Skyjack SJ61T Service Manual

Page 126 December 2007
Telescopic Boom Series
Models SJ61T & SJ66T
194312
Section 4 - Troubleshooting InformationService and Maintenance
4.1-29 No Manual Platform Level Down From Platform Control Console
NOTE
This function times out after 15 seconds when operating this
function only.
1. Loose or broken wire #08 from platform terminal block to platform level switch S19.
- Check continuity. Replace if defective.
2. Defective platform level switch S19.
- Check continuity through switch while activating level down function between wires #08 and
#40. If no continuity found replace switch.
3. Loose or broken wire #40 from platform level switch S19 to platform terminal block.
- Check continuity. Replace if defective.
4. Open diode D40 located in platform terminal block.
- Check diode. Replace if defective.
4.1-30 All Controls Inoperative From Platform Control Console
1. Open or defective emergency stop switch S4.
- Pull emergency switch out. Check continuity through switch. Replace if defective.
2. Loose or broken wire #4 from emergency stop switch S4 to platform terminal block.
- Check continuity. Replace if defective.
3. Loose or broken jumper wire #4 on emergency stop switch S4.
- Check continuity. Replace if defective.
4. Loose or broken pin jumper between #04 and #04A on platform terminal block (without generator
option only).
- Check continuity. Replace if defective.
5. Loose or broken wire #04 from platform terminal block to generator switch S22 (generator option only).
- Check continuity. Replace if defective.
6. Generator switch S22 in generator mode or is open or defective (generator option only).
- Select OFF mode on generator switch. Check continuity through switch from #04 to #04A.
Replace if defective.
7. Loose or broken wire #04A from generator switch S22 to platform terminal block (generator option only).
- Check continuity. Replace if defective.
8. Loose or broken wire #04A from platform terminal block to footswitch S11.
- Check continuity. Replace if defective.
9. Open or defective footswitch S11.
- Check continuity through switch while activating footswitch function between wires #04A and
#08A. If no continuity found replace switch.
10. Loose or broken wire #08A from footswitch S11 to valve driver pin #16.
- Check continuity. Replace if defective.
11. Loose or broken wire #04 from platform terminal block to valve driver pin #1, 2, & 13.
- Check continuity. Replace if defective.
12. Loose or broken wire #02 from platform terminal block to valve driver pin #26.
- Check continuity. Replace if defective.
13. No output on pin #6 of the valve driver to wire #08.
- Check pin #6 for 12 volts. If no voltage present with foot on footswitch check section 5 for valve
driver test procedure.
14. Loose or broken wire #08 from valve driver pin #6 to relay 08CR-1.
- Check continuity. Replace if defective.
15. Loose or broken wire #02 from platform terminal block to relay 08CR1.
- Check continuity. Replace if defective.

Skyjack SJ61T Specifications

General

Brand	Skyjack
Model	SJ61T
Category	Lifting Systems
Language	English