Skyjack SJ16 Service Manual

81
SJ12, SJ16
213558ADA
Electrical System Troubleshooting Section 4 – Troubleshooting Information
4.2-16 Brake will not Release
1. Open or shorted diode D16A Forward or D15A
Reverse.
Check diodes. Replace if defective.
2. Loose or broken wire #17 from base terminal
block to brake valve coil 2H-17.
Check continuity. Replace if defective.
3. Defective Brake valve coil 2H-17. Check continuity. Replace if defective.
4. Loose or broken wire #02 from Base terminal
block to Brake Valve coil 2H-17.
Check continuity. Replace if defective.
4.2-17 No Elevated Drive
1. Pothole protection bars not fully lowered.
Clear obstructions. Repair and/or replace as
needed.
2. Open diode D17. Check diode. Replace if defective.
3. Loose or broken wire #71 from base terminal
block to high speed limit switch LS1.
Check continuity. Replace if defective.
4. Defective high speed limit switch LS1. Test switch. Replace if defective.
5. Loose or broken wire #21 from high speed limit
switch LS1 to base terminal block.
Check continuity. Replace if defective.
6. Defective mast Position Relay 21CR1. Check relay. Replace if defective.
7. Loose or broken wire #71A from Mast Position
Relay 21CR1 to Base terminal block.
Check continuity. Replace if defective.
8. Loose or broken wire #71A from Base terminal
block to Pothole Limit switch LS2.
Check continuity. Replace if defective.
9. Defective or out of adjustment Pothole Limit
switch LS2.
Check limit switch. Replace if defective.
10. Loose or broken wire #72 from Pothole Limit
switch LS2 to Base terminal block.
Check continuity. Replace if defective.
11. Open diode D72. Check diode. Replace if defective.
12. Defective High Speed Relay 21CR. Check relay. Replace if defective.
13. Loose or broken wire #59F from High Speed
Relay 21CR to Base terminal block.
Check continuity. Replace if defective.
14. Defective Elevated Drive Resistor RST2. Check resistor and make sure it is secure. Replace
if defective.
4.2-18 Work Platform Drives in Slow Speed Only
1. Loose or broken wire #71 from Base terminal
block to high speed limit switch LS1.
Check continuity. Replace if defective.
2. Defective high speed limit switch LS1. Test switch. Replace if defective.
3. Loose or broken wire #21 from high speed limit
switch LS1 to base terminal block.
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