27 No Manual Platform Level Down From Base Control Console; 28 No Manual Platform Level Up From Platform Control Console - Skyjack SJ61T Service Manual

Section 4 - Troubleshooting Information
10. Loose or broken wire #41 from plug B pin #11 to platform terminal block.
- Check continuity. Replace if defective.
11. Open diode D41 located in platform terminal block.
- Check diode. Replace if defective.
-

4.1-27 No Manual Platform Level Down 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 down function between wires #10A and
#40. If no continuity found replace switch.
3. Loose or broken wire #40 from platform level switch S15 to base terminal block.
- Check continuity. Replace if defective.
4. Loose or broken wire #40 from base terminal block to turret harness pin plug pin #14.
- Check continuity. Replace if defective.
5. Loose or broken wire #40 from turret harness pin plug pin #14 platform level down valve 4H-40.
- Check continuity. Replace if defective.
6. Loose or broken wire #02 from turret harness pin plug platform level down valve 4H-40.
- Check continuity. Replace if defective.
7. Defective platform level down valve coil 4H-40.
- Check continuity and resistance through coil. Replace if defective.
8. Loose or broken wire #40 from base terminal block to base connector plug B pin #10.
- Check continuity. Replace if defective.
9. Loose or broken wire #40 in boom cable B or its connectors.
- Check for continuity between pins #10 on cable B. Check for loose or corroded connections
on cable connectors. Replace if wire is defective.
10. Loose or broken wire #40 from plug B pin #10 to platform terminal block.
- Check continuity. Replace if defective.
11. Open diode D40 located in platform terminal block.
- Check diode. Replace if defective.

4.1-28 No Manual Platform Level Up From Platform Control Console

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 up function between wires #08 and #41.
If no continuity found replace switch.
3. Loose or broken wire #41 from platform level switch S19 to platform terminal block.
- Check continuity. Replace if defective.
4. Open diode D41 located in platform terminal block.
- Check diode. Replace if defective.
Telescopic Boom Series
Models SJ61T & SJ66T
194312
This function times out after 15 seconds when operating this
December 2007
NOTE
function only.
Service and Maintenance
Page 125