch S15.
- Check continuity. Replace if defective.
2. Defective platform level switch S15.
- Check continuity through switch while activating level up function between wires #10A and
#41. If no continuity found replace switch.
3. Loose or broken wire #41 from platform level switch S15 to base terminal block.
- Check continuity. Replace if defective.
4. Loose or broken wire #41 from base terminal block to turret harness pin plug pin#15.
- Check continuity. Replace if defective.
5. Loose or broken wire #41 from turret harness pin plug pin#15 platform level up valve 4H-41.
- Check continuity. Replace if defective.
6. Loose or broken wire #02 from turret harness pin plug platform level up valve 4H-41.
- Check continuity. Replace if defective.
7. Defective platform level up valve coil 4H-41.
- Check continuity and resistance through coil. Replace if defective.
8. Loose or broken wire #41 from base terminal block to base connector plug B pin #11.
- Check continuity. Replace if defective.
9. Loose or broken wire #41 in boom cable B or its connectors.
- Check for continuity between pins #11 on cable B. Check for loose or corroded connections
on cable connectors. Replace if wire is defective.

Skyjack SJ61T Specifications

General

Brand	Skyjack
Model	SJ61T
Category	Lifting Systems
Language	English