Skyjack SJ 4632 - 16 No Drive or Steer When Platform Elevated; 17 Elevated Drive Speed Does Not Activate; 18 Work Platform Drives in Slow Speed Only

SKYJACK, Page 9SJIII Conventional Series
143911
Section 4 - Troubleshooting Information Service and Maintenance
Electrical System (Continued)
4.1-16 No Drive or Steer when Platform Elevated
1. Pothole protection bars not fully lowered.
Clear obstructions. Repair as needed. -
2. Loose or broken wire #71 from base terminal block to pothole protection limit switch LS4.
Check continuity. Replace if defective. -
3. Defective pothole protection limit switch LS4.
Check switch. Replace if defective. -
4. Loose or broken wire #72 from pothole protection limit switch LS4 to base terminal block.
Check continuity. Replace if defective. -
5. Loose or broken wire #72 from base terminal block to pothole protection limit switch LS5.
Check continuity. Replace if defective. -
6. Defective pothole protection limit switch LS5.
Check switch. Replace if defective. -
7. Loose or broken wire #19 from pothole protection limit switch LS5 to base terminal block.
Check continuity. Replace if defective. -
4.1-17 Elevated Drive Speed Does not Activate
1. Loose or broken wire #59 from base terminal strip proportional relay 21CCR (ANSI/CSA) or 21ACR
(CE).
Check continuity. Replace if defective. -
1. Loose or broken wire #59A from proportional relay 21CCR (ANSI/CSA) or 21ACR (CE) to resistor
RST2.
Check continuity. Replace if defective. -
2. Resistor RST2 open.
Check resistor ohms, it should be 30 ohms. Replace if defective. -
3. Loose or broken wire #02 from resistor RST2 to base terminal block.
Check continuity. Replace if defective. -
4. Proportional relay 21CCR (ANSI/CSA) or 21ACR (CE) defective.
Check relay, replace if defective. -
4.1-18 Work Platform Drives in Slow Speed Only
1. Loose or broken wire #71 from base terminal block to high speed limit switch LS1A.
Check continuity. Replace if defective. -
2. Open or defective high speed limit switch LS1A.
Check switch. Replace if defective. -
3. Loose or broken wire #21 from high speed limit switch LS1A to low voltage protection resistor RST3.
Check continuity. Replace if defective. -
4. Defective low voltage protection resistor RST3.
Check resistor. Replace if defective. -
5. Loose or broken wire #21C (ANSI/CSA) or #21A (CE) from low voltage protection resistor RST3 to
proportional relay 21CCR (ANSI/CSA) or 21ACR (CE).
Check continuity. Replace if defective. -
6. Proportional relay 21CCR (ANSI/CSA) or 21ACR (CE) defective.
Check relay, replace if defective. -
7. Loose or broken wire #02 from proportional relay 21CCR (ANSI/CSA) or 21ACR (CE) to base terminal
block.
Check continuity. Replace if defective. -
8. Proportional controller S7 out of adjustment.
Adjust controller. Refer to Section 5, Joystick Adjusting Procedure. -