SKYJACK, Page 81
SJRT Compact Series
Engine Powered
4.1-21. High Drive Speed Inoperative
1. LIFT/DRIVE select switch (S3) in low drive position.
- Select high drive position on LIFT/DRIVE select switch.
2. Defective contacts on LIFT/DRIVE select swtich (S3) between wire #8B and wire #20.
- Check continuity through contact. Replace if defective.
3. Loose or broken wire #20 from LIFT/DRIVE select switch (S3) to relay (20CR)
- Check continuity. Replace if defective.
4. Loose or broken wire #02 from relay (20CR) to base terminal block (TB1).
- Check continuity. Replace if defective.
5. Defective relay (20CR).
- Check relay. Replace if defective.
6. Loose or broken wire #44 from base terminal block (TB1) to relay (20CR)
- Check continuity. Replace if defective.
7. Loose or broken wire #20A from relay (20CR) to relay (20ACR1).
- Check continuity. Replace if defective.
8. Loose or broken wire #20A from relay (20ACR1) to series/parallel valve coil (4H-20A).
- Check continuity. Replace if defective.
9. Loose or broken wire #02 from series/parallel valve coil (4H-20A) to base terminal block (TB1).
- Check continuity. Replace if defective.
10 Defective series/parallel valve coil (4H-20A).
- Check coil. Replace if defective.
11. Loose or broken wire #02 from relay (20ACR1) to base terminal block (TB1) (forward drive only).
- Check continuity. Replace if defective.
12. Defective relay (20ACR1) (forward drive only).
- Check relay. Replace if defective.
13. Loose or broken wire #20A from relay (20CR) to relay (20ACR2) (reverse drive only).
- Check continuity. Replace if defective.
14. Loose or broken wire #02 from relay (20ACR2) to base terminal block (TB1) (reverse drive only).
- Check continuity. Replace if defective.
15. Defective relay (20ACR2) (reverse drive only).
- Check relay. Replace if defective.
4.1-22. Up Circuit Inoperative From Platform
1. LIFT/DRIVE select switch (S3) in DRIVE position.
- Select LIFT on LIFT/DRIVE select switch.
2. Defective contact on LIFT/DRIVE select switch (S3) between wire #B and wire #14.
- Check continuity through contact. Replace if defective.
3. Defective forward switch (S7-5) on joystick controller (S7).
- Check switch. Replace if defective.
4. Loose or broken wire #B from forward switch (S7-5) to contact on LIFT/DRIVE select switch (S3).
- Check continuity. Replace if defective.
5. Loose or broken wire #14 from contact on LIFT/DRIVE select switch (S3) to base terminal
block (TB1).
- Check continuity. Replace if defective.
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