Skyjack SJ16 Service Manual

69
SJ12, SJ16
213558ADA
Electrical System Troubleshooting Section 4 – Troubleshooting Information
4.2 Electrical System Troubleshooting
4.2-1 All Controls Inoperative
1. Battery charger plugged into external power
source.
Disconnect charger cord. Check continuity between
wire #3A and #05 to test N.C. contact in Battery
Charger Cutoff Relay L1CR1.Replace charger if
contact is not closed when unplugged from external
power source.
2. Batteries disconnected or faulty.
Connect batteries and test each battery for proper
supply voltage.
3. Dirty or loose battery terminals. Clean and tighten connections.
4. Batteries charge low.
Check each cell with a hydrometer. Reading should
be 1.275 (fully charged). Recharge if low reading.
Replace if reading difference between cells is
0.050.
5. Main battery cables open or defective. Check continuity. Replace if defective.
6. Fuse F1 defective or open. Replace fuse.
7. Loose or broken wire #B+ from Battery to Main
Battery Disconnect S1.
Check continuity. Replace if defective.
8. Main battery disconnect switch S1 open or
defective.
Close switch. Check continuitybetween wire #B+
and wire #03 on switch.Replace switch if defective.
9. Loose or broken wire #03 from Main Battery
Disconnect S1 to Motor Contactor C1.
Check continuity. Replace if defective.
10. Loose or broken wire #03 from Main Battery
Disconnect S1 to circuit breaker CB1.
Check continuity. Replace if defective.
11. Defective or tripped circuit breaker CB1. Reset circuit breaker. Replace if defective.
12. Loose or broken wire #3A from circuit breaker
CB1 to Charger Cutoff Relay L1CR1.
Check continuity. Replace if defective.
13. Defective Battery Charger Cutoff Relay L1CR1. Check relay. Replace if defective.
14. Loose or broken wire #05 from Battery Charger
Cutoff Relay L1CR1 to Base Emergency Stop
switch S28.
Check continuity. Replace if defective.
15. Open or defective Base Emergency Stop switch
S28.
Close switch. Check continuity between wire #05
and wire #5A on switch. Replace if defective.
16. Loose or broken wire #5A from Base Emergency
Stop switch S28 to Idle/PLTF/Base Key switch
S10
Check continuity. Replace if defective.

Skyjack SJ16 Specifications

General

Gradeability	25%
Drive Motor	24V DC
Max Gradeability	25%
Platform Height	16 ft
Lift Capacity	500 lbs
Machine Width	0.76 m
Overall Width	0.76 m
Drive Speed (Stowed)	4.8 km/h
Drive Speed (Raised)	0.8 km/h
Turning Radius (Inside)	0 in
Power Source	24V DC Electric