Skyjack SJ61T Service Manual

Page 112 December 2007
Telescopic Boom Series
Models SJ61T & SJ66T
194312
Section 4 - Troubleshooting InformationService and Maintenance
NOTE
All tests should be performed with boom over non-steering axle.
4.1 Electrical System
4.1-1 All Controls Inoperative
1. Battery disconnected or discharged.
- Connect battery or recharge.
2. Loose or broken B+ cable from battery to battery disconnect switch S1.
- Check continuity. Replace if defective.
3. Open or defective battery disconnect switch S1.
- Close switch. Replace if defective.
4. Loose or broken wire #03 from battery disconnect switch S1 to circuit breaker CB1.
- Check continuity. Replace if defective.
5. Circuit breaker CB1 tripped or defective.
- Reset breaker, check for defective wiring. Replace if defective.
6. Loose or broken wire #05 from circuit breaker CB1 to base emergency stop switch S3.
- Check continuity. Replace if defective.
7. Open or defective base emergency stop switch S3.
- Close switch. Replace if defective.
8. Loose or broken wire #07 from base emergency stop switch S3 to base key S2.
- Check continuity. Replace if defective.
9. Open or defective key select switch S2.
- Close switch. Replace if defective.
10. Loose or broken wire #60 from base terminal block to relay 60CR.
- Check continuity. Replace if defective.
11. Loose or broken wire #07 from base emergency stop switch S3 to relay 60CR.
- Check continuity. Replace if defective.
12. Loose or broken wire #02 from relay 60CR to base terminal block.
- Check continuity. Replace if defective.
13. Defective relay 60CR.
- Check relay. Replace if defective.
14. Loose or broken wire #9 from relay 60CR to base terminal block.
- Check continuity. Replace if defective.
15. Loose or broken wire #02 from base terminal block to circuit breaker CB2.
- Check continuity. Replace if defective.
16. Circuit breaker CB2 tripped or defective.
- Reset breaker, check for defective wiring. Replace if defective.
17. Loose or broken wire #00 from circuit breaker CB2 to battery negative.
- Check continuity. Replace if defective.
4.1-2 No Power To Platform
1. Open or defective key select switch S2.
- Close switch. Replace if defective.
2. Loose or broken wire #07A from key select switch S2 to plug A pins # 2 & 3 in base control console.
- Check continuity. Replace if defective.
3. Loose or broken wire #07A from plug A pins # 2 & 3 in platform control console to platform emergency
stop switch S4.
- Check continuity. Replace if defective.
4. Open or defective platform emergency stop switch S4.
- Check switch. Replace if defective.
5. Loose or broken wire #04 from platform emergency stop switch S4 to Ignition/E-pump switch S6
- Check continuity. Replace if defective.

Skyjack SJ61T Specifications

General

Brand	Skyjack
Model	SJ61T
Category	Lifting Systems
Language	English