Skyjack SJ12 Service Manual

77
SJ12, SJ16
213558ADA
Electrical System Troubleshooting Section 4 – Troubleshooting Information
4.2-10 No Down Function from Platform Controls
NOTE
Down function is not proportionally controlled
1. Loose or broken wire #A from Joystick S7
connector pin #6 to Diode DA on Lift/Off/Drive
switch S3.
Check continuity. Replace if defective.
2. Open diode DA. Check diode. Replace if defective.
3. Loose or broken wire #A from Diode DA to Lift/
Off/Drive switch S3.
Check continuity. Replace if defective.
4. Open or defective Lift/Off/Drive switch S3.
Operate switch.Check continuity between wire
#A and wire #13 when Lift selected.Replace if
defective.
5. Loose or broken wire #13 from Lift/Off/Drive
switch S3 to Platform connector X1 pin #A7.
Check continuity. Replace if defective.
6. Loose or broken wire #13 in Mast control cable
or its connections.
Check continuity between Mast function cable
connector P2 pin #1 and Platform connector X1
pin #A7 on cable. Check for loose or corroded
connections on cable connectors.Replace if wire is
defective.
7. Loose or broken wire #13 from Mast function
cable connector P2 pin #1 to Down Valve coil
2H-13.
Check continuity. Replace if defective.
8. Loose or broken wire #02 from Base terminal
block to Down Valve coil 2H-13.
Check continuity. Replace if defective.
9. Defective Down Valve coil 2H-13. Check continuity through coil. Replace if defective.
4.2-11 Pothole Bars Will Not Retract
NOTE
Machine must be below high speed limit switch LS1 to allow the pothole bars to retract
1. Loose or broken wire #21 from base terminal
block to pothole release valve coil 2H-21.
Check continuity. Replace if defective.
2. Loose or broken wire #02 from base terminal
block to pothole release valve coil 2H-21.
Check continuity. Replace if defective.
3. Defective pothole release valve coil 2H-21. Check continuity through coil. Replace if defective.
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Skyjack SJ12 Specifications

General

Gradeability	25%
Drive Motor	24V DC
Machine Width	32 in (0.81 m)
Stowed Height	6.5 ft
Overall Width	32 in (0.81 m)
Stowed Height (Rails Folded)	6.5 ft
Drive Speed (Elevated)	0.5 mph (0.8 km/h)
Power Source	Electric