Page 120 December 2007
Telescopic Boom Series
Models SJ61T & SJ66T
194312
Section 4 - Troubleshooting InformationService and Maintenance
14. Loose or broken wire #21A from turret harness plug pin #5 to dump valve 2H-21A.
- Check continuity. Replace if defective.
15. Loose or broken wire #02 from dump valve 2H-21A to turret harness plug.
- Check continuity. Replace if defective.
16. Defective dump valve coil 2H-21A.
- Check continuity and resistance through coil. Replace if defective.
4.1-14 No Boom Up from Base Control Console
1. Loose or broken wire #10A from ignition/ pump switch S5 to boom switch S12.
- Check continuity. Replace if defective.
2. Defective boom switch S12.
- Check continuity through switch while activating up function between wires #10A and #14.
Replace switch if no continuity.
3. Loose or broken wire #14 from boom switch S12 to base terminal block.
- Check continuity. Replace if defective.
4. Loose or broken wire #14 from base terminal block to turret harness plug pin #4.
- Check continuity. Replace if defective.
5. Loose or broken wire #14 from turret harness plug pin #4 to boom up valve 4H-14.
- Check continuity. Replace if defective.
6. Loose or broken wire #02 from turret harness plug to boom up valve 4H-14.
- Check continuity. Replace if defective.
7. Defective boom up coil 4H-14.
- Check continuity and resistance through coil. Replace if defective.
4.1-15 No Boom Down from Base Control Console
1. Loose or broken wire #10A from ignition/ pump switch S5 to boom switch S12.
- Check continuity. Replace if defective.
2. Defective boom switch S12.
- Check continuity through switch while activating down function between wires #10A and #13.
3. If no continuity found, replace switch.
4. Loose or broken wire #13 from boom down switch S12 to base terminal block.
- Check continuity. Replace if defective.
5. Loose or broken wire #13 from base terminal block to turret harness plug pin #3.
- Check continuity. Replace if defective.
6. Loose or broken wire #13 from turret harness plug pin #3 to boom down valve 4H-13.
- Check continuity. Replace if defective.
7. Loose or broken wire #02 from turret harness plug to boom down valve 4H-13.
- Check continuity. Replace if defective.
8. Defective boom down coil 4H-13.
- Check continuity and resistance through coil. Replace if defective.
4.1-16 No Turret Rotate Left from Base Control Console
1. Loose or broken wire #10A from ignition/ pump switch S5 to resistor R1.
- Check continuity. Replace if defective.
2. Open resistor R1.
- Check resistor for 6 ohms. If no resistance found, replace resistor.
3. Loose or broken wire #10B from resistor R1 to turret rotate switch S13.
- Check continuity. Replace if defective.
4. Defective turret rotate switch S13.
- Check continuity through switch while activating rotate left function between wires #10B and
#32. If no continuity found, replace switch.
5. Loose or broken wire #32 from turret rotate switch S13 to base terminal block.
- Check continuity. Replace if defective.
To Next Page
Loading...
