Skyjack 4632 - Page 74

SECTION 4, Page 6
SJIII Series - The Conventionals 129919
1. Pot Hole Protection Bars not fully lowered.
2. Loose or broken wire #71 from Base Terminal Block
(TB-1) to Pot Hole Protection Limit Switch (LS4).
3. Defective Pot Hole Protection Limit Switch (LS4).
4. Loose or broken wire #72 from Pothole Protection
Limit Switch (LS4) to Base Terminal Block (TB-1).
5. Loose or broken wire #72 from Base Terminal Block
(TB-1) to Pothole Protection Limit Switch (LS5).
6. Defective Pothole Protection Limit Switch (LS5).
7. Loose or broken wire #19 from Pothole Protection
Limit Switch to Base Terminal Block (TB-1).
1. Clear obstructions. Repair as needed.
2. Check continuity. Replace if defective.
3. Check switch. Replace if defective.
4. Check continuity. Replace if defective.
5. Check continuity. Replace if defective.
6. Check switch. Replace if defective.
7. Check continuity. Replace if defective.
4.1-14. No Drive Or Steer From Platform (Machines With Powered Platform Only)
1. Defective Lift/Drive Select Switch (S5).
2. Loose or broken wire #12 from Lift/Drive Select
Switch (S5) to Platform Terminal Block (TB-2).
3. Loose or broken wire #12 from Platform Terminal
Block (TB-2) to Powered Platform Limit Switch (LS2).
4. Open or defective Powered Platform Limit Switch
(LS2).
5. Loose or broken wire #12A from Powered Platform
Limit Switch (LS2).
6. Loose or broken wire #12A from Powered Platform
Limit Switch (LS2) to Platform Terminal Block (TB-2).
7. Open Diode (D12A).
1. Check switch. Replace if defective.
2. Check continuity. Replace if defective.
3. Check continuity. Replace if defective.
4. Check switch. Replace if defective.
5. Check continuity. Replace if defective.
6. Check continuity. Replace if defective.
7. Check diode. Replace if defective.
4.1-15. Right Steer Inoperative (Machines With a Powered Platform)
1. Defective Right Steer Switch (S7-2).
2. Loose or broken wire #23 from Right Steer Switch
(S7-2) to Platform Terminal Block (TB-2).
3. Loose or broken wire #23 from Platform Terminal
Block (TB-2) to Base Terminal Block (TB-1).
4. Loose or broken wire #23 from Base Terminal Block
(TB-2) to Steer Right Valve Coil (4H-23).
5. Defective Steer Right Valve Coil (4H-23).
6. Loose or broken wire #02 from Steer Right Valve
Coil (4H-23) to Base Terminal Block (TB-1).
7. Open Diode (D23).
1. Check switch. Replace if defective.
2. Check continuity. Replace if defective.
3. Check continuity. Replace if defective.
4. Check continuity. Replace if defective.
5. Check continuity through coil. Replace if defective.
6. Check continuity. Replace if defective.
7. Check diode. Replace if defective.
Troubleshooting Information - Electrical System
Probable Cause Remedy
4.1-16. Left Steer Inoperative (Machines With A Powered Platform)
1. Defective Left Steer Switch (S7-3).
2. Loose or broken wire #24 from Left Steer Switch
(S7-3) to Platform Terminal Block (TB-2).
3. Loose or broken wire #24 from Platform Terminal
Block (TB-2) to Base Terminal Block (TB-1).
4. Loose or broken wire #24 from Base Terminal Block
(TB-1) to Steer Left Valve Coil (4H-24).
5. Defective Steer Left Valve Coil (4H-24).
6. Loose or broken wire #02 from Steer Left Valve
Coil (4H-24) to Base Terminal Block (TB-1).
7. Open Diode (D24).
1. Check switch. Replace if defective.
2. Check continuity. Replace if defective.
3. Check continuity. Replace if defective.
4. Check continuity. Replace if defective.
5. Check continuity through coil. Replace if defective.
6. Check continuity. Replace if defective.
7. Check diode. Replace if defective.
4.1-13. No Drive Or Steer When Platform Elevated (All Machines)