SKYJACK, Page 11SJIII Conventional Series
143911
Section 4 - Troubleshooting Information Service and Maintenance
Electrical System (Continued)
3. Defective lift/drive switch S3.
Check switch. Replace if defective. -
4. Loose or broken wire #18 from lift/drive switch S3 to base terminal block TB-1.
Check continuity. Replace if defective. -
5. Loose or broken wire #18 from base terminal block TB-1 to high speed limit switch LS1-B.
Check continuity. Replace if defective. -
6. Defective high speed limit switch LS1-B.
Check switch. Replace if defective. -
7. Loose or broken wire #18A from high speed limit switch LS1-B to rear drive manifold.
Check continuity. Replace if defective. -
8. Defective speed valve coil 3H-18A-1 or 3H-18A-2.
Check continuity through coil. Replace if defective. -
9. Loose or broken wire #02 from rear drive manifold to base terminal block TB-1.
Check continuity. Replace if defective. -
4.1-23 Right Steer Inoperative
1. Loose or broken wire #12B from lift/drive switch S3 to right steer switch S7-2.
Check continuity. Replace if defective. -
2. Defective right steer switch S7-2.
Check switch. Replace if defective. -
3. Loose or broken wire #23 from right steer switch S7-2 to base terminal block TB-1.
Check continuity. Replace if defective. -
4. Loose or broken wire #23 from base terminal block TB-1 to steer right valve coil 4H-23.
Check continuity. Replace if defective. -
5. Defective steer right valve coil 4H-23.
Check continuity through coil. Replace if defective. -
6. Loose or broken wire #02 from steer right valve coil 4H-23 to base terminal block TB-1.
Check continuity. Replace if defective. -
7. Open diode D23.
Check diode. Replace if defective. -
4.1-24 Left Steer Inoperative
1. Loose or broken wire #12B from lift/drive switch S3 to left steer switch S7-3.
Check continuity. Replace if defective. -
2. Defective left steer switch S7-3.
Check switch. Replace if defective. -
3. Loose or broken wire #24 from left steer switch S7-3 to base terminal block TB-1.
Check continuity. Replace if defective. -
4. Loose or broken wire #24 from base terminal block TB-1 to steer left valve coil 4H-24.
Check continuity. Replace if defective. -
5. Defective steer left valve coil 4H-24.
Check continuity through coil. Replace if defective. -
6. Loose or broken wire #02 from steer left valve coil 4H-24 to base terminal block TB-1.
Check continuity. Replace if defective. -
7. Open diode D24.
Check diode. Replace if defective. -
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